Prismatic deflection loupe and adjustment techniques for adjusting loupes of different magnification power

Abstract

A prismatic deflection loupe comprises an ocular optics at a fixed ocular position; a prism at a fixed position to deflect an image embedded in an input light field and to direct said input light fiel

Description

[0001] PRISMATIC DEFLECTION LOUPE AND ADJUSTMENT TECHNIQUES FOR ADJUSTING LOUPES OF DIFFERENT MAGNIFICATION POWER

[0002] TECHNOLOGICAL FIELD AND BACKGROUND

[0003] The present disclosure is in the field of magnification viewers and relates to a prismatic deflection loupe particularly useful as ergonomic eyewear for medical professionals, as well as techniques for adjusting loupes of different magnifications.

[0004] Ergonomic loupes are specialized magnifying devices used in medical fields such as surgery, dentistry, and veterinary medicine. Their primary function is to provide magnification for precision tasks while maintaining proper posture and minimizing physical strain, especially neck and back pains. Ensuring they meet ergonomic standards is critical for both the practitioner’s health and the quality of patient care.

[0005] GENERAL DESCRIPTION

[0006] The present disclosure provides a novel prismatic deflection loupe which is configured to enable adjustable magnification within a wide range of magnification factors (e.g., 3x to lOx or higher factor) while enabling to maintain a given (desired) working distance of the loupe.

[0007] A working distance is the distance from the user's eyes to a region being observed by the user. Typically, the working distance may be in the range of about 30 to about 75 cm. Considering medical personnel, maintaining the given working distance during a medical procedure prevents the practitioner from needing to lean forward, adjust his / her position, or adjust additional optics when switching magnifications (switching between different magnification factors). On the practitioner’s side, this minimizes neck, back, and shoulder strain. On the workflow side, this ensures that the focal plane remains steady, reducing the need for frequent adjustments, thereby improving accuracy in procedures requiring high precision. In a prismatic deflection loupe configuration, a general path of input light collection is tilted relative to the user's line of sight in a neutral head position. Ideal and typically used tilt angles are around 35°-45° in order to minimize downward head tilt.

[0008] This tilt between the general path of input light collection and the user's line of sight can be provided by a prism configured and operable to deflect the input light being collected by an entry optics to propagate along an optical path parallel to the user's line of sight towards ocular optics at the user's eye.

[0009] According to the present disclosure, the prism is accommodated at a fixed position within a loupe body, and is configured as a single-element unit operable to deflect an image embedded in an input light field by a predetermined angle, resulting in deviation of the input light field from an input path to an optical path towards the ocular optics. Here, the optical path is substantially parallel to an optical axis of the ocular optics and the input path, which is a path from a given fixed location of a given entry optics at a distal portion of the loupe body towards the prism, forms a predetermined angle with the optical path.

[0010] Generally, any suitable prism configuration can be used, providing it is capable of maintaining the image embedded in the input light field as a right-handed image, i.e., not being inverted or reversed, and is capable of deviating the input light field at a predetermined angle (forming the angle between the optical path and the input path), e.g., in a range of about 20-45 degrees. Moreover, in a specific application of a loupe, it is desired that the prism is of a simple configuration (single-element unit) and has as small as possible weight.

[0011] An example of a suitable prism configuration is the Schmidt prism. The Schmidt prism is typically a right-angled prism with a unique geometry that includes two surfaces at different angles that are finely polished to create specific light deflection properties. The Schmidt prism is used primarily for image deflection and to invert or rotate images without causing significant distortion. The Schmidt prism redirects light in a controlled manner, often altering the light path by 90° or other specific angles, thus providing a 45° tilt angle between the general input path and the line of sight. In the prismatic deflection loupe of the present disclosure, the Schmidt prism is used to provide the 45° tilt angle without requiring any additional elements to correct for image inversion or reflection, as will be described further below. The prismatic deflection loupe of the present disclosure includes an ocular optics, and a magnification module at one side of the prism, and includes or allows for attachment to an entry optics (objective lens) at the other side of the prism.

[0012] The magnification module is adjustable to vary the magnification factor within a wide range, while enabling to keep the desired working distance which is defined by the given location of the given entry optics (its focal length) at the distal portion of the loupe body. The wide range of the magnification factor values can be formed by two or more sub-ranges, each being relatively large, while using respective two or more different entry optics (having different focal lengths), in order to maintain the working distance.

[0013] For example, such sub-ranges may include 3x to 7x and 5x to lOx or higher factor.

[0014] The novel configuration of the loupe, in which the novel adjustable magnification module is accommodated between the prism (configured as described above) and the ocular optics enables use of relatively small-size and relatively light-weight loupe while providing shift of the operational state of the loupe through a relatively large range of magnification factors.

[0015] For example, the length of the adjustable magnification module, may be about 13.6mm and a cross-sectional dimension (diameter) is about 17.6mm. The weight of the loupe, including the prism and the ocular optics (without the entry optics) may be about 12.2g.

[0016] The adjustable magnification module includes at least two lenses whose optical axes are substantially parallel to the optical axis of the ocular optics, and which are mounted for movement allowing to controllably modify a distance between them through two or more discrete positions (two or more lateral configurations of the at least two lenses) corresponding to the two or more magnification factors. Each controlled shift of the two lenses between different positions causes the lenses to move by distances different from one another, such that an effective focus of the combination of all the lenses of the loupe is maintained in accordance with the working distance, for multiple different magnification factors. The adjustable magnification module also includes an adjustment mechanism for controllably modifying the distance between the lenses thereby modifying their lateral configurations between each pair of preceding and successive lateral configurations, resulting in modification of the magnification factor between each pair of preceding and successive magnification factor values within the predetermined magnification range. The configuration of the adjustable magnification module of the present disclosure is such that, when moving / displacing the lenses through successive lateral configurations of the lenses, movement of one of the lenses is a non-linear function of the movement of at least one other lens. This allows for reducing a number of lenses in the magnification module providing a given magnification range, e.g., the use of only two lenses appears to be sufficient to change the magnification factor by a factor of 1.5 and higher.

[0017] Thus, according to one broad aspect of the present disclosure, there is provided a prismatic deflection loupe comprising: an ocular optics at a fixed ocular position at a proximal portion of a loupe body; a prism accommodated at a fixed position within the loupe body, the prism being configured as a single-element unit operable to deflect an image embedded in an input light field, propagating along an input path from a given fixed objective position of a given entry optics at a distal portion of the loupe body, and to direct said input light field to propagate along an optical path towards the ocular optics, such that said optical path being substantially parallel to an optical axis of the ocular optics and forms a predetermined angle with said input path; an adjustable magnification module accommodated upstream of the ocular optics with respect to a direction of propagation of the input light field through the loupe, the adjustable magnification module comprising at least first and second spaced-apart lenses having substantially parallel optical axes, and an adjustment mechanism configured for moving said at least first and second lenses with respect to each other thereby controllably modifying a distance between said at least first and second lenses and modifying lateral configurations of the at least first and second lenses to modify a magnification factor of the prismatic deflection loupe within a predetermined magnification range, wherein said moving of the at least first and second lenses through successive lateral configurations is such that movement of one of the at least first and second lenses is a non-linear function of movement of at least one other of the at least first and second lenses, while maintaining a given working distance of the loupe defined by the given entry optics at said given fixed location.

[0018] In some embodiments, the adjustable magnification module is accommodated in said optical path between the prism and the ocular optics, such that the optical axes of said at least first and second lenses are substantially parallel to the optical path, providing that the deflected input light field successively interacts with the first and second lenses while propagating towards the ocular optics.

[0019] In some other embodiments, the adjustable magnification module is accommodated in the input path upstream of the prism with respect to a direction of propagation of input light, such that the input light field successively interacts with the first and second lenses while propagating towards the prism.

[0020] The entry optics may be mounted at a fixed objective position at the distal portion of the loupe body.

[0021] In some embodiments, the entry optics is removably mountable on said loupe body to be at the fixed objective position at the distal portion of the loupe body, thereby enabling replacement of the entry optics to define a different value of the magnification range, while maintaining said working distance of the loupe.

[0022] The adjustment mechanism may be configured and operable for controllably modifying the distance between the first and second lenses by controlling a concurrent movement of the first and second lenses in opposite directions along the optical axes of the lenses.

[0023] The predetermined angle between the optical path and the input path may be about 20-45 degrees.

[0024] In some embodiments, the adjustment mechanism comprises a position controller connected to a barrel cam assembly for transferring a rotational movement of the position controller between an array of K discrete circumferential locations (K>2) of the position controller into a respective array of K different lateral configurations of the first and second lenses along said optical axes, said array of K different lateral configurations corresponding to an array of K magnification factors, {Mk}, respectively, of the loupe.

[0025] One of the first and second lenses may be a positive lens and the other - a negative lens. For example, the first lens is a negative lens, and the second lens is a positive lens.

[0026] In some embodiments, the focal length of the positive lens is equal to an absolute value of the focal length of the negative lens. In some other embodiments, the focal length of the positive lens is different from an absolute value of the focal length of the negative lens.

[0027] The adjustment mechanism may be configured and operable to control said concurrent movement of the first and second lenses such that a shift between each two successive lateral configurations of the first and second lenses corresponds to movement of the first and second lenses by different first and second distances, respectively.

[0028] In some embodiments, the adjustment mechanism is configured and operable to provide that said concurrent movement of the first and second lenses between different lateral configurations corresponding to the different magnification factors satisfies the following condition: a ratio Ri, (AXi(11+2))i / AXi(11+1))i, between a movement distance (AXi(11+2))i of the first lens resulting from a shift between three successive lateral configurations / z; (i+1); (i+2)] and a movement distance AXi(11+1))i of the first lens resulting from a shift between two successive lateral configurations [i; (i+1)], is different from a ratio R2, (AXI(1’1+2))2 / AXI(1’1+1))2, between a movement distance (AXI(11+2))2of the second lens resulting from the shift between three successive lateral configurations / z; (i+1); (i+2)] and a movement distance AXI(M+1))2of the second lens resulting from the shift between two successive lateral configurations [i; (i+1)].

[0029] The movement of the first and second lenses between said lateral configurations of the first and second lenses may be such that said ratio Ri differs from the ratio R2by a factor of at least 5%.

[0030] It should be noted that the lenses of the adjustable magnification module move together but in different paths. When the lenses move, the magnification changes but the focus and working distance remain the same.

[0031] In some embodiments, the adjustable magnification module and the adjustment mechanism are configured such that, for given properties of the entry optics and the ocular optics, said modifying of the lateral configurations of the first and second lenses is provided by varying the distance between the first and second lenses through at least two different discrete positions providing at least two different modification factors.

[0032] The prismatic deflection loupe may further comprise a duplex achromatic lens positioned between the second lens and the ocular optics.

[0033] The ocular optics may comprise a collimator lens.

[0034] The ocular optics may comprise an optical lens having prescribed vision correction properties.

[0035] The loupe body may be configured to be mountable on a glasses by attachment of the loupe body, by its proximal end, to an opening in a lens of the glasses. According to another broad aspect of the present disclosure, there is provided a prismatic deflection loupe comprising: an ocular optics at a fixed ocular position at a proximal portion of a loupe body; a prism accommodated at a fixed position within the loupe body, the prism being configured as a single-element unit operable to deflect an image embedded in an input light field, propagating along an input path from a given fixed objective position of a given entry optics at a distal portion of the loupe body, and to direct said input light field to propagate along an optical path towards the ocular optics, such that said optical path being substantially parallel to an optical axis of the ocular optics and forms a predetermined angle with said input path; and an adjustable magnification module accommodated between the prism and the ocular optics, the adjustable magnification module comprising at least first and second spaced-apart lenses having substantially parallel optical axes, and an adjustment mechanism configured for moving said at least first and second lenses with respect to each other thereby controllably modifying a distance between said at least first and second lenses and modifying lateral configurations of the at least first and second lenses to modify a magnification factor of the prismatic deflection loupe within a predetermined magnification range, wherein said moving of the at least first and second lenses through successive lateral configurations is such that movement of one of the at least first and second lenses is a non-linear function of movement of at least one other of the at least first and second lenses, while maintaining a given working distance of the loupe defined by the given entry optics at said given fixed objective position.

[0036] According to yet further broad aspect of the present disclosure, it provides a prismatic deflection loupe comprising: an ocular optics at a fixed ocular position at a proximal portion of a loupe body; a prism accommodated at a fixed position within the loupe body, the prism being configured as a single-element unit operable to deflect an image embedded in an input light field, propagating along an input path from a given fixed objective position of a given entry optics at a distal portion of the loupe body, and to direct said input light field to propagate along an optical path towards the ocular optics, such that said optical path being substantially parallel to an optical axis of the ocular optics and forms a predetermined angle with said input path; an adjustable magnification module accommodated in the input path upstream of the prism with respect to a direction of propagation of input light field, the adjustable magnification module comprising at least first and second spaced-apart lenses having substantially parallel optical axes, and an adjustment mechanism configured for moving said at least first and second lenses with respect to each other thereby controllably modifying a distance between said at least first and second lenses and modifying lateral configurations of the at least first and second lenses to modify a magnification factor of the prismatic deflection loupe within a predetermined magnification range, wherein said moving of the at least first and second lenses through successive lateral configurations is such that movement of one of the at least first and second lenses is a non-linear function of movement of at least one other of the at least first and second lenses, while maintaining a given working distance of the loupe defined by the given entry optics at said given fixed objective position.

[0037] The present disclosure also provides a binocular loupe system comprising: a frame configured to be worn on a head of a user; and a pair of prismatic deflection loupes mounted on the frame to be aligned with a pair of user's eyes, respectively, when the frame is worn by the user, wherein each of said prismatic deflection loupes is configured as described above.

[0038] In yet further aspect of the present disclosure, it provides a binocular loupe system comprising: user's glasses, and a pair of prismatic deflection loupes mounted on the glasses being aligned with a pair of user's eyes, respectively, when the glasses are worn by the user, wherein each of said prismatic deflection loupes is configured as described above.

[0039] The present disclosure also provides a kit comprising: the above-described binocular loupe system, and a set of two or more entry optics of different optical properties, each of said entry optics being removably mountable on the distal portion of the loupe body.

[0040] Magnifying loupe glasses, commonly referred to as "loupes," are specialized optical instruments designed to enhance the visual acuity of professionals by providing magnified views of small objects or fine details. These devices are commonly used in various fields such as medicine, dentistry, jewelry making, and electronics repair. In medicine, surgeons and general practitioners utilize loupes to perform intricate procedures with increased precision. Dentists rely on loupes to improve their visibility during dental surgeries and routine check-ups, ensuring better patient outcomes. Jewelers and electronic repair technicians use magnifying loupes to utilize loupes to inspect and manipulate minuscule components with precision, and perform delicate tasks that require enhanced visual detail.

[0041] Processes of fitting loupes for individuals involves several considerations to ensure optimal visual acuity, comfort, and ergonomics. Traditionally, loupe fitting is performed by measuring the interpupillary distance (IPD) of the individual, which is the distance between the centers of the pupils, in order to align the optical lenses of the loupes to fit the individual. The fitting may require both horizontal and vertical adjustment of the position of the loupes with respect to the pupils. However, achieving a precise fit, especially for high-magnification loupes, can be challenging. If the individual is uncertain with respect to which magnification level is required for her professional needs and visual characteristics, several frames of glasses may be presented to that individual, with a similar IPD and equipped with pairs of loupes of identical magnification power for each pair. This process required utilization of many different frames, a frame for each sample IPD for each of the different magnification power needed. So, for example, if a sales representative want to demonstrate loupes in six different magnification levels, and to provide for a wide variety of people by stocking frames with five different IPDs, the sales representative need to carry thirty frames, each with two loupes. This is cumbersome, heavy, expensive (e.g., carrying ten loupes for each magnification power in the example above). If the sales representative (or other professional) wants to demonstrate to the individual multiple types of loupes (e.g., straight loupes as well as prismatic loupes), the multiplications accumulate even further. It should be noted that in the example above, five different IPDs may only account for up to 70% or so of the people, while the novel methods and systems discussed below may be implemented to account for just about 100% of the relevant people (e.g., people with binocular visual acuity). Reaching similar levels using frames to which loupes are fixated at different IPDs may require such a salesperson to carry over 100 pairs, which is very expensive and limiting.

