34 results about "Near vision" patented technology

An ophthalmic multifocal lens is presented, configured to provide distance vision and at least one other usable visual acuity. The lens comprises a translucent lens body having an optical axis and a refractive baseline, the refractive baseline extending to at least a portion of the lens body, and a diffraction grating configured to act as an optical splitter, extending concentrically in the radial direction and superimposed on at least a portion of the refractive baseline. The diffraction grating configured to act as an optical splitter is further configured to be continuous within at least a central 3 mm aperture, wherein the distance vision is provided by the -1st order diffraction, and the near vision is provided by the 2nd order diffraction.

An intelligent multifocal lens includes an optical zone. The optical zone includes a near vision zone, a transition vision zone, and a far vision zone surrounding the near vision zone and the transition vision zone. An add power of the near vision zone has a negative correlation with a radius of the near vision zone. A reduction of the power of the transition zone is in a range of 0.1 D to 0.6 D. The near vision zone and the transition vision zone have an interface therebetween, and a power of the near vision zone and a power of the transition vision zone at the interface therebetween are the same. The transition vision zone and the far vision zone have an interface therebetween, and a power of the transition vision zone and a power of the far vision zone at the interface therebetween are the same.

The present invention provides an intraocular lens and related technologies, which have regions concentric with a lens center O, including at least one distance region for correcting visual acuity for distance vision and at least one near region for correcting visual acuity for near vision, wherein the power in the distance region is reduced to provide a negative vertical spherical aberration that at least partially offsets the positive vertical spherical aberration caused by the cornea, and the near region has a predetermined base power at the lens center O and adds a positive fixed power to an aspherical reference power within a predetermined radial range of a virtual aspherical lens that completely offsets the positive vertical spherical aberration caused by the cornea, and the near region has at least three sub-regions arranged radially, wherein sub-region 1 provides a positive power deviation for the positive fixed power, sub-region 2 provides an approximately zero power deviation for the positive fixed power, and sub-region 3 provides a negative power deviation for the positive fixed power.

An accommodating intraocular lens (AIOL) for implantation within a capsular bag of a patient's eye comprises first and