[0042] Additionally, such an approach of carrying a plethora of frames each preassembled with two loupes at predetermined IPD is hardly feasible when attempting to give the individual an experience of binocular vision (i.e., concurrent vision through both eyes) in high magnification loupes. High-magnification loupes (e.g., ranging from 4.5* to 8* or higher) present unique fitting challenges. At these magnification levels, even minor deviations in alignment or positioning can result in significant visual distortions, eye strain, and discomfort for the user. The depth of field, or the range of focus, becomes increasingly shallow, necessitating a more precise adjustment of the working distance between the user's eyes and the subject being viewed. Furthermore, individual variations in facial anatomy, such as the curvature of the nose and the depth of the eye sockets can impact the positioning of the loupes. Since the ability to provide binocular vision experience in such high magnification level is so dependent on very nuanced and accurate positioning, it is not practical in many situations to preassemble and carry around such variety of frames with preassembled loupes.

[0043] Providing a selection of fixed frames onto which loupes are preinstalled, as discussed above with respect to some existing solutions may result from any one or more of the following: limited adjustability (e.g., pre-configured loupes may not offer sufficient adjustments to accommodate individual variations in head size, eye positioning, and desired working distance); discomfort, reduced field of view (high-magnification loupes inherently have a smaller field of view; poor fitting can further restrict this crucial area, hindering overall efficiency), eye fatigue (incorrect alignment between the loupes and the wearer's eyes can lead to eye strain and fatigue), and inefficient and prolonged fitting and / or demonstrating of loupes, to one individual as well for a group of individuals.

[0044] The systems and methods disclosed below enable, among other things, provision of binocular vision experience in a wide range of magnification levels in a quick and efficient manner, with high adjustability for positioning so as to provide nuanced and accurate positioning, and thus high quality magnified binocular vision experience. Moreover, in many cases in which binocular vision experience in a wide range of magnification levels is to be provided for a large number of people, the high adjustability and other characteristics of the systems and methods discussed below provide even greater difference over the prior art. For example, in a scenario of a professional conventions or exhibition, especially an international one (see, for example, the illustration of Fig. 10), many people of very different IPDs and other facial characteristics may be interested to experience the binocular vision experience offered by the loupes (and loupes glasses) of a provider. In such cases, the systems and methods discussed below demonstrate simple and efficient techniques to quickly fit the loupes carrying frame to each individual, and then provide to each such individual an experience of the binocular vision enabled by a wide range of loupes, possibly including loupes of high magnification levels.

[0045] A method for adjusting loupes of different magnification powers to one person, for example, may include: a. Determining a right-eye loupe-position for a person based on a position of a right pupil of the person. This may optionally include, for example, determining a so- called horizontal position of the right pupil (e.g., along axis 1430) and / or determining a so-called vertical position of the right pupil (e.g., along axis 1420), or any other data (e.g., position along a curved line, position using other coordinates). b. Determining a left-eye loupe position for the person, based on a position of a left pupil of the person. This may optionally include, for example, determining a so- called horizontal position of the left pupil (e.g., along axis 1430) and / or determining a so- called vertical position of the left pupil (e.g., along axis 1420), or any other data (e.g., position along a curved line, position using other coordinates). c. Detachably connecting a first loupe to the ALMS at the right-eye loupeposition, and the detachably connecting a second loupe to the ALMS at the left-eye loupeposition, such that the first loupe and the second loupe point to a single focal locus, such as to present to the person — when the person wears the ALMS — a magnified and focused images of the focal locus via the first loupe and via the second loupe. The first loupe and the same loupe may be of the same magnification level (in which case, a binocular vision of an object may be presented to the person) or not (in which case the person may compare two focused images of the object at different magnification levels). d. After the person viewed the different focused images of the focal locus via the first loupe and via the second loupe, the method continues with disconnecting the first loupe from the ALMS. Optionally, the second loupe may also be disconnected from the ALMS. e. The method continues with detachably connecting to the ALMS at the right-eye loupe-position a third loupe having a magnification power different than a magnification power of the first loupe, such that the third loupe and a fourth loupe (which may be either the second loupe, or another loupe — e.g., of a different magnification level) concurrently coupled to the ALMS at the left-eye loupe position point to the single focal locus such as to present to the person — when the person wears the ALMS — magnified and focused images of the focal locus via the third loupe and via the fourth loupe.

[0046] The replacing of loupes connected to the ALMS may be continued, in order to enable the person to view the focal locus through a wider variety of loupes of different magnification levels, and / or of other varying properties. An example of a system which may be used as the ALMS for this method is discussed in greater detail below, e.g., with respect to system 1200.

[0047] After the person was presented with pairs of loupes fitted to their physiology (e.g., position of a right pupil, position of a left pupil, and possibly other parameters), the same ALMS may optionally be used to demonstrate a variety of loupes to additional people. For each person, the method may continue with determining the positions of their pupils, fitting the connection points of loupes to the ALMS accordingly, and repeatedly connecting and disconnecting various loupes to the ALMS, using the fitted connection points of each person - without having to readjust the connection points for each person after the initial setting. The connecting points

[0048] It is noted that different types of ALMS may be implemented, in which different techniques may be implemented to adjust the connection points of the loupes to the ALMS for different people, while retaining this setting for multiple loupes. For example, any one or more of the following techniques may be used for the physical detachable connection of the loupes to the ALMS: a. Magnetic Connection (e.g., using rare-earth magnets). b. Twist-Lock fastening mechanism (e.g., Bayonet Mount). c. Latch / Clamp Mechanism (e.g., a spring-loaded latch or clamp mechanism, including a locking mechanism to prevent accidental detachment). d. Threaded Connection. e. Groove System: (e.g., a sliding rail or groove system into which the loupe can lock at a dedicated location, with appropriate locking mechanism). f. Interlocking Mechanism (e.g., each loupe assembly could have protruding and / or recessed features that interlock with corresponding features on the ALMS). g. Friction Fit (using structures and high coefficients of friction, e.g., a part of the loupe assembly can fit snugly into a corresponding receptacle on the ALMS).

[0049] The connection mechanism (e.g., implementing any one or more of the techniques above) may optionally include one or more movable loupe-connectors to which different loupes can be connected interchangeably, such that the loupe-connector can move with respect to a rigid frame or any other support structure of the ALMS. Thus, the fitting of the ALMS to the physiology of each user may be achieved by moving such loupeconnectors to suitable positions for each person, based on the positions of their pupils, for example. After being reversibly affixed to such positions, different loupes may be interchangeably connected to each such loupe-connector, to provide the person to experience different loupes in a way which is suitable to their unique physiology.

[0050] For example, an adjustable loupes mounting system (ALMS) is disclosed to be used with interchangeable loupe is disclosed, that includes at least: a. A support structure configured to be steadied against a head of a person. Such a support may include, for example, a rigid or semirigid frame (e.g., similar to glasses frame), hard-hat / helmet mount, visor clip, adjustable straps assembly, and so on. b. A first rigid track and a second rigid track that are connected to the support structure (could be a separate part, or a part of the support structure, such as a hollow track inside the rigid solid frame). The first rigid track and the second rigid track may optionally be two parts of one continuous track. c. A left-loupe connector for securing different detachable loupes to the first rigid track at different times at different positions along at first rigid track. d. A right-loupe connector for securing different detachable loupes to the first rigid track at different times at different positions along at first rigid track.

[0051] For example, each loupe connector (out of the left-loupe connector and the rightloupe connector) may be moved along the respective rigid track and secured in different positions along that track (either in a continuous manner or in discrete locations). In another example, each loupe connector may be connected in an accurate fashion to different locations along the respective track. Different mechanisms may be implemented to make sure that the loupe connector (and thus any loupe which may be connected thereto) are correctly positioned and correctly oriented, e.g., with respect to the positions of the pupils of the user. An example of such an ASML is discussed with respect to system 1200.

[0052] According to yet further aspect of the present disclosure, there is disclosed a method for adjusting loupes of different magnification powers to a person, the method including: a. Determining a right-eye loupe-position for the person based on a position of a right pupil of the person; b. Determining a left-eye loupe position for the person, based on a position of a left pupil of the person; c. Detachably connection a first loupe to an adjustable loupe mounting system (ALMS) at the right-eye loupe-position, and detachably connection a second loupe to the ALMS at the left-eye loupe-position, such that the first loupe and the second loupe point to a single focal locus, such as to present to the person magnified and focused images of the focal locus via the first loupe and via the second loupe when the person wears the ALMS; d. Disconnecting the first loupe from the ALMS; and e. Detachably connection to the ALMS at the right-eye loupe-position a third loupe having a magnification power different than a magnification power of the first loupe, such that the third loupe and a fourth loupe concurrently connected to the ALMS at the left-eye loupe position point to the single focal locus such as to present to the person magnified and focused images of the focal locus via the third loupe and via the fourth loupe when the person wears the ALMS.

[0053] According to a further aspect of the present disclosure, the method may further include serially detaching and detachably attaching a plurality of loupes of different magnification powers to the ALMS at a loupe-position selected from a group consisting of the right-eye loupe-position and the left-eye loupe-position, such that after each instance of attachment the person is presented with a magnified and focused images of the focal locus via different loupes associated with different eyes of the user.

[0054] According to a further aspect of the present disclosure, the different loupes are connected to the ALMS such that the focal locus is positioned more than 30 degrees below an anatomical line of sight of the person.

[0055] According to a further aspect of the present disclosure, the first loupe and the third loupe are detachably connected to the ALMS in a first orientation with respect to the ALMS; the second loupe and the fourth loupe are detachably connected to the ALMS in a second orientation with respect to the ALMS; the first orientation is a leftward orientation, and the second orientation is a rightward orientation. According to a further aspect of the present disclosure, the determining of the right-eye loupe-position is followed by moving a first track-mounted adapter of the ALMS to the right-eye loupe-position, and the detachably connection of the first loupe to the ALMS includes detachably connection the first loupe to the first track-mounted adapter when the first track-mounted adapter is at the right-eye loupe-position; the detachably connecting of the third loupe to the ALMS in such case may include detachably connection the third loupe to the first track-mounted adapter when the first track-mounted adapter is still at the right-eye loupe-position.

[0056] According to a further aspect of the present disclosure, the first loupe may be a straight loupe and the third loupe may be an angled loupe, angled in a degree of more than 20°.

[0057] According to an aspect of the present disclosure, there is disclosed a method for adjusting loupes of different magnification powers to a plurality of people, the method including executing the method of any one of the previous six paragraphs for each person out of the plurality of people using the same ALMS.

[0058] According to an aspect of the present disclosure, there is disclosed an adjustable loupes mounting system for interchangeable loupes, the system including: (a) a support structure configured to be steadied against a head of a person; (b) a first rigid track connected to the support structure; (c) left-loupe connection for securing different detachable loupes to the first rigid track at different times at different positions along the first rigid track; (d) a second rigid track connected to the support structure; and (e) rightloupe connection for securing different detachable loupes to the second rigid track at different times at different positions along the second rigid track.

[0059] According to a further aspect of the present disclosure, the first rigid track and the second rigid track may be connected to the support structure at different positions along a superior-inferior axis of the support structure.

[0060] According to a further aspect of the present disclosure, the left-loupe connection is operable to secure a first detachable loupe to the first rigid track at a first distance from a midsagittal midline of the adjustable loupe mounting system concurrently to the rightloupe connection securing a second detachable loupe to the second rigid track at a second distance from the midsagittal midline, wherein the first distance differs from the second distance by more than 5%. According to a further aspect of the present disclosure, the adjustable loupes mounting system may further include a vertical displacement mechanism operable to controllably modify a vertical displacement of at least one of the left-loupe connection and the right-loupe connection along a superior-inferior axis of the support structure.

[0061] According to a further aspect of the present disclosure, at least one of the first rigid track and the second rigid track may be connected to a vertical track and is movable along the vertical track, and the vertical track may be connected to the support structure.

[0062] BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to better understand the subject matter that is disclosed herein and to exemplify how it may be carried out in practice, embodiments will now be described, by way of non-limiting example only, with reference to the accompanying drawings, in which:

[0064] Figs. 1A and IB exemplify a prismatic deflection loupe according to the principles of the present disclosure, wherein Fig. 1A shows the configuration where a magnification module is accommodated between a prism and ocular optics, and Figs. IB shows the configuration where the magnification module is accommodated upstream of the prism (i.e., between the prism and an entry optics),

[0065] Figs. 1C and ID exemplify the loups of the configurations 1A and IB, respectively, with specific implementation of an adjustment mechanism controlling operation of the magnification module;

[0066] Fig. 2 shows more specifically the optical components and their arrangement in the configuration of Fig. 1A;

[0067] Figs. 3A to 3C show an example of the adjustment mechanism implemented by a barrel cam assembly and followers in three different rotational positions, corresponding to different operational states of a magnification module corresponding to different magnification factors of the loupe;

[0068] Figs. 4A-4C, 5A-5C and 6A-6C show the operational state of the position controller (Figs. 4A, 5A, 6A), lateral configuration of the first and second lenses of the magnification module (Figs. 4B, 5B, 6B), and the beam tracing of the prismatic deflection loupe (Figs. 4C, 5C, 6C), corresponding to three different magnification factors, respectively, within a given magnification range obtainable for a given entry optics while maintain the working distance of the loupe; Figs. 7 A and 7B exemplify the asymmetry in the movement of the first and second lenses during magnification adjustment, wherein Fig. 7A shows each of first and second distances AXi and AX2, of the first and second lenses, as a function of magnification and respective linear and nonlinear curve fits; and Fig. 7B shows AX2 as a function of AXi;

[0069] Fig. 8 exemplifies a prismatic deflection loupe according to the principles of the present disclosure where a different magnification range is obtainable for a different entry optics, while maintaining the working distance of the loupe;

[0070] Figs. 9A to 9D show different views of user’s glasses (or a wearable head-frame) with a pair of prismatic deflection loupes mounted thereon with a proper alignment with user's eyes;

[0071] Fig. 10 is an illustration of one example situation in which one or more people need to experience magnified binocular vision using a plurality of different magnification levels;

[0072] Fig. 11 illustrates a method for adjusting loupes of different magnification powers to a person, in accordance with examples of the presently disclosed subject matter;

[0073] Fig. 12 illustrates a method for adjusting loupes of different magnification powers to multiple people, in accordance with examples of the presently disclosed subject matter;

[0074] Fig. 13 illustrates a method for adjusting loupes of different magnification powers to a person, in accordance with examples of the presently disclosed subject matter;

[0075] Figs. 14A-14D, 15A-15D, 16A-16D, 17A, 17B and 18 are different views of examples of adjustable loupes-mounting systems for interchangeable loupes, in accordance with the presently disclosed subject matter;

[0076] Figs. 19A and 19B illustrate examples of notations used in the disclosure for axes of displacement and axis of rotations, in accordance with examples of the presently disclosed subject matter; and

[0077] Figs. 20 and 21 illustrate methods for adjusting loupes of different magnification powers to multiple people, in accordance with examples of the presently disclosed subject matter.

[0078] It will be appreciated that for simplicity and clarity of illustration and description, certain elements in the figures may not have been drawn to scale. This could include the exaggeration of certain element dimensions relative to others. Additionally, corresponding or analogous elements may be identified using repeated reference numerals in the figures.

[0079] DETAILED DESCRIPTION OF EMBODIMENTS

[0080] In the following detailed description, numerous specific details are provided to ensure a comprehensive understanding of the present disclosure. While these details aid in understanding, those skilled in the art will recognize that the technique of the present disclosure can be implemented without these specific details. In addition, well-known methods, procedures, and components are not described in detail to avoid obscuring the present disclosure. References to a method, system, or non-transitory computer readable medium should be interpreted inclusively, as including related aspects of the present disclosure.

[0081] The functionality of the elements described herein may be implemented using circuitry or processing circuitry such as general-purpose processors, special purpose processors, integrated circuits, Application Specific Integrated Circuits (ASICs), and other conventional circuitries. Such circuitries and / or combinations thereof may be configured and / or programmed to perform the disclosed functionality. This also includes emerging technologies such as quantum processors and Al-driven systems. Processors, containing transistors and other components, are considered part of this circuitry. In this disclosure, the terms 'circuitry', 'units', or 'means' refer to hardware configured to perform the disclosed functions. Such processor may be implemented as purely hardware circuitry. In other possible implementations, processors, controllers, computers, units, or other means may be implemented using any combination of hardware with software and / or firmware.

[0082] The terms “computer”, “processor”, and “controller” should be expansively construed to cover any kind of electronic device with data processing capabilities, including, by way of non-limiting example, a personal computer, a server, a computing system, a communication device, a processor (e.g. digital signal processor, DSP), a microcontroller, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a smartphone, an electronic control unit (ECU) of a vehicle, cloud computing servers, an and so on. Unless stated otherwise, the terms “computer”, “processor”, and “controller” may also include a combination of several modules (e.g., several central processing units, CPUs), which operate together toward a goal. Unless specifically stated otherwise, as apparent from the following discussions, it is appreciated that throughout the specification discussions utilizing terms such as "processing", "calculating", “computing”, "determining", "generating", “setting”, “configuring”, “selecting”, “defining”, or the like, include actions and / or processes of a computer that manipulate and / or transform data into other data. That data is represented as physical quantities, e.g., such as electronic or electromagnetic quantities, and / or said data representing physical objects.

[0083] It is appreciated that certain features of the presently disclosed subject matter, which are, for the sake of clarity of description, described in the context of separate embodiments, may also be combined in a single embodiment. Conversely, various features of the presently disclosed subject matter, which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable subcombination. In embodiments of the presently disclosed subject matter one or more steps illustrated in the figures may be executed in a different order and / or one or more groups of steps may be executed simultaneously. The figures illustrate a general schematic of the system architecture in accordance with an embodiment of the presently disclosed subject matter. Each module in the figures can be made up of any combination of software, hardware and / or firmware that performs the functions as defined and explained herein. The modules in the figures may be centralized in one location or dispersed over more than one location.

[0084] Any reference in the specification to a method should be applied mutatis mutandis to a system capable of executing the method. Any reference in the specification to a method which can be executed by a computer should be applied mutatis mutandis to a non-transitory computer readable medium that stores instructions that once executed by a computer result in the execution of the method. All the details, variations, optional features, optional steps which are discussed with respect to a system are also applicable, mutatis mutandis, to such a corresponding method (and non-transitory computer readable medium, where applicable), and vice versa.

[0085] Reference is made to Figs. 1A and IB exemplifying a prismatic deflection loupe 10 according to the principles of the present disclosure. The loupe 10 defines a loupe body 20 having proximal and distal portions 20A and 20B. The loupe body may be constituted by a housing carrying / containing elements of the loupe. In the description below, the terms “loupe body” and “housing” are used interchangeably. As shown in the figures, the housing 20 carries an ocular optics 40 mounted at a fixed ocular position at the proximal portion 20A of the housing 20, a prism 50 at a fixed position in the housing, and an adjustable magnification module 60.

[0086] The loupe, when in operation, further includes a selected (given) entry optics module 30. The entry optics module 30 may be integral with the housing 20 and is positioned at a given fixed location at the distal portion 20B of the loupe body. In some embodiments, in order to enable the loupe to operate with two or more different magnification ranges while maintaining the working distance of the loupe, the housing 20 and the entry optics module 30 are configured to enable removable attachment of the selected entry optics module to the given fixed location at the distal portion 20B of the housing 20.

[0087] The entry optics module 30 carries a given / desired / selected objective lens unit (e.g., formed by one or two lenses). An optical axis OAi of the objective lens unit defines an input path IP of input light field being collected by the objective lens unit and propagating from the objective lens unit to the prism 50.

[0088] The prism 50 is configured and operable to redirect the input light field propagation from the input path IP to propagate along an optical path OP, tilted with respect to the input path (at a predetermined angular range), towards the ocular optics 40, while properly orienting an image embedded in the input light field, i.e., maintaining the image embedded in the input light field as a right-handed image, i.e., not being inverted or reversed. The prism 50 is configured to deflect the image embedded in the input light field, propagating along the input path IP from the given fixed location of the given entry optics 30 at the distal portion 20A of the loupe body 20, by a predetermined angle, resulting in deviation the input light field from the input path IP to propagate along the optical path OP towards the ocular optics 40. The optical path OP is substantially parallel to an optical axis OA2 of the ocular optics 40 and forms a predetermined tilt angle with the input path IP. For example, the tilt angle is about 45 degrees. The prism 50 is configured as a single-element unit.

[0089] As exemplified in Figs. 1A and IB, the adjustable magnification module 60 may be accommodated in the optical path OP between the prism 50 and ocular optics 40 (Fig. 1A), or may be accommodated in the input path IP upstream of the prism 50 with respect to a direction of propagation of the input light field (Fig. IB), such that, when the entry optics unit 30 is attached to the distal portion 20B of the housing, the adjustable magnification module 60 is between the prism 50 and the entry optics 30.

[0090] The adjustable magnification module 60 includes at least two spaced-apart lenses having substantially parallel optical axes, and includes or is associated with an adjustment mechanism 65. The adjustment mechanism 65 is configured for controllably modifying a distance d between the lenses of the module 60 along the optical path OP (in the configuration of Fig. 1A) or along the input path (in the configuration of Fig. IB), thereby modifying lateral configurations of the lenses, i.e., modifying accommodation of the lenses with respect to one another and with respect to the prism and ocular optics 40 (or entry optics 30). This modification of the lateral configurations of the first and second lenses 60A and 60B results in a corresponding modification of a magnification factor of the prismatic deflection loupe within a predetermined magnification range, while maintaining the given working distance of the loupe defined by the given entry optics 30 at a given fixed location.

[0091] The loupe of the present disclosure is configured to enable maintenance of the given working distance (defined by the location and optical properties (focal length) of the given entry optics), while varying the magnification factors between its different values within a predetermined range.

[0092] To this end, the configuration and operation of the adjustable magnification module 60 is such that when shifting the lenses from their preceding lateral configuration characterized by a distance dl between them into the successive lateral configuration characterized by a distance d2 between the lenses, the distance d2 is a non-linear function of the magnification. The configuration is such that when shifting the lenses of the adjustable magnification module between different lateral configurations, the lenses move together but in different paths, as will be described below. This allows use of a limited number of lenses within the adjustable magnification module 60, which results in a simpler and lighter loupe design.

[0093] The adjustment mechanism 65 is implemented as a barrel cam mechanism and is associated with a position controller 66 mounted on the external circumference of the housing 20. This is described more specifically further below. Figs. 1C and ID show schematically specific non-limiting examples of the configuration of the adjustment mechanism with the position controller in the loupes of the general configuration of Figs. 1A and IB, respectively. In some embodiments, the prismatic deflection loupe 10 also includes a duplex achromatic lens 70 positioned between the magnification module 60 and the ocular optics 40. It should also be noted that the ocular optics 40 may include an optical lens having prescribed vision correction properties of a user.

[0094] As described above, the entry optics module 30 is removably attachable to the housing 20 to be at a fixed objective position with respect to the prism at the distal portion of the housing 20. This enables replacement of the entry optics module 30 (i.e., replacement of the objective lens unit) to enable a different value of the magnification range, while maintaining the working distance of the loupe.

[0095] In the specific examples described below, the loupe of the general configuration of Fig. 1A is presented. It should be noted that, generally, at least from the loupe weight and center of mass points of view, the configuration of Fig. 1A might provide a better solution. However, the novel configuration of the present disclosure for the magnification module 60 and the associated adjustment mechanism 65 provides for relatively smallweight of the optics of the loupe and relatively compact optical scheme, thereby improving also the loupe configuration of Fig. IB.

[0096] In Fig. 2 (as in all the non-limiting examples described herein) the entry optics 30 may be implemented by Meniscus and Achromat lenses. It should, however, be noted that the present disclosure is not limited to this specific implementation. For example, the entry optics module 30 may comprise multiple optical elements, generally denoted 32, e.g., three lenses. Generally, the optical properties of the objective lens(es) is considered to define the number of lenses needed to obtain the desired effect.

[0097] For example, the prism 50 is configured as a Schmidt prism providing a compact and accurate deflection of the input path IP by about 20-45 degrees with respect to the optical path OP. The Schmidt prism used for the prismatic deflection loupe of the present disclosure is designed such that the input light field is deflected e.g., by an angle of 45°, while maintaining a right-handed image, i.e., the image is not inverted or reversed. However, Schmidt prisms can be designed to deflect light with various. Generally, other types of deflecting prisms may be used, while the Schmidt prism is preferable because it provides smaller and lighter solution for the loupe. Some examples of single-element prisms that may be configured for deflecting the image embedded in an input light field, without inverting or reversing the image, include right-angle prism, wedge prism, Pellin- Broca prism, Risley prism, and Amici prism. As shown in the example of Fig. 2, the adjustable magnification module 60 includes first and second lenses, 60A and 60B, having optical axes substantially parallel to the optical axis OA2 of the ocular optics 40 and accommodated on the optical path OP such that the input light deflected by the prism from the input path IP to the optical path OP successively interacts with the first lens 60A and the second lens 60B while propagating towards the ocular optics 40.

[0098] In the examples of the prismatic deflection loupe 10 described herein, the first lens 60A is a negative lens, and the second lens 60B is a positive lens. It should be noted that the focal length of the second (positive) lens 60B may be equal to or different from an absolute value of the focal length of the first (negative) lens 60A. The use of lenses of equal or different focal lengths would result in different paths of the lens' movements while shifting between different magnification factors.

[0099] Such arrangement of the adjustable magnification module 60 provides a zoom system where the separation and movements of the lenses 60A and 60B create a change in magnification while maintaining effective focus defined by all the lenses of the loupe and thus maintaining the working distance.

[0100] The loupe can be designed so that it provides relatively low magnification and then the adjustment mechanism 65 operable by the position controller 66 increases the magnification (in which case the negative lens is located upstream of the positive lens); or alternatively the loupe provides relatively high magnification and the adjustment mechanism 65 operable by the position controller 66 decreases the magnification (if the positive lens is placed upstream of the negative lens).

[0101] Reference is made to Figs. 3A to 3C showing an example of the adjustment mechanism 65 according to the present disclosure. The adjustment mechanism 65 includes a barrel cam assembly 67 configured and operable to transfer a rotational movement of the position controller 66 (not shown in these figures) between an array of K discrete circumferential locations (K>2) of the position controller 66 into a respective array of K different lateral configurations of the first and second lenses 60A and 60B along the optical path. The array of K different lateral configurations of the first and second lenses 60A and 60B corresponds to an array of K magnification factors of the loupe 10, respectively.

[0102] According to the present disclosure, the configuration of the adjustment mechanism is such that rotational movement of the position controller 66 causes concurrent movement of the first and second lenses 60A and 60B in opposite directions along the optical path OP.

[0103] More specifically, the adjustment mechanism is configured and operable to implement the concurrent movement of the first and second lenses 60A and 60B between different lateral configurations [i; (i+1); (i+2)] corresponding to the different magnification factors, such that the first lens movement is characterized by a linear ratio, and the second lens movement - by non-linear ratio. This can be described as follows: A ratio Ri= (AX(1,1+2))i / AX(1,1+1))i is different from a ratio R2, (AX(1,1+2))2 / AX(1,1+1))2, where (AX(1,1+2))i and (AX(11+2))2 are the movement distances of the first and second lenses, respectively, resulting from a shift between three successive lateral configurations / z; (i+1); (i+2)], and (AX(11+1))i and (AX(11+1))2 are the movement distances of the first and second lenses, respectively, resulting from a shift between two successive lateral configurations [i; (i+1)]. The ratio Ri may be different from ratio R2 by a factor of at least 5%

[0104] The barrel cam assembly 67 includes two followers 69 in contact with a cam surface and configured to move according to the cam profile. The two followers 69 are coupled to the first and second lenses 60A and 60B, respectively, such that concurrent movement of the followers along the cam profile, controlled by the rotation of the position controller 66, moves the lenses 60A and 60B thereby modifying the lateral configurations of the lenses 60A and 60B along the optical path OP.

[0105] Fig. 3A shows the barrel cam assembly 67 with the two followers 69 being in the smallest distance between them, providing the lateral configurations of the lenses 60A and 60B corresponding to the lowest magnification of the prismatic deflection loupe 10. Fig. 3B shows the barrel cam assembly 67 with the two followers 69 being in an intermediate distance, providing the lateral configurations of the lenses 60A and 60B corresponding to an intermediate magnification of the prismatic deflection loupe 10. Fig. 3C shows the barrel cam assembly 67 with the two followers 69 being in the largest distance, providing the lateral configurations of the lenses 60A and 60B corresponding to the largest magnification of the prismatic deflection loupe 10.

[0106] Thus, the adjustment mechanism 65, implemented with the barrel cam assembly 67, is configured and operable for controllably modifying the distance between the first and second lenses, 60A and 60B, by controlling the concurrent movement of the first and second lenses, 60A and 60B, in opposite directions along the optical path as described above.

[0107] Reference is made to Figs. 4A-4C, Figs. 5A-5C, and Figs. 6A-6C, exemplifying different operational states of the adjustable magnification module of the prismatic deflection loupe 10 for three magnification factors, respectively, with the given entry and ocular optics.

[0108] Specifically, the distance d between the first and second lenses 60A and 60B is modified through different discrete positions corresponding to a different magnification factor. It should be noted that the specific distances d between the first and second lenses 60A and 60B are defined inter alia by the lens material and the optical path configuration.

[0109] In the specific not limiting example, the discrete positions may vary from d=l .8 mm up to d=7.6 mm, corresponding to a smallest magnification, Mi=3.6x (Figs. 4A-4C), an intermediate magnification, M2=5.3x (Figs. 5A-5C), and a largest magnification, M3=7.2X (Figs. 6A-6C).

[0110] Figs. 4A, 5A and 6A show the respective operational states of the position controller 66, corresponding to multiple (e.g., three) discrete circumferential locations and transferring the rotational movement of the barrel cam assembly 67 (not shown in the figures) between an array of such multiple (e.g., three) corresponding different lateral configurations of the first and second lenses 60A and 60B along the optical path OP. The array of the three different lateral configurations corresponds to an array of three magnification factors of the loupe 10 {3.6x, 5.3x, 7.2x}, respectively, as described above. Figs. 4B, 5B and 6B show, respectively, the corresponding three different lateral configurations of the first and second lenses 60A and 60B along the optical path. Figs. 4C, 5C and 6C show, respectively, the beam tracing of the prismatic deflection loupe 10, in the three lateral configurations of the first and second lenses 60A and 60B along the optical path.

[0111] It is noted that the optical design of the prismatic deflection loupe of the present disclosure provides deflection of the image embedded in the input light field by a predetermined angle (e.g., 45°) by a single-element prism and does not require additional elements (e.g., additional cemented prism) to correct for image inversion and / or reflection. The beam tracing of the prismatic deflection loupe 10 shown in Figs. 4C, 5C and 6C demonstrates that the prism used which preserves original image orientation. This is implemented by configuring the prism with properly oriented three reflecting facets. Thus, when the position controller 66 is in its operation state shown in Fig, 4A, the lateral configuration of the lenses 60A and 60B provides the lowest magnification Mi, e.g., 3.6x. When the position controller 66 is rotated to its operation state shown in Fig. 5 A, this causes movement of the lenses 60 A and 60B in opposite directions bringing them into their intermediate lateral configuration changing the magnification from the lowest value Mi to the intermediate value M2, e.g., 5.3x. Further modifying the operation state of the position controller 66 to that shown in Fig. 6A causes movement of the lenses 60A and 60B in opposite directions into their highest lateral configuration corresponding to the higher M3, e.g., 7.2x.

[0112] As already described above, the adjustment mechanism 65 of the present disclosure may include barrel cam assembly 67 configured to transfer the rotational movement of the position controller 66 between array of K discrete circumferential locations (K>2) on the housing 20 into a respective array of K different lateral configurations of the first and second lenses 60A and 60B of the adjustable magnification module along the optical path.

[0113] As described above, the inventors have found that the predefined paths of the followers 69 of the barrel cam assembly 67 (shown in Figs. 3A-3C) corresponding to the lateral displacement of the first and second lenses 60A and 60B along the optical path, are not symmetrical. Specifically, the movement of the first (negative) lens 60A is linear with magnification, whereas the corresponding concurrent movement of the second (positive) lens 60B is nonlinear with magnification.

[0114] In other words, the barrel cam 65 is configured and operable to control the concurrent movement of the first and second lenses 60A and 60B such that a shift between each two successive lateral configurations of the first and second lenses corresponds to movement of the first and second lenses by different first and second distances AXi and AX2, respectively.

[0115] Let the preceding and 2 successive lateral configurations be denoted [ 1 ;2;3] and the corresponding positions of the first and second lenses X1!, X2i, X3i and X , X22, X32, and movement / displacement of the first and second lenses used to obtain these configurations, (AX(1,2))i, (AX(1,3))i and (AX(1,2))2’ (AX(1,3))2. The ratio Ri= (AXi(1’3))i / AXi(1’2))i is different from the ratio R.2= (AXI(1,3))2 / AXI(1’2))2. The ratio Ri may be different from ratio R2 by a factor of at least 5%. This is illustrated in Figs. 7A and 7B. Fig. 7A shows (absolute values of) the distance variations, AXi and AX2, of the first and second lenses 60A and 60B, respectively, along the optical path as the magnification is increased from Mi to M3 (e.g., from Mi=3.6 to M3=7.2). It can be seen that the first distance AXi linearly varies for the two successive lateral configurations [1, -2] and [2; 3], such that (AX(1,2))i = (AX(2, 3))i. On the other hand, the second distance AX2 is a non-linear function of the magnification. Fig. 7B shows the second distance AX2 as a function of the first distance AXi, which clearly exhibits a nonlinear dependence.

[0116] For example, the formulas of the optical constraints may be as follows:

[0117] AX2= C- (AX1)2+ 3C ■ AX1 wherein AX2 is the positive lens 60B movement, AXi is the negative lens 60A movement, C is the constant determined as C=| FfOcai| ■ R, F being the absolute value of the negative or positive lens focal length (FPos= —Fneg). The constant C changes according to the optical system, because R is the ratio of all the lenses in the system.

[0118] For example, R= 2.36 - 10-2. The focal length of the positive lens 60B is substantially equal to that of the negative lens 60A and is F=10.38mm. In this example, C=0.245. Therefore, the optical constraints provide AX2=0.245(AXI)2+ 0.735(AXi) resulting in the graph of Fig. 7B.

[0119] It is noted that through all the lateral configurations of the first and second lenses 60A and 60B corresponding to a given magnification range of the loupe, the given working distance of the loupe (defined by the given entry optics at a given fixed location within the loupe) is maintained.

[0120] As noted above, the prismatic deflection loupe of the present disclosure provides a wide adjustable magnification range. The same magnification module 60 may be used for a different magnification range, e.g., magnification range of {5x to 10x}, after the entry optics unit 30 is replaced with a different entry optics unit 30’, while maintaining the working distance of the loupe. This is shown in Fig. 8, where the entry optics unit 30’ is different from that of e.g., Fig. 1A, i e , the objective lens unit 32’ of the entry optics 30’ has a different focal length and different field of view or numerical aperture with respect to the surface being observed with the same desired working distance.

[0121] Reference is made to Figs. 9A-9D exemplifying a binocular loupe system 100 of the present disclosure. Such a binocular loupe system 100 includes: a frame 102 configured to be worn on a head of a user, which may be constituted by user’s glasses as exemplified in the figures; and a pair of the prismatic deflection loupes 10 configured as described above being mounted or mountable on the frame / glasses in a manner to be aligned with a pair of user's eyes, respectively, when the frame is worn by the user.

[0122] As shown in the figures, the lenses of the glasses may be formed with openings (and possibly also attachment mechanism) and the housing of the loupe may be configured (e.g., may include a corresponding attachment mechanism at the proximal end thereof) to be mountable / attachable in the respective opening in the lens of the glasses. As noted above, the ocular optics of the loupe may include an optical lens having prescribed vision correction properties of a user. As mentioned above, the weight of each loupe is slightly higher than 10 gr and the center of mass, when the loupe is attached to the glasses, may be approximately 9mm from the user’s nose (or the mounting point of the frame).

[0123] It should also be noted that the technique of the present disclosure may be implemented as a kit including: the binocular loupe system described above (user's glasses, and a pair of prismatic deflection loupes mounted on the glasses being aligned with a pair of user's eyes, respectively, when the glasses are worn by the user), and a set of two or more entry optics units of different optical properties. Each of such entry optics units is removably mountable on the distal portion of the housing.

[0124] As described above, the systems and methods disclosed below enable, among other things, the provision of binocular vision experience in a wide range of magnification levels in a quick and efficient manner, with high adjustability for positioning so as to provide nuanced and accurate positioning, and thus high quality magnified binocular vision experience. Moreover, in many cases in which binocular vision experience in a wide range of magnification levels is to be provided for a large number of people, the high adjustability and other characteristics of the systems and methods discussed below provide even greater difference over the prior art.

[0125] Fig. 10 is an illustration of one example situation in which one or more people 1100 need to experience magnified binocular vision using a plurality of different magnification levels. This is an example of a scenario of a professional conventions or exhibition, especially an international one, where many people of very different IPDs and other facial characteristics may be interested to experience the binocular vision experience offered by the loupes (and loupes glasses) of a provider. The experiencing of the magnified binocular vision may be facilitated by one or more professionals 1110 who are specialists in fitting loupes 1300 to people, such as optometrists or sales representatives. The systems and methods disclosed below enable, among other things, provision of binocular vision experience in a wide range of magnification levels in a quick and efficient manner, with high adjustability for positioning so as to provide nuanced and accurate positioning, and thus high quality magnified binocular vision experience. Moreover, in many cases in which binocular vision experience in a wide range of magnification levels is to be provided for a large number of people, the high adjustability and other characteristics of the systems and methods discussed below provide even greater difference over the prior art. For example, in a scenario of a professional conventions or exhibition, especially an international one (see, for example, the illustration of Fig. 10), many people of very different IPDs and other facial characteristics may be interested to experience the binocular vision experience offered by the loupes (and loupes glasses) of a provider. In such cases, the systems and methods discussed below demonstrate simple and efficient techniques to quickly fit the loupes carrying frame to each individual, and then provide to each such visual an experience of the binocular vision enabled by a wide range of loupes, possibly including loupes of high magnification levels.

[0126] Figs. 14A-14D are different views of an example of system 1200 which is an adjustable loupes-mounting system for interchangeable loupes 1300, in accordance with the presently disclosed subject matter. It should be noted that system 1200 is just one of the systems in which method 1500 may be implemented.

[0127] System 1200 includes at least the following components: a. Support structure 1210 configured to be steadied against a head of a person (e.g., a person 1100). Such a support may include, for example, a rigid or semirigid frame (e.g., similar to glasses frame), hard-hat / helmet mount, visor clip, adjustable straps assembly, and so on. b. First rigid track 1222 connected to support structure 1210. A track is a linear guide mechanism engineered to allow a slider or another component (e.g., loupeconnector) to move or be repositioned along its length with precision and control. First rigid track 1222 (and similarly, second rigid track 1224) can be designed in various forms, including among others: straight, curved, or angled configurations. The tracks may optionally feature grooves, rails, or channels to ensure smooth and frictionless repositioning of the respective loupe-connector. The tracks may optionally be straight, arced (e.g., following an arc of a circle, ellipse, parabola), or curved in any other way. The term “linear” in the context of the tracks pertains to the fact that a single distance parameter determines a position along the respective track. The tracks may optionally incorporate additional features such as stops, detents, or locking mechanisms to enhance functionality, providing stability and security to the attached components during operation. The materials used for the tracks and for the associated loupe-connectors can vary, including for example metals, plastics, or composites, tailored to the specific demands of durability, load-bearing capacity, and environmental conditions. First rigid track 1222 and / or second rigid track 1224 may be connected to support structure 1210 directly or indirectly. For example, first rigid track 1222 and / or second rigid track 1224 may be connected to a vertical track (an optional component of vertical displacement mechanism 1240) and be movable along the vertical track, and the vertical track may be connected in such case to support structure 1210 (in a fixed, detachable, and / or movable way; directly or indirectly). c. Left-loupe connector 1232, for securing different detachable loupes 1300 to first rigid track 1222 at different times, at different positions along first rigid track 1222. Left-loupe connector 1232 may optionally be detachably attached to first rigid track 1222 (e.g., using magnets or various other connection techniques, such as the ones discussed above), but this is not necessarily so. For example, left-loupe connector 1232 may be operable to slide along first rigid track 1222, and be reversibly fastened (e.g., using screws, latches, or any other suitable manner) to different locations along first rigid track 1222, e.g., to fit to the location of the left pupil of an individual for which system 1200 is being fitted. d. Second rigid track 1224 connected to support structure 1210. As discussed above, first rigid track 1222 and second rigid track 1224 may optionally be implemented as two parts of one continuous track, or as to separate tracks. It is noted that optionally, system 1200 may include more than two tracks (e.g., in different heights with respect to the coronal plane), for connecting loupes along different tracks on both sides of the face. Alternatively or additionally, other mechanisms (such as vertical displacement mechanism 1240) may be implemented for vertical positioning adjustment, if required. e. Right-loupe connector 1234 for securing different detachable loupes 1300 to second rigid track 1224 at different times at different positions along second rigid track 1224

[0128] Figs. 15A-15D are different views of an example of system 1200, in accordance with the presently disclosed subject matter. It should be noted that system 1200 is just one of the systems in which method 1500 may be implemented. As can be seen, support structure 1210 may need additional steadying, either by one or more other modules of system 1200 and / or by auxiliary modules. Such modules may include, for example, rigid or semirigid extensions (which may or may not be movable with respect to support structure 1210), flexible extensions (e.g., straps, elastic bands), cushioning modules (e.g., cushions, soft pads, padded bases), non-slip grip pads, adjustable brackets, custom molds, etc. Such additional modules may be connected, secured and / or adjusted in any suitable manner, such as using screws, latches, magnets, loops and hoops fasteners, clamps, hooks, adhesive strips, and snaps. System 1200 may be provided with such additional components, or such components may be added later (e.g., by a salesperson or other professional using system 1200).

[0129] System 1200 may include different types of mechanisms to enable connection of loupes to the ASML in different positions which are determined for different people individually, in a manner that is both quick, accurate, sufficiently secure in providing stable and position-accurate connection (e.g., for at least the 5-30 minutes of a demonstration, optionally much longer), and easily detachable. Such mechanisms may include, for example, moving left-loupe connectors (e.g., 1232 , 1234) which can be secured in a highly granular manner (e.g., secured in different times to different positions which are less than 1mm apart, less than 2mm apart, etc.), and to which different loupes may be quickly attached and detached in a manner that is both secure and accurate (e.g., both accurate position and accurate orientation of the loupe with respect to the respective loupe connector).

[0130] For example, such secure, accurate, and quickly detachable mechanisms may include alignment systems (e.g., magnet assisted and / or mechanical alignment systems) that employ any one or more of the following features: (i) asymmetric magnet arrays to enforce unique positioning and orientation through polarity constraints; (ii) mechanical keying features such as tabs, ridges, or slots that prevent rotational misalignment; (iii) locating pins and mating recesses that provide repeatable positioning with sub-millimeter precision; (iv) chamfered or tapered guide surfaces that facilitate self-centering during attachment; and / or (v) integrated detents or snap-fits (e.g., spring-ball detents or resilient latch arms) that, in combination with magnetic attraction, provide tactile feedback and reinforce the stability of the connection over the desired duration. In some embodiments, kinematic couplings or mechanical stops may also be used to constrain the connection in all degrees of freedom, enhancing positional fidelity even under minor external perturbations. It is noted that the list of optional mechanisms is not limiting, and that any other suitable mechanism may also be used, such as any one or more of the following: anti-rotation tabs or lugs; magnet polarity patterning to prevent misalignment; edge rims or lips to constrain lateral movement; and surface texturing (e.g., ribbing or grooves) to assist with tactile orientation or alignment confirmation. It is noted that in case loupes are detachably attached to moving loupes connectors (e.g., 1232, 1234), the selected detachable connection mechanism may optionally be such which does not require the demonstrator or the person to touch the head of the person, and possibly not even the ALMS.

[0131] Other mechanisms, which may be used in adjustable loupe carrying mechanisms that are not intended for rapid replacement of loupes, may be avoided in system 1200, e.g., by taking too long to replace (being too permanent), taking too long to move and adjust, taking too long to reach (e.g., requiring removal or moving of other components of the system), and so on. Such avoided mechanisms may include, for example: glue, complicated or delicate screws, threaded adjustment screws, locking dials with set screws, dovetail clamps requiring tool access, cam-lock mechanisms with adjustable preload, or shim-based spacing systems — all of which, while potentially precise, may hinder rapid repositioning or user-friendly interchangeability. While not necessarily so, all adjustment and / or detachment mechanisms of ALMS 1200 may be such which enable loupe attachment and detachment (and possibly also adjustment of loupe connection positions) without removing ALMS 1200 from the client's head, glue.

[0132] It is important to note that system 1200 may be specifically designed and optimized as a demonstration system, rather than as a long-term use device. This fundamental design philosophy allows for — and indeed necessitates — certain engineering trade-offs that would be unacceptable in a system intended for extended daily use by a user. For example, system 1200 may intentionally incorporate quick-release mechanisms (such as magnetic couplings with minimal retention force) that prioritize speed of loupe exchange over long-term security. Similarly, the first rigid track 1222 and second rigid track 1224 may be designed to be substantially longer than would be practical for daily use — extending well beyond the typical IPD range — to accommodate the widest possible variety of users without requiring track replacement or system reconfiguration, even at the expense of weight of the system, its aesthetics and / or comfort level. Such considerations may result in a system 1200 that may be heavier, bulkier, and / or less balanced than a personalized loupe system, that would be cumbersome during extended wear. Additionally, the multiple adjustment mechanisms, while enabling rapid customization for different users, add complexity and potential pressure points that a user would not tolerate for hours at a time during actual professional use. These design choices reflect a deliberate optimization for demonstration efficiency: enabling a single ALMS to effectively demonstrate multiple loupes to many (e.g., dozens) different people in rapid succession, even though such a system would be entirely impractical for a dentist, surgeon, or other professional to wear throughout their workday. In essence, in such implementations system 1200 sacrifices long-term wearability and day-to-day practicality in favor of demonstration versatility, adjustment speed, and the ability to provide an accurate — albeit brief — preview of how properly fitted loupes will perform for each individual user.

[0133] Figs. 16A-16D are different views of an example of system 1200 to which interchangeable loupes 1300 are connected, in accordance with the presently disclosed subject matter. It should be noted that system 1200 is just one of the systems in which method 1500 may be implemented.

[0134] Figs. 17A, 17B, and 18 provide different views of an example of system 1200 to which different interchangeable loupes 1300 are connected at different times, in accordance with the presently disclosed subject matter. The different interchangeable loupes 1300 (of which the angled loupes are denoted 1300A, 1300B, and 1300C, and the straight loupes are denoted 1300D, 1300E, and 1300F) may have different magnification levels, and / or may differ from one another in other ways, such as any combination of one or more of the following: a. Magnification power. b. Lens design (e.g., straight, prismatic, angled, Ergo, Refractives, Galilean, Keplerian, Rodenstock, aplanatic). c. Lens type (achromatic, aplanatic, etc.). d. Brand and price. e. Lens coating (anti -reflective, scratch -resistant, etc.). f. Lens material (glass, plastic, etc.). g. Focal length. h. Lens diameter. i. Body material (metal, plastic, etc.). j. Working distance. k. Depth of field. l. Eyepiece adjustments (pupillary distance, eye relief, etc.). m. Color correction. n. Weight. o. Ergonomic features (grip, balance, etc.).

[0135] This may be used, for example, in order to allow the individual wearing system 1200 to experience the difference between two or more types of loupes in a quick and efficient way. This may enable such user, for example, to determine the lenses they need in order to perform a specific action, such as repairing an electronic circuit or another electronic device, install a gem in a jewel, diagnose a patient, perform a medical procedure, and so on. For example, a single user may require different types of loupes for different uses.

[0136] Optionally, first rigid track 1222 and second rigid track 1224 can be connected to support structure 1210 at different positions along a superior-inferior axis of the support structure. As indicated above, this may be facilitated, for example, by vertical displacement mechanism 1240, by detaching and reattaching the rigid tracks at other positions (e.g., using magnets, screws, etc.), and so on. Another alternative for vertical displacement of the loupe-connectors (1232 and / or 1234) is discussed above, including utilizing multiple rigid tracks for each eye. While not necessarily so, vertical displacement mechanism 1240 may modify the vertical displacement between left-loupe connector 1232 and right-loupe connector 1234. While not necessarily so, vertical displacement mechanism 1240 may enable separate vertical displacement control of each out of left-loupe connector 1232 and right-loupe connector 1234. Yet another alternative for vertical displacement of the loupe-connectors (1232 and 1234) is to adjust the vertical displacement in which support structure 1210 is steadied against the head of the person (e.g., using adjustable straps, cushions, movable spacers, and so on). It is noted that any combination of the techniques discussed in this paragraph may be implemented, as well as any other technique. The term “superior-inferior axis” pertains to the human anatomy. Nevertheless, since system 1200 is usually designed to be worn in a predefined general orientation to the faces of the different people who may use it, in the context of the present disclosure the term “superior-inferior axis” is also extended to mean an axis of system 1200 parallel to the superior-inferior axis of a person, when system 1200 is properly worn by that person.

[0137] While not necessarily so, system 1200 may be designed to allow asymmetric positioning of left-loupe connector 1232 and of right-loupe connector 1234. That is, the different interchangeable loupes 1300 may be installed on system 1200 and system 1200 may be adjustable to provide a person with binocular vision via these loupes when any combination of the following is implemented: a. Left-loupe connector 1232 and of right-loupe connector 1234 are connected at different heights along the superior-inferior axis. For example, the difference in height may be more than 5mm, more than 10mm, etc. b. Left-loupe connector 1232 and of right-loupe connector 1234 may are connected at different distances from a plane of symmetry of system 1200. For example, the difference in distance may be more than 5mm, more than 10mm, etc. For example, the difference in distances may be more than 2%, more than 5%, more than 10%, etc. c. Left-loupe connector 1232 and of right-loupe connector 1234 may are positioned at different monocular pupillary distances, matching to the different monocular pupillary distances of a person (each monocular pupillary distance of the person representing the distance between the centers of one of the person’s pupils to a bridge of the nose of that person). For example, the difference in distance may be more than 5mm, more than 10mm, etc. For example, the difference in distances may be more than 5%, more than 10%, etc. d. A left-loupe angular orientation dictated by left-loupe connector 1232 is different than a right-loupe angular orientation dictated by right-loupe connector 1234. For example, the difference in angular orientation may be more than 1°, more than 3°, more than 5°, etc. For example, the difference in distances may be more than 5%, more than 10%, etc. e. The left-loupe angular orientation dictated by left-loupe connector 1232 is not symmetric about the plane of symmetry of system 1200 with respect to the right-loupe angular orientation dictated by right-loupe connector 1234. That orientation may be asymmetric about roll axis 1410, about yaw axis 1420, about pitch axis 1430, or about any combination of two or more thereof. For example, the difference in angular orientation may be more than 1°, more than 3°, more than 5°, etc. For example, the difference in distances may be more than 5%, more than 10%, etc.

[0138] Many mechanisms are known in the art - some of which were explicitly discussed above, which enable independent positioning and orientation of left-loupe connector 1232 and of right-loupe connector 1234, so as to enable for any one or more of the following positioning and / or orientation parameters to different from one another: (a) vertical distance (along axis y), (b) horizontal distance (along axis x), (c) depth (along axis z), (d) angular orientation about roll axis 1410, (e) angular orientation about yaw axis 1420, and (f) angular orientation about pitch axis 1430. Some nonlimiting examples of mechanisms which may be implemented in order to include such spatial positioning and orientation include, for example, any combination of one or more of the following: ball-and-socket joints, telescoping rods, hinged mechanisms, slotted tracks with locking features, rotational bearings, gimbals, articulated arms with multiple joints, linear actuators, swivel joints, rack and pinion systems, worm gears, universal joints, friction clamps, magnetic mounts, pneumatic cylinders, hydraulic pistons, scissor mechanisms, threaded rods with nuts, quick-release clamps, spring-loaded detents.

[0139] It is noted that the positioning and / or orienting may be confined by the structure of system 1200 or in any other way. For example, a shape of first rigid track 1222 may dictate a relationship between the positioning along the track (e.g., primarily but necessarily strictly along axis x) and the orientation about roll axis 1410 of left-loupe connector 1232 (and likewise for the shape of second rigid track 1224 and the positioning and orientation of right-loupe connector 1234). This may be implemented in system 1200, for example, in order to make sure that both loupes 1300 installed on left-loupe connector 1232 and on right-loupe connector 1234 are directed towards the same focal locus, e.g., in order to ensure that a high quality magnified binocular vision is provided to the person wearing system 1200. The focal locus may be, for example, a focal point or a focal sphere whose diameter — e.g., 5mm, 1cm, 2cm, 3cm, 5cm — may be determined based on the required accuracy, e.g., in response to the maximal loupe magnification level supported by the respective system 1200. Optionally, a shape of first rigid track 1222 and / or of second rigid track 1224 may be such that whenever the loupes 1300 are connected to the respective track via left-loupe connector 1232 and right-loupe connector 1234, respectively, both loupes point to the same focal locus as one another. Optionally, a shape of first rigid track 1222 and / or of second rigid track 1224 may be such that whenever the loupes 1300 are connected to the respective track via left-loupe connector 1232 and rightloupe connector 1234, respectively, both loupes point to the same focal locus whose position with respect to system 1200 is constant. For example, a shape of first rigid track 1222 and / or a shape of second rigid track 1224 may be an arc of a circle which is a base of a cone whose tip is in the local focus. It should be noted that mechanisms other than the shape of the track may be used to change on orientation of the loupe-connectors and / or of the loupes 1300. Few nonlimiting examples of such mechanisms which may be implemented in system 1200 for that purpose include: rotary cam mechanisms, follower mechanisms, crank-slider mechanisms, linkage mechanisms, worm gears, screw jacks, toggle mechanisms, helical gears, planetary gears, cycloidal drives, harmonic drives.

[0140] It should be noted that system 1200 may include additional components, such as any component used in the art for binocular loupes systems. For example, system 1200 may include an illumination (fixated and / or interchangeable), or a mounting to which such an illumination may be secured (either in a detachable fashion or not). For example, system 1200 may include a camera or another imaging sensor (fixated and / or interchangeable), or a mounting to which such a camera or other imaging sensor may be secured (either in a detachable fashion or not). For example, system 1200 may include a visor (fixated and / or interchangeable), or a mounting to which such a visor may be secured (either in a detachable fashion or not).

[0141] Figs. 100A and 100B illustrate examples of notations used in the disclosure for axes of displacement and axis of rotations, in accordance with examples of the presently disclosed subject matter.

[0142] Fig. 11 illustrates method 1500 for adjusting loupes of different magnification powers to a person, in accordance with examples of the presently disclosed subject matter. Referring to the examples discussed above with respect to the other drawings, method 1500 may optionally be implemented using system 1200. However, this is not necessarily so, and any other system having the components indicated with respect to method 1500 may be implemented; for example, method 1500 may be implemented in system which includes two loupe-connectors which both can be reversibly fixed to specific locations of a support structure that does not include track (e.g., using any of the connection techniques discussed above). Any detail, variation, option, possibility, or combination discussed above with respect to system 1200 may be implemented, mutatis mutandis, to method 1500 — even if the system used for executing method 1500 differs from system 1200 (e.g., as discussed above). Many such details are not repeated in the interest of concision. It is also noted that any detail, variation, option, possibility, or combination discussed with respect to method 1500 — or to any other method discussed in the present disclosure — may be implemented, mutatis mutandis, to system 1200. Many such details are not repeated in the interest of concision.

[0143] Method 1500 may be implemented by the person to which loupes are presented, and / or by any other one or more people, such as opticians, optometrists, ophthalmologists, sales representatives, and so on.

[0144] Step 1510 includes determining a right-eye loupe-position for a person based on a position of a right pupil of the person. Step 1520 includes determining a left-eye loupe position for the person, based on a position of a left pupil of the person. Steps 1510 and 1520 may be implemented, for example, using any one or more of the following instruments and / or techniques: a. Digital pupillometer. b. Mechanical pupillometer. c. Dedicated apps for pupillary distance measurement (e.g., for smartphone, laptop, etc.). d. Calipers (digital or analogue). e. Manual measurement with a ruler and mirror f. VR headset with built-in sensors g. 3D facial scanning technology h. Eye tracking systems

[0145] It is noted that optionally, steps 1510 and / or 1520 may be implemented or facilitated by dedicated equipment on the system used for the next steps, such as dedicated marker, ruler, movable sliders, adjustment gears, and so on.

[0146] The right-eye loupe-position and the left-eye loupe position may be determined using any suitable positioning information, which encompasses several critical optical and geometric parameters. For example, this loupe positioning information may include any one or more of the following parameters: (a) interpupillary distance (PD) — binocular and / or monocular measurements; (b) vertical positioning height, for each eyes or both; (c) horizontal offset from the optical center; (d) declination angle; (e) convergence angle - the inward rotation of each loupe for binocular alignment; (f) working distance; (g) vertex distance — the space between the back loupe surface and the cornea; (h) pantoscopic tilt - the forward inclination of the frame front; (i) decentration — the displacement needed to align the optical axis with the visual axis; and (j) prismatic values for maintaining orthophoric positioning. These parameters may be defined within any one or more coordinate systems, such as any one or more of the following: the adjustable loupes-mounting frame of reference (e.g., "glasses-frame reference system" frame of reference), e.g., using the geometric center or edges of each lens as origin points with x,y coordinates; the "face" frame of reference employs anatomical landmarks such as the nasion, inner / outer canthi, or the Frankfurt horizontal plane as reference points; a "global" or "world" coordinate system may use external spatial markers established during measurement; and the "optical" frame of reference aligns with the wearer's visual axes during normal working posture. The positioning information may be captured through direct measurement, photogrammetry, 3D scanning, calculated from the combination of frame geometry and facial measurements, or in any other suitable way, e.g., ensuring precise alignment for optimal visual performance and comfort.

[0147] Step 1530 includes: a. Detachably connecting a first loupe to an adjustable loupe mounting system (ALMS) at the right-eye loupe-position b. Detachably connecting a second loupe to the ALMS at the left-eye loupeposition, such that the first loupe and the second loupe point to a single focal locus, such as to present to the person magnified and focused images of the focal locus via the first loupe and via the second loupe when the person wears the ALMS.

[0148] While not necessarily so, the first loupe and the second loupe may have the same magnification level and / or other equal optical characteristics (e.g., working distance, field of view). However, this is not necessarily so, and loupes of different magnification (or otherwise differing loupes) may be used, e.g., in order to allow the person (e.g., user) to assess the differences between the different magnification levels (and / or other differences between the loupes, whether optical, mechanical, or other). If the first loupe and the second loupe are identical or at least sufficiently similar, a magnified binocular image may be presented to the person. During the time in which the two images are presented to the person, the person may take the time for assessment, possibly testing the loupes in different conditions (e.g., for different tasks, under different illumination conditions, magnifying different types of objects, and so on and so forth); however, this is not necessarily so.

[0149] It is noted that the connecting of step 1530 may be preceded by moving, adjusting, fitting, and / or fixing at least one component of the ALMS based on the determined lefteye loupe-position and / or based on the determined right-eye loupe-position. For example, this may include moving and / or reversibly fixating one or more loupe connectors of the ALMS (such as left-loupe connector 1232 and / or right-loupe connector 1234, for example). For example, this may include moving and / or reversibly fixating a stopper or a limiter, confining the locations and / or orientation in which loupes can be attached to the ALMS (for example, a loupe may be connected directly to a track of the ALMS, in a position and / or orientation determined, confined and / or configured using such a stopper or limiter reversibly fixed to the ALMS).

[0150] The time it takes to implement the connecting of step 1530 may vary depending, for example, on the connection mechanisms implemented in the ALMS. Exemplary times which may be reasonably achieved are less than 15 seconds per loupe, less than 10 seconds per loupe, and less than 5 second per loupe. The adjustment process (if part of method 1500, e.g., of step 1530) may vary depending, for example, on the adjustment mechanisms implemented in the ALMS, also may optionally also be relatively short. For example, the adjustment of the possible loupe positions for each eye of the person (e.g., by moving and fixing a loupe-connector of system 1200) may be less than 30 seconds per loupe, less than 15 seconds per loupe, and less than 5 second per loupe.

[0151] Method 1500 continues with at least one of step 1540 of disconnecting the first loupe from the ALMS and step 1550 of disconnecting the first loupe from the ALMS. Optionally, the disconnecting of the first loupe and / or of the second loupe does not modify an adjustment of the ALMS which was executed in step 1530, if applicable. However, this is not necessarily so; in some types of ALMS the re-adjustment of the locations of newly loupes based on the locations of the pupils may be very quick (e.g., adjusted by a computer-controlled mechanism), in which case such movement may be permitted.

[0152] The time it takes to implement the disconnecting of step 1540 and / or of step 1550 may vary depending, for example, on the connection mechanisms implemented in the ALMS. Exemplary times which may be reasonably achieved are less than 15 seconds per loupe, less than 10 seconds per loupe, and less than 5 second per loupe. Method 1500 continues with step 1560 of detachably connecting to the ALMS at the right-eye loupe-position a third loupe having a magnification power different than a magnification power of the first loupe, such that the third loupe and a fourth loupe concurrently connected to the ALMS at the left-eye loupe position point to the single focal locus such as to present to the person magnified and focused images of the focal locus via the third loupe and via the fourth loupe when the person wears the ALMS. If the second loupe was disconnected in step 1550, a different fourth loupe may be connected in its stead in step 1560. However, if step 1550 was not executed, the fourth loupe may simply be the second loupe that was not replaced. The third loupe may differ from the first loupe (as well as the fourth loupe from the second loupe, if different) in the magnification level (e.g., as suggested in Fig. 17B) and / or in any other parameter or characteristic, such as: magnification power, lens design, lens type (achromatic, aplanatic, etc.), brand and price, lens coating, lens material, focal length, lens diameter, body material, working distance, depth of field, eyepiece adjustments, color correction, weight, ergonomic features, and so on. The times of the connecting in step 1560 may optionally be similar to these of step 1530.

[0153] While not necessarily so, the third loupe and the fourth loupe may have the same magnification level and / or other equal optical characteristics (e.g., working distance, field of view). However, this is not necessarily so, and loupes of different magnification (or otherwise differing loupes) may be used, e.g., in order to allow the person (e.g., user) to assess the differences between the different magnification levels (and / or other differences between the loupes, whether optical, mechanical, or other). If the third loupe and the fourth loupe are identical or at least sufficiently similar, a magnified binocular image may be presented to the person. During the time in which the two images are presented to the person, the person may take the time for assessment, possibly testing the loupes in different conditions (e.g., for different tasks, under different illumination conditions, magnifying different types of objects, and so on and so forth); however, this is not necessarily so.

[0154] The disconnecting of one or more loupes and the connecting of one or more other loupes in the same locations and / or orientations may continue for other loupes, as required and / or desired by the person or for any other reasons. The relatively quick change times may enable a person to experience a wide variety of loupes and of loupes combinations in relatively short times. For example, implementing method 1500 using a version of ALMS developed by the inventor can facilitate experience of the user of at least four pairs of loupes (e.g., some six or seven pairs of loupes) — including the initial set-up time of the ALMS and the determining of the pupil positions — in less than 10 minutes.

[0155] It is noted that a single loupe may be repeatedly used in different such instances of method 1500. For example, the person may be presented in different steps of method 1500 with: (a) a pair of loupes of a first magnification level (e.g., x5), (b) a pair of loupes of a second magnification level (e.g., x7.5 orx10), (c) a pair of unmatched magnification levels, including one loupe of the first magnification level and another loupe of the second magnification level. While option (c) might not provide a comfortable binocular vision experience to the person, it may help the person to select between the first magnification level and the second magnification level (or ask for loupes of another — e.g., intermediate — magnification level). For example, the person may alternately close a single eye at a time, thus experiencing the differences between the two loupes more vividly (e.g., the different magnification levels).

[0156] Method 1500 may optionally continue with step 1570 of manufacturing for the person a loupe-system (e.g., a TTL loupe glasses, a flip-up loupe system, etc.), based on evaluation of the different types of loupes tried in the previous steps.

[0157] Various optional characteristics of method 1500, e.g., ease of execution, speed of execution, user comfort, and so on, are also very appealing for implementation of method 1500 sequentially to a group of people having different IPS, using a single ALMS and a set of loupes - which may optionally be repeatedly used for different people (e.g., all belonging to a loupes demonstration set of an optician, an optometrist, an ophthalmologist, a sales representative, etc.).

[0158] Fig. 12 illustrates method 1600 for adjusting loupes of different magnification powers to multiple people, in accordance with examples of the presently disclosed subject matter. Referring to the examples discussed above with respect to the other drawings, method 1600 may optionally be implemented using system 1200. However, this is not necessarily so, and any other system having the components indicated with respect to method 1600 may be implemented (e.g., as discussed above with respect to method 1500). Any detail, variation, option, possibility, or combination discussed above with respect to system 1200 may be implemented, mutatis mutandis, to method 1600 — even if the system used for executing method 1600 differs from system 1200 (e.g., as discussed above). Many such details are not repeated in the interest of concision. It is also noted that any detail, variation, option, possibility, or combination discussed with respect to method 1600 — or to any other method discussed in the present disclosure — may be implemented, mutatis mutandis, to system 1200. Many such details are not repeated in the interest of concision.

[0159] Method 1600 may be executed to adjust loupes of different magnification powers to any number of people using a single ALMS, depending on the scenario, on the specific type of ALMS used, on the operational requirements, and so on. For example, method 1600 may be used to demonstrate loupes of different magnification levels using a single ALMS to people with different IPDs and different magnification requirements, e.g., one after the other to people queuing for a demonstrations, for groups of 5 or more people, 10 or more people, 16, or more people, 50 or more people, etc. The duration it takes for each person to try on the different loupes depends mostly on the number of loupes configuration that person wants to try, on the duration that the person needs to feel each configuration, and on the different questions that person may want to ask (e.g., regarding cost, warranty, etc.); the transition durations required for replacing loupes for that person to try are usually not a greatly limiting factor (e.g., it may take 5-10 seconds to replace a pair of loupes with another pair of a different magnification power, and the person may take 16-60 second to try them out). For example, method 1600 may be used to demonstrate multiple pairs of loupes of different magnification powers to each out of 5- 10 people in an hour, using a single ALMS.

[0160] Method 1600 starts with step 1610 of determining for a first person a loupe position for each of the eyes of the person (i.e., left eye, right eye), based on a position of the person’s pupil. For example, step 1610 may include executing steps 1510 and / or 1520 for the first person.

[0161] Step 1610 is followed by step 1620 of detachably connecting to an adjustable loupe mounting system (ALMS) a first pair of loupes at the determined loupe-positions, such that the pair of loupes point to a single focal locus, thereby presenting to the person a magnified binocular image of the focal locus via the loupes of the first pair. For example, step 1620 may include including executing step 1530 for the first person.

[0162] Method 1600 continues with step 1630 that includes changing the pair of loupes connected to the ALMS at the determined loupe-positions — Using the same determined loupe-positions — to another pair of loupes pointing to a common focal locus, thereby presenting to the person magnified and focused images of the common focal locus via the loupes of the other pair. Step 1630 may include, for example, executing for the first person steps 1540 and / or 1550, and step 1560. The other pair of loupes may optionally include one of the previously installed loupes, or both loupes may be replaced. Step 1630 may optionally be repeated for different pairs of loupes. Optionally, step 1630 may conclude with selecting and / or otherwise matching loupes for the person (e.g., selecting magnification levels, or other parameters).

[0163] Step 1640 of method 1600 includes repeating steps 1610, 1620, and 1630 for at least one other person, using the same ALMS, and possibly also using at least one loupe used for another person. Step 1640 may include modifying the adjustment of the ALMS before presenting loupe combination for such other person (e.g., moving the loupe connectors to other positions).

[0164] Method 1600 may optionally continue with step 1650 of manufacturing for the different people of the previous stages different loupe-systems (e.g., a TTL loupe glasses, flip-up loupe systems, etc.), based on evaluation of the different types of loupes tried in the previous steps.

[0165] Fig. 13 illustrates method 1700 for adjusting loupes of different magnification powers to a person, in accordance with examples of the presently disclosed subject matter. Referring to the examples discussed above with respect to the other drawings, method 1500 may optionally be implemented using system 1200. However, this is not necessarily so, and any other system having the components indicated with respect to method 1700 may be implemented (e.g., as discussed above with respect to method 1500). Any detail, variation, option, possibility, or combination discussed above with respect to system 1200 may be implemented, mutatis mutandis, to method 1700 — even if the system used for executing method 1700 differs from system 1200 (e.g., as discussed above). Many such details are not repeated in the interest of concision. It is also noted that any detail, variation, option, possibility, or combination discussed with respect to method 1700 — or to any other method discussed in the present disclosure — may be implemented, mutatis mutandis, to system 1200. Many such details are not repeated in the interest of concision.

[0166] Step 1710 of method 1700 includes analyzing a photo and / or a video of a person wearing a reference frame to measure PD and optionally other position and / or orientation parameters. Step 1710 may include capturing one or more photos and / or one or more images for analysis. For example, the reference frame may be the reference frame of the “Master Loupes™” by Admetec Solutions LTD.). For example, the analyzing may be executed using the “FrameFit™” application of Admetec Solutions LTD). Referring to method 1500, step 1710 may include executing steps 1510 and / or 1520.

[0167] Step 1720 of method 1700 includes connecting a first pair of loupes to the adjustable loupe mounting system (ALMS) (e.g., “Master Loupes™” by Admetec LTD.). While not necessarily so, the first pair may include loupes with a relatively low magnification power (e.g., 3 x magnification power). Referring to method 1600, step 1720 may include executing step 1530.

[0168] Step 1730 includes aligning the ALMS according to the parameters determined in step 1710 (e.g., PD and / or height). It is noted that the aligning of step 1720 may be executed before or after the connection of loupes to the ALMS of step 1720. Referring to method 1600, step 1730 may include executing step 1620.

[0169] Step 1740 of method 1700 includes placing the ALMS on the person (especially, in a suitable position, as facilitated by the support structure). Step 1740 may optionally further include adjusting the ALMS to the person, if needed. For example, if height of the loupes with respect to the support structure (e.g., along axis 1420) was not executed in step 1730, it may be executed when or after the person tried on the ALMS. Additionally or instead, some parameters (e.g., IPD, height) may require readjustments to better suit the preference of the person, the physiology of the person, and so on.

[0170] It is noted that the order in which steps 1720, 1730, and 1740 are executed may be determined according to various considerations, e.g., depending on the design of the ALMS, preferences of the person making the adjustment, preferences of the person for which the adjustments are made (wearer of the ALMS), and so on. For example, in some cases, the aligning of the ALMS in step 1730 according to the parameters determined in step 1710 may be executed before the first loupes are connected to the ALMS in step 1720. For example, the connected of the first pair of loupes to the ALMS in step 1720 may be executed after the ALMS is already positioned on the person, in step 1740.

[0171] Step 1750 Continually replacing loupes, differing in one parameter or more from one another (e.g., differing in magnification power), until the person decides on the loupes characteristic most suitable for the person. For example, the person may be provided with 4.5x, 6x, 7.5x, and 10x pairs of loupes. Referring to method 1600, step 1750 may include executing step 1630.

[0172] Optional step 1760 includes proceeding with the selling process and / or manufacturing process as usual (e.g., in any suitable way known in the art). Method 1700 may then be repeated for different people using the same ALMS. Optionally, such repeated instances of method 1700 for different people using a single ALMS may be executed to adjust loupes of different magnification powers to any number of people using a single ALMS, depending on the scenario, on the specific type of ALMS used, on the operational requirements, and so on. For example, method 1700 may be used to demonstrate loupes of different magnification levels using a single ALMS to people with different IPDs and different magnification requirements, e.g., one after the other to people queuing for a demonstration, for groups of 5 or more people, 10 or more people, 20, or more people, 50 or more people, etc. The duration it takes for each person to try on the different loupes depends mostly on the number of loupes configuration that person wants to try, on the duration that the person needs to feel each configuration, and on the different questions that person may want to ask (e.g., regarding cost, warranty, etc.); the transition durations required for replacing loupes for that person to try are usually not a greatly limiting factor (e.g., it may take 5-10 seconds to replace a pair of loupes with another pair of a different magnification power, and the person may take 20-60 second to try them out). For example, method 1700 may be used to demonstrate multiple pairs of loupes of different magnification powers to each out of 5-10 people in an hour, using a single ALMS.

[0173] Referring to system 1200, to method 1500, and to method 1600, optionally a pair of loupes may be connected to the system (e.g., system 1200, the ALMS) such that the focal locus is positioned off (e.g., below) an anatomical line of sight of the person. For example, the focal locus may be positioned more than 15°, 30°, or 45° degrees below an anatomical line of sight of the person. For example, the focal locus may be positioned between 1°-15°, 15°-30°, or 30°-45° degrees below an anatomical line of sight of the person. The term "anatomical line of sight" within the context of the present disclosure pertains to an imaginary straight line that begins at the midpoint between the eyes and extends anteriorly in a direction in which the head of the person is facing.

[0174] Referring to system 1200, to method 1500, and to method 1600, optionally for one or more or all of the pairs of loupes connected to the system (e.g., system 1200, the ALMS), the respective pair of loupes may be concurrently connected to the system such that an orientation of the left loupe is a rightward orientation, and an orientation of the right loupe is a leftward orientation. Referring to method 1500 and to method 1600, optionally the determining of the right-eye loupe-position is followed by moving a first track-mounted adapter of the ALMS to the right-eye loupe-position, wherein the detachably connecting of the first loupe to the ALMS includes detachably connecting the first loupe to the first trackmounted adapter when the first track-mounted adapter is at the right-eye loupe-position, wherein the detachably connecting of the third loupe to the ALMS includes detachably connecting the third loupe to the first track-mounted adapter when the first track-mounted adapter is still at the right-eye loupe-position (i.e., without being moved in between).

[0175] Referring to system 1200, to method 1500, and to method 1600, optionally a pair of loupes concurrently presented to the person may include one straight loupe and one angled loupe. Referring to system 1200, to method 1500, and to method 1600, optionally two loupes that are presented to the person at different times may include one straight loupe and one angled loupe.

[0176] Referring to system 1200, to method 1500, and to method 1600, optionally one or more of the loupes may be brought to a short distance from the eye (e.g., less than 5mm, less than 10mm, e.g., less than a distance of a lens of glasses of that person). This may facilitate demonstration of loupes of large magnification levels.

[0177] Referring to system 1200, to method 1500, and to method 1600, optionally the system (e.g., system 1200, the AMLS) may include measures which can be read at the different adjustment setting, from which IPD and / or other parameters of the adjustment may be read, to be used in the manufacturing of the final loupe system for that person.

[0178] Referring to system 1200, to method 1500, and to method 1600, optionally the working distance of the loupes may be adjusted by adjusting the respective system (e.g., system 1200, the AMLS) and / or by using dedicated loupes. However this is not necessarily so. For example, while different people require different working distances for their work (e.g., between 40-60cm), many a time an average working distance (e.g., of about 50cm) may be used for the purpose of the respective method or system. That working distance may be required in some cases to determine the curvature of the first rigid track and / or of the second rigid track.

[0179] Fig. 20 illustrates method 2000 for adjusting loupes of different magnification powers to multiple people, in accordance with examples of the presently disclosed subject matter. Referring to the examples discussed above with respect to the other drawings, method 2000 may optionally be implemented using system 1200. However, this is not necessarily so, and any other system having the components indicated with respect to method 2000 may be implemented (e.g., as discussed above with respect to method 1500). Any detail, variation, option, possibility, or combination discussed above with respect to system 1200 may be implemented, mutatis mutandis, to method 2000 — even if the system used for executing method 2000 differs from system 1200 (e.g., as discussed above). Many such details are not repeated in the interest of concision. It is also noted that any detail, variation, option, possibility, or combination discussed with respect to method 2000 — or to any other method discussed in the present disclosure — may be implemented, mutatis mutandis, to system 1200. Many such details are not repeated in the interest of concision.

[0180] Method 2000 may be executed to adjust loupes of different magnification powers to any number of people using a single ALMS, depending on the scenario, on the specific type of ALMS used, on the operational requirements, and so on. For example, method 2000 may be used to demonstrate loupes of different magnification levels using a single ALMS to people with different IPDs and different magnification requirements, e.g., one after the other to people queuing for a demonstration, for groups of 5 or more people, 10 or more people, 20, or more people, 50 or more people, etc. The duration it takes for each person to try on the different loupes depends mostly on the number of loupes configuration that person wants to try, on the duration that the person needs to feel each configuration, and on the different questions that person may want to ask (e.g., regarding cost, warranty, etc.); the transition durations required for replacing loupes for that person to try are usually not a greatly limiting factor (e.g., it may take 5-10 seconds to replace a pair of loupes with another pair of a different magnification power, and the person may take 20-60 second to try them out). For example, method 2000 may be used to demonstrate multiple pairs of loupes of different magnification powers to each out of 5- 10 people in an hour, using a single ALMS.

[0181] This rapidness of the demonstration method of method 2000 compared to methods currently used in many such demonstration scenarios (e.g., international conventions, onsite demonstrations) is facilitated both by specific design choices of the ALMS and by the entire demonstration approach. For example, method 2000 may be executed using an ALMS in which following an initial adjustment of the ALMS to a person, the adjustment is secure enough and the detachable loupe-attachment mechanisms are both quick enough and sufficiently low-effort to enable quick detachment and attachment of loupes, possibly without anyone needing to touch the head of the person or even the ALMS (e.g., using magnets, e.g., with automatic alignment mechanisms like magnets, alignments dowels or pins, etc.).

[0182] Method 2000 starts with step 2010 of determining for a first person a loupe position for each of the eyes of the person (i.e., left eye, right eye), based on a position of the person’s pupil. For example, step 2010 may include executing steps 1510 and / or 1520 for the first person. The determining of step 2010 may include determining monocular and / or binocular PD, monocular and / or binocular height positioning, and any other suitable parameter related to the loupe-positions for the first person.

[0183] For example, the determining of step 2010 may include determining the loupeposition for each of the eyes of the first person using a dedicated app for pupillary distance measurement or for a more general loupe positioning measurements, e.g., such as a ones used by for smartphone, laptop, etc.). Step 2010 may optionally include analyzing a photo and / or a video of the first person wearing a reference frame (which may or may not be the ALMS used in later steps of method 2000), to measure PD and optionally other position and / or orientation parameters. Step 2010 may include capturing one or more photos and / or one or more images for analysis. For example, the reference frame may be the reference frame of the “Master Loupes™” by Admetec Solutions LTD.). For example, the analyzing may be executed using the “FrameFit™” application of Admetec Solutions LTD). Referring to method 1500, step 2010 may include executing steps 1510 and / or 1520. By way of example, step 2010 may take 1-2 minutes, or less (e.g., about 30 seconds, between 20-40 seconds).

[0184] Step 2010 may be followed by step 2020 of moving movable parts of the ALMS and securing the movable parts in new positions, to align the ALMS according to the parameters determined in step 2010 (e.g., PD and / or height). Referring to method 1600, step 2020 may include executing step 1620. The aligning of step 2020 can be very quick, e.g., under 30 seconds, or even far less (e.g., about 10 seconds, between 5-15 seconds). The fast aligning times may be facilitated by dedicated design of adjustment mechanisms of the ASML to support adjustments procedures that are fast, accurate, stable (at least for the duration of the demonstration of the multiple loupes, possibly much longer), and easily detachable, e.g., as discussed in greater detail about with respect to ASML 1200. Also, other design factors of the ASML (e.g., the curvature and angle of the first rigid track and / or of the second rigid track) may also facilitate fast replacement of loupes while providing a binocular vision via the two loupes for each of the different people, without need to readjust between demonstrations of different loupes to the same person.

[0185] Method 2000 continues with step 2030 of detachably connecting to the adjustable loupe mounting system (ALMS) a first pair of loupes at the determined loupe-positions, such that the pair of loupes point to a single focal locus, thereby presenting to the person a magnified binocular image of the focal locus via the loupes of the first pair. For example, step 2020 may include including executing step 1530 for the first person. It is noted, that optionally, step 2030 may include making minor adjustment to the alignments of the ALMS to the person, e.g., based on feedback of the person, such as based on phenomena such as the appearance of black crescents at the periphery of the field of view, vignetting or shadowing (suggesting misalignment with the exit pupil), double vision (indicative of improper interpupillary distance or collimation), or user-reported eye strain or discomfort (which may arise from suboptimal diopter or focus settings). Such feedback may be used to iteratively refine the mechanical or optical alignment to achieve optimal visual performance and user comfort. It is noted that such corrections are usually required only for the first pair of loupes, and that the setting of positioning at the end of step 2030 is final for that person, not requiring additional adjustment for other loupes of different magnification levels. This is facilitated by the design of the ASML (e.g., by the curvature of the rigid tracks). Preferably, step 2030 takes less than a minute (e.g., less than 30 seconds), including the minor adjustments.

[0186] Method 2000 continues with one or more instances of step 2040, each of the instances including changing the pair of loupes connected to the ALMS at the determined loupe-positions — using the same determined loupe-positions — to another pair of loupes pointing to a common focal locus, thereby presenting to the first person a magnified and focused image of the common focal locus via the loupes of the newly connected pair. The replacement of the loupes at step 2040 may take a very short time, e.g., under 15 seconds, under 10 seconds, under 5 seconds. For example, step 2040 may include pulling and / or rotating each loupe, to detach the magnetic coupling between the respective loupe and the ALMS, and bringing the magnetic coupling of another loupe next to the loupe positioning location, trusting the self-directing magnetic mechanism to align and hold the loupe at the correct location and orientation (e.g., using any of the mechanisms discussed above with respect to ALMS 1200). As aforementioned, during the different instances of step 2040, no further adjustment of the loupe positioning is usually required. Furthermore, even if additional fine-tuning of the positioning is requested by the first person for any reason, its duration is very short, as discussed above.

[0187] It should be noted that while not necessarily so, all instances of step 2040 may optionally be executed without removing the ALMS from the first person’s head. This facilitates both efficiency and comfort, as the person can maintain their viewing posture and head position throughout the demonstration process. Moreover, the detachment and attachment of loupes during step 2040 may optionally be accomplished without the demonstrator or the first person even touching the ALMS itself — only handling the loupes. This touch-free replacement capability is enabled by the specific design of the detachable connection mechanisms (e.g., magnetic coupling with self-alignment features), which allow the demonstrator to simply pull away one loupe and bring another loupe close to the connection point, whereupon the alignment mechanisms automatically guide the loupe into the correct position and orientation. Such an approach minimizes any discomfort or disruption to the person's experience, maintains the hygiene of the demonstration process, and significantly reduces the time required for each loupe replacement.

[0188] It should be noted that the design of the ASML may be such that in each instance of step 2040, the first person will experience exactly how the TTL loupes glasses they will ultimately use (custom manufactured for their selected loupes and facial features) will feel in terms of binocular vision quality and comfort. This is in contrast to many other demonstration systems in which the IPDs are set at predefined positions — in such systems, many people will see an imperfect image, experiencing phenomena such as inability to achieve proper binocular fusion (i.e., not being able to see with both eyes at once), double vision, or peripheral darkness, particularly when their IPDs are asymmetric or fall between the predetermined settings. The individualized adjustment capability of the ALMS ensures that each person, regardless of their unique facial anatomy or asymmetric pupillary distances, can experience the full quality of magnified binocular vision that will be replicated in their custom-manufactured loupe system.

[0189] Each instance of step 2040 may include, for example, executing for the first person steps 1540 and / or 1550, and step 1560. The selected pair of loupes may optionally include one of the previously installed loupes, or both loupes may be replaced.

[0190] It is noted that the quick loupe replacement times (e.g., typically under 10 seconds per pair) combined with the flexibility in adjustment for each person's unique anatomical features mean that any person may try out significantly more combinations of loupes than would be practical with prior art systems. This advantage is particularly pronounced for individuals with unique facial characteristics, such as asymmetric IPDs, unusually wide or narrow IPDs (e.g., below 50mm or above 75mm), significant differences in monocular pupillary distances, or requirements for non-standard vertical positioning. In prior art demonstration systems, such individuals often find limited options, as manufacturers often stock demo frames only for the most common IPD ranges and symmetric configurations. Furthermore, the inventory limitations of prior art systems mean that even if a frame with the appropriate IPD exists, it may not be available in all magnification levels. In contrast, the present ALMS enables any person — regardless of their unique anatomical parameters — to experience the full range of available magnification powers (e.g., from 2.5* to 10x or higher) with properly aligned binocular vision, in full field of view and full depth, all within a single demonstration session. This comprehensive demonstration capability not only improves the person's ability to make an informed decision but also ensures that individuals with less common anatomical features receive the same quality of demonstration experience as those with more typical measurements.

[0191] Method 2000 may optionally continue with step 2050 of selecting and / or otherwise matching one or more pairs of loupes for the first person (e.g., selecting magnification levels, or other parameters). Step 2050 may also include recording of positioning parameters determined for the first person (e.g., PD, height).

[0192] Method 2000 may optionally continue with step 2060 of manufacturing for the first person at least one loupe-system (e.g., a TTL loupe glasses, flip-up loupe systems, etc.), based on evaluation of the different types of loupes tried in the previous steps. Alternatively or additionally, step 2060 may include any other form of proceeding with the selling process and / or manufacturing process as usual (e.g., in any suitable way known in the art).

[0193] Fig. 21 illustrates method 2001 for adjusting loupes of different magnification powers to multiple people, in accordance with examples of the presently disclosed subject matter. Referring to the examples discussed above with respect to the other drawings, method 2001 may optionally be implemented using system 1200. However, this is not necessarily so, and any other system having the components indicated with respect to method 2001 may be implemented (e.g., as discussed above with respect to method 1500). Any detail, variation, option, possibility, or combination discussed above with respect to system 1200 may be implemented, mutatis mutandis, to method 2001 — even if the system used for executing method 2001 differs from system 1200 (e.g., as discussed above). Many such details are not repeated in the interest of concision. It is also noted that any detail, variation, option, possibility, or combination discussed with respect to method 2001 — or to any other method discussed in the present disclosure — may be implemented, mutatis mutandis, to system 1200. Many such details are not repeated in the interest of concision. Method 2001 includes implementing the steps of method 2000 for a plurality of N people, using a single ALMS. For example, N may be between 4 and 10. For example, N may be between 10 and 20. For example, N may be between 20 and 50. For example, N may be between 50 and 100. For example, N may be greater than 100. While not necessarily so, method 2001 may include executing the steps of method 2000 for the N people during a single day (e.g., for each of the aforementioned ranges of numbers of people, N). For example, method 2001 may include executing the steps of method 2000 for the N people by a single demonstrator (e.g., sales representative), e.g., during a single day (e.g., for each of the aforementioned ranges of numbers of people, N).

[0194] Optionally, instances of step 2010 for different people (e.g., 2010(i) and 2010(j), l<i,j<N) may include determining loupe-positions for these two or more people which are less than 1mm apart, or less than 2mm apart (e.g., for a corresponding eye of the different people, e.g., left eye), and the corresponding instances of step 2020 for this different people (e.g., 2020(i) and 2020(j)) may include aligning a single loupe connector of the ALMS (e.g., connectors 1232 and / or 1234) to positions that are less than 1mm (or less than 2mm) apart, thus enabling a much higher granularity of PDs (or more generally - much higher granularity of facial features adaptability) than many prior art demonstration systems intended for a plurality of people, and not intended as a long-term use systems.

[0195] Optionally, method 2001 may include demonstrating the same pairs of loupes to different people who has different loupe-positions determined for them, throughout a demonstration venue. These people may be served directly one after the other, or with other people served between them. For example, at a professional convention or exhibition, a single demonstrator using a single ALMS may move between different booths, rooms, or demonstration areas, carrying the same set of demonstration loupes. The rapid adjustment capability of the ALMS — requiring only 20-40 seconds to determine positioning parameters and 5-20 seconds to align the system — enables efficient demonstrations even when moving between locations. This mobility is particularly advantageous compared to prior art systems that might require multiple pre-configured frames for different IPDs, making transportation between locations cumbersome. The demonstrator can efficiently serve people at different locations without the need to carry heavy inventory or spend excessive time on setup at each new location.

[0196] Optionally, method 2001 may include demonstrating different pairs of loupes to different people at different locations, adapting the demonstration to the specific needs or interests at each location. For example, at a medical conference, the demonstrator might emphasize higher magnification loupes (e.g., 7.5* to 10x) when demonstrating to neurosurgeons in one area, while focusing on mid-range magnifications (e.g., 3* to 5*) when demonstrating to general dentists in another area. The flexibility of the ALMS to quickly switch between any combination of loupes — without requiring different frames or systems — enables this targeted approach. Each person at each location still receives a fully customized fitting experience, with the ALMS adjusted to their unique anatomical parameters, regardless of which subset of loupes is being emphasized at that particular location.

[0197] Optionally, method 2001 may include providing reversed pairs of different loupes for different people, enabling unique comparison experiences. For example, after demonstrating a 5* loupe for the right eye and a 7.5* loupe for the left eye to one person, the demonstrator might reverse this configuration for the next person — placing the 7.5* loupe on the right eye and the 5* loupe on the left eye. This reversal capability, which takes mere seconds with the ALMS's quick-release mechanisms, can help address individual eye dominance preferences or provide different comparison experiences. Such flexibility would be impractical with prior art systems that would require maintaining separate pre-configured frames for each possible combination and reversal.

[0198] Optionally, method 2001 may include returning to demonstrate additional loupes to the same person after demonstrating to other people in between, without requiring remeasurement, and without a lengthy re-adjustment process which may discourage such behavior. For example, person i might initially try magnifications from 3* to 5*, then step aside while persons j, k, and 1 each receive their own demonstrations with the ALMS adjusted to their unique parameters. When person i returns — perhaps after considering their initial experience or discussing with colleagues — the demonstrator can quickly readjust the ALMS to person i's previously determined positioning parameters (which may have been recorded in step 2010(i) and / or in step 2050(i)) and demonstrate higher magnifications like 7.5* or 10x. This "return visit" capability, facilitated by the recorded parameters and rapid adjustment mechanisms, enables a more thoughtful decisionmaking process while maintaining demonstration efficiency for multiple people. While the embodiments described above are provided as examples, it should be understood that various modifications and substitutions may be made without departing from the scope of the present disclosure as defined in the appended claims.

Claims

CLAIMS:

1. A prismatic deflection loupe comprising: an ocular optics at a fixed ocular position at a proximal portion of a loupe body; a prism accommodated at a fixed position within the loupe body, the prism being configured as a single-element unit operable to deflect an image embedded in an input light field, propagating along an input path from a given fixed objective position of a given entry optics at a distal portion of the loupe body, and to direct said input light field to propagate along an optical path towards the ocular optics, such that said optical path being substantially parallel to an optical axis of the ocular optics and forms a predetermined angle with said input path; an adjustable magnification module accommodated upstream of the ocular optics with respect to a direction of propagation of the input light field through the loupe, the adjustable magnification module comprising at least first and second spaced-apart lenses having substantially parallel optical axes, and an adjustment mechanism configured for moving said at least first and second lenses with respect to each other thereby controllably modifying a distance between said at least first and second lenses and modifying lateral configurations of the at least first and second lenses to modify a magnification factor of the prismatic deflection loupe within a predetermined magnification range, wherein said moving of the at least first and second lenses through successive lateral configurations is such that movement of one of the at least first and second lenses is a non-linear function of movement of at least one other of the at least first and second lenses, while maintaining a given working distance of the loupe defined by the given entry optics at said given fixed location.

2. The prismatic deflection loupe according to claim 1, wherein the adjustable magnification module is accommodated in said optical path between the prism and the ocular optics, such that the optical axes of said at least first and second lenses are substantially parallel to the optical path, providing that the deflected input light field successively interacts with the first and second lenses while propagating towards the ocular optics.

3. The prismatic deflection loupe according to claim 1, wherein the adjustable magnification module is accommodated in the input path upstream of the prism withrespect to a direction of propagation of input light, such that the input light field successively interacts with the first and second lenses while propagating towards the prism.

4. The prismatic deflection loupe according to claim 1, wherein the entry optics is mounted at a fixed objective position at the distal portion of the loupe body.

5. The prismatic deflection loupe according to claim 1, wherein the entry optics is removably mountable on said loupe body to be at the fixed objective position at the distal portion of the loupe body, thereby enabling replacement of the entry optics to define a different value of the magnification range, while maintaining said working distance of the loupe.

6. The prismatic deflection loupe according to claim 1, wherein said adjustment mechanism is configured and operable for controllably modifying the distance between the first and second lenses by controlling a concurrent movement of the first and second lenses in opposite directions along the optical axes of the lenses.

7. The prismatic deflection loupe according to claim 1, wherein said predetermined angle between the optical path and the input path is about 20-45 degrees.

8. The prismatic deflection loupe according to claim 1, wherein said adjustment mechanism comprises a position controller connected to a barrel cam assembly for transferring a rotational movement of the position controller between an array of K discrete circumferential locations (K>2) of the position controller into a respective array of K different lateral configurations of the first and second lenses along said optical axes, said array of K different lateral configurations corresponding to an array of K magnification factors, {Mk}, respectively, of the loupe.

9. The prismatic deflection loupe according to claim 1, wherein one of the first and second lenses is a positive lens and the other is a negative lens.

10. The prismatic deflection loupe according to claim 8, wherein said first lens is a negative lens, and the second lens is a positive lens.

11. The prismatic deflection loupe according to claim 9, wherein a focal length of the positive lens is equal to an absolute value of a focal length of the negative lens.

12. The prismatic deflection loupe according to claim 9, wherein a focal length of the positive lens is different from an absolute value of a focal length of the negative lens.

13. The prismatic deflection loupe according to claim 1, wherein said adjustment mechanism is configured and operable to control said concurrent movement of the firstand second lenses such that a shift between each two successive lateral configurations of the first and second lenses corresponds to movement of the first and second lenses by different first and second distances AXi and AX2, respectively.

14. The prismatic deflection loupe according to claim 1, wherein said adjustment mechanism is configured and operable to provide that said concurrent movement of the first and second lenses between different lateral configurations corresponding to the different magnification factors satisfies the following condition: a ratio Ri, (AXi(11+2))i / AXi(11+1))i, between a movement distance (AXi(11+2))i of the first lens resulting from a shift between three successive lateral configurations / z; (i+1); (i+2)] and a movement distance AXi(11+1))i of the first lens resulting from a shift between two successive lateral configurations [i; (i+1)], is different from a ratio R2, (AXI(1’1+2))2 / AXI(1’1+1))2, between a movement distance (AXI(11+2))2 of the second lens resulting from the shift between three successive lateral configurations / z; (i+1); (i+2)] and a movement distance AXI(M+1))2 of the second lens resulting from the shift between two successive lateral configurations [i; (i+1)].

15. The prismatic deflection loupe according to claim 14, wherein the movement of the first and second lenses is such that the ratio Ri differs from the ratio R2 by a factor of at least 5%.

16. The prismatic deflection loupe according to claim 1, wherein the adjustable magnification module and the adjustment mechanism are configured such that, for given properties of the entry optics and the ocular optics, said modifying of the lateral configurations of the first and second lenses is provided by varying the distance between the first and second lenses through at least two different discrete positions providing at least two different modification factors..

17. The prismatic deflection loupe according to claim 1, further comprising a duplex achromatic lens positioned between the second lens and the ocular optics.

18. The prismatic deflection loupe according to claim 1, wherein the ocular optics comprises a collimator lens.

19. The prismatic deflection loupe according to claim 1, wherein the ocular optics comprises an optical lens having prescribed vision correction properties.

20. The prismatic deflection loupe according to claim 1, wherein said loupe body is configured to be mountable on a glasses by attachment of the loupe body, by its proximal end, to an opening in a lens of the glasses.

21. A prismatic deflection loupe comprising: an ocular optics at a fixed ocular position at a proximal portion of a loupe body; a prism accommodated at a fixed position within the loupe body, the prism being configured as a single-element unit operable to deflect an image embedded in an input light field, propagating along an input path from a given fixed objective position of a given entry optics at a distal portion of the loupe body, and to direct said input light field to propagate along an optical path towards the ocular optics, such that said optical path being substantially parallel to an optical axis of the ocular optics and forms a predetermined angle with said input path; and an adjustable magnification module accommodated between the prism and the ocular optics, the adjustable magnification module comprising at least first and second spaced-apart lenses having substantially parallel optical axes, and an adjustment mechanism configured for moving said at least first and second lenses with respect to each other thereby controllably modifying a distance between said at least first and second lenses and modifying lateral configurations of the at least first and second lenses to modify a magnification factor of the prismatic deflection loupe within a predetermined magnification range, wherein said moving of the at least first and second lenses through successive lateral configurations is such that movement of one of the at least first and second lenses is a non-linear function of movement of at least one other of the at least first and second lenses, while maintaining a given working distance of the loupe defined by the given entry optics at said given fixed location.

22. A prismatic deflection loupe comprising: an ocular optics at a fixed ocular position at a proximal portion of a loupe body; a prism accommodated at a fixed position within the loupe body, the prism being configured as a single-element unit operable to deflect an image embedded in an input light field, propagating along an input path from a given fixed objective position of a given entry optics at a distal portion of the loupe body, and to direct said input light field to propagate along an optical path towards the ocular optics, such that said optical path being substantially parallel to an optical axis of the ocular optics and forms a predetermined angle with said input path;an adjustable magnification module accommodated in the input path upstream of the prism with respect to a direction of propagation of input light field, the adjustable magnification module comprising at least first and second spaced-apart lenses having substantially parallel optical axes, and an adjustment mechanism configured for moving said at least first and second lenses with respect to each other thereby controllably modifying a distance between said at least first and second lenses and modifying lateral configurations of the at least first and second lenses to modify a magnification factor of the prismatic deflection loupe within a predetermined magnification range, wherein said moving of the at least first and second lenses through successive lateral configurations is such that movement of one of the at least first and second lenses is a non-linear function of movement of at least one other of the at least first and second lenses, while maintaining a given working distance of the loupe defined by the given entry optics at said given fixed location.

23. A binocular loupe system comprising: a frame configured to be worn on a head of a user; and a pair of prismatic deflection loupes mounted on the frame to be aligned with a pair of user's eyes, respectively, when the frame is worn by the user, wherein each of said prismatic deflection loupes is configured according to claim 1.

24. A binocular loupe system comprising: user's glasses, and a pair of prismatic deflection loupes mounted on the glasses being aligned with a pair of user's eyes, respectively, when the glasses are worn by the user, wherein each of said prismatic deflection loupes is configured according to claim 1.

25. A kit comprising: the binocular loupe system of claim 24, and a set of two or more entry optics of different optical properties, each of said entry optics being removably mountable on the distal portion of the loupe body.

26. A method for adjusting loupes of different magnification powers to a plurality of people, the method comprising executing for each person out of the plurality of people using a single adjustable loupe mounting system (ALMS): determining a right-eye loupe-position for the respective person based on a position of a right pupil of the respective person; determining a left-eye loupe position for the respective person, based on a position of a left pupil of the respective person; having the respective person experience at least four pairs of loupes, at least by:detachably coupling a first loupe to the single ALMS at the right-eye loupeposition, and detachably coupling a second loupe to the single ALMS at the left-eye loupe-position, such that the first loupe and the second loupe point to a single focal locus, such as to present to the respective person magnified and focused images of the focal locus via the first loupe and via the second loupe when the respective person wears the single ALMS; decoupling the first loupe from the single ALMS; and detachably coupling to the single ALMS at the right-eye loupe-position a third loupe having a magnification power different than a magnification power of the first loupe, such that the third loupe and a fourth loupe concurrently coupled to the single ALMS at the left-eye loupe position point to the single focal locus such as to present to the respective person magnified and focused images of the focal locus via the third loupe and via the fourth loupe when the respective person wears the single ALMS wherein loupe combinations experienced by different people out of the plurality of people differ by at least one loupe from one another; each loupe combination out of the loupe combination comprising the at least four pairs of loupes experience by a corresponding person out of the plurality of people; wherein each loupe combination out of the loupe combination comprises the first loupe, the second loupe, the third loupe, and the fourth loupe experienced by the corresponding person.

27. The method of claim 26, further comprising for each person out of the plurality of people using the single ALMS: serially detaching and detachably attaching a plurality of loupes of different magnification powers to the ALMS at a loupe-position selected from a group consisting of the right-eye loupe-position of the respective person and the lefteye loupe-position of the respective person, such that after each instance of attachment the respective person is presented with a magnified and focused images of the focal locus via different loupes associated with different eyes of the user.

28. The method of any one of claims 26, wherein for each person out of the plurality of people using the single ALMS: the different loupes are coupled to the ALMS such that the focal locus is positioned more than 30 degrees below an anatomical line of sight of the respective person.

29. The method of claim 28, wherein for each person out of the plurality of people using the single ALMS: the first loupe and the third loupe are detachably coupled to the ALMS in a first orientation with respect to the ALMS, wherein the second loupe and thefourth loupe are detachably coupled to the ALMS in a second orientation with respect to the ALMS, wherein the first orientation is a leftward orientation, and the second orientation is a rightward orientation.

30. The method of claim 26, wherein for each person out of the plurality of people using the single ALMS: the determining of the right-eye loupe-position of the respective person is followed by moving a first track-mounted adapter of the ALMS to the right-eye loupe-position of the respective person, wherein the detachably coupling of the first loupe to the ALMS comprises detachably coupling the first loupe to the first track-mounted adapter when the first track-mounted adapter is at the right-eye loupe-position of the respective person, wherein the detachably coupling of the third loupe to the ALMS comprises detachably coupling the third loupe to the first track-mounted adapter when the first track-mounted adapter is still at the right-eye loupe-position of the respective person.

31. The method of claim 26, for each person out of the plurality of people using the single ALMS: wherein the first loupe is a straight loupe and the third loupe is an angled loupe, angled in a degree of more than 20°.

32. The method of claim 30, comprising serially letting each person out of the plurality of people experience the at least four pairs of loupes in a duration of less than 10 minutes, the method comprising executing during the duration of less than 10 minutes at least the moving of the first track-mounted adapter of the single ALMS to the right-eye loupe-position of the respective person, and the sequential coupling and decoupling the loupes of the at least four pairs of loupes of the respective person.

33. The method of claim 26, comprising for each person out of the plurality of people: manufacturing a loupe-system for the respective person, based on evaluation of the different types of loupes tried by the respective person using the single ALMS.

34. The method of claim 26, comprising for each person out of the plurality of people: concurrently coupling to the single ALMS a pair of loupes of unmatched magnification levels, having the person alternately close a single eye at a time, thereby experiencing the differences between the two loupes, resulting in the person asking for loupes of another intermediate magnification level, thereby aiding the matching of loupes to the respective person.

35. The method of claim 26, wherein for each person out of the plurality of people, the detachably coupling of each loupe out of the four pairs of loupes takes less than 15 seconds.

36. The method of claim 26, wherein for each person out of the plurality of people, the determining of the right-eye loupe-position is followed by moving a first trackmounted adapter of the ALMS to the right-eye loupe-position of the respective person and by moving a second track-mounted adapter of the ALMS to the left-eye loupeposition of the respective person, wherein the moving of the first track-mounted adapter and the moving of the second track-mounted adapter takes less than 15 seconds per side of the person.

37. The method of claim 26, wherein the plurality of people includes at least ten people.

38. A method for adjusting loupes of different magnification powers to a plurality of people comprising at least a first person and a second person, the method comprising: determining for the first person out of the plurality of people a loupe-position for each of the eyes of the first person based on a positions of the pupils of the first person; detachably coupling to an adjustable loupe mounting system (ALMS) a first pair of loupes at the determined loupe-positions, such that the pair of loupes point to a single first focal locus, thereby presenting to the first person a magnified binocular image of the first focal locus via the loupes of the first pair of loupes; replacing the first pair of loupes coupled to the ALMS at the determined loupepositions to with a second pair of loupes coupled at the same determined loupe-positions that are pointing to a second focal locus, thereby presenting to the first person magnified and focused images of the second focal locus via the loupes of the second pair of loupes; replacing the second pair of loupes coupled to the ALMS at the determined loupepositions to with a third pair of loupes coupled at the same determined loupe-positions that are pointing to a third focal locus, thereby presenting to the first person magnified and focused images of the third focal locus via the loupes of the third pair of loupes; selecting loupes for the first person based on experiences of the first person with the first pair of loupes, the second pair of loupes, and the third pair of loupes;determining for the second person out of the plurality of people a loupe-position for each of the eyes of the second person based on a positions of the pupils of the second person; detachably coupling to the ALMS a fourth pair of loupes at the determined loupepositions, such that the pair of loupes point to a fourth focal locus, thereby presenting to the second person a magnified binocular image of the fourth focal locus via the loupes of the fourth pair of loupes; replacing the fourth pair of loupes coupled to the ALMS at the determined loupepositions to with a fifth pair of loupes coupled at the same determined loupe-positions that are pointing to a fifth focal locus, thereby presenting to the second person magnified and focused images of the fifth focal locus via the loupes of the fifth pair of loupes; replacing the fifth pair of loupes coupled to the ALMS at the determined loupepositions to with a sixth pair of loupes coupled at the same determined loupe-positions that are pointing to a sixth focal locus, thereby presenting to the second person magnified and focused images of the sixth focal locus via the loupes of the sixth pair of loupes; selecting loupes for the second person based on experiences of the second person with the fourth pair of loupes, the fifth pair of loupes, and the sixth pair of loupes; and manufacturing for the first person a first loupe-system based on evaluation by the first person of the first pair of loupes, the second pair of loupes, and the third pair of loupes, and manufacturing for the second person a second loupe-system based on evaluation by the second person of the fourth pair of loupes, the fifth pair of loupes, and the sixth pair of loupes, wherein the first loupe-system and the second-loupe system are different than the ALMS.

39. The method of claim 38, wherein for each person out of the plurality of people using the ALMS: the different loupes are coupled to the ALMS such that the focal locus is positioned more than 30 degrees below an anatomical line of sight of the respective person.

40. The method of claim 38, wherein for each person out of the first person and the second person, at least one of the pairs of loupes associated with the respective person comprises a straight loupe and at least one other pair of loupes associated with the respective person comprises an angled loupe, angled in a degree of more than 20°.

41. The method of claim 38, further comprising:prior to the coupling of the first pair of loupes: (a) moving a first track-mounted adapter of the ALMS to a right-eye loupe-position determined for the first person, and (b) moving a second track-mounted adapter of the ALMS to a left-eye loupe-position determined for the first person; and after the replacing of the second pair of loupes with the third pair of loupes and prior to the coupling of the fourth pair of loupes: (a) moving the first track-mounted adapter of the ALMS to a right-eye loupe-position determined for the second person, and (b) moving the second track-mounted adapter of the ALMS to a left-eye loupe-position determined for the first person.

42. The method of claim 41, comprising serially letting each person out of the first person and the second person experience the at least respective three pairs of loupes in a duration of less than 10 minutes, the method comprising executing during the duration of less than 10 minutes at least the moving of the first track-mounted adapter of the single ALMS to the right-eye loupe-position of the respective person, and the sequential coupling and decoupling the loupes of the at least three pairs of loupes of the respective person.

43. The method of claim 41, wherein for each person out of the plurality of people the moving of the first track-mounted adapter takes less than 15 seconds and the moving of the second track-mounted adapter takes less than 15 seconds44. The method of claim 38, comprising for each person out of the plurality of people: concurrently coupling to the ALMS a pair of loupes of unmatched magnification levels, having the respective person alternately close a single eye at a time, thereby experiencing the differences between the two loupes, resulting in the respective person asking for loupes of another intermediate magnification level, thereby aiding the matching of loupes to the respective person.

45. The method of claim 38, wherein for each person out of the plurality of people, the replacing of each loupe out of each pair of loupes associated with the respective person takes less than 15 seconds.

46. The method of claim 38, wherein the plurality of people includes at least ten people.

47. An adjustable loupes mounting system for interchangeable loupes, the system comprising: a support structure configured to be steadied against a head of a person;a first rigid track coupled to the support structure; left-loupe coupling for securing different detachable loupes to the first rigid track at different times at different positions along the first rigid track; a second rigid track coupled to the support structure; and right-loupe coupling for securing different detachable loupes to the second rigid track at different times at different positions along the second rigid track.

48. The adjustable loupes mounting system of claim 47, wherein the first rigid track and the second rigid track can be coupled to the support structure at different positions along a superior-inferior axis of the support structure.

49. The adjustable loupes mounting system of claim 47, wherein the left-loupe coupling is operable to secure a first detachable loupe to the first rigid track at a first distance from a midsagittal midline of the adjustable loupe mounting system concurrently to the right-loupe coupling securing a second detachable loupe to the second rigid track at a second distance from the midsagittal midline, wherein the first distance differs from the second distance by more than 5%.

50. The adjustable loupes mounting system of claim 47, further comprising a vertical displacement mechanism operable to controllably modify a vertical displacement of at least one of the left-loupe coupling and the right-loupe coupling along a superior-inferior axis of the support structure.

51. The adjustable loupes mounting system of claim 47, wherein at least one of the first rigid track and the second rigid track is coupled to a vertical track and is movable along the vertical track, wherein the vertical track is coupled to the support structure.

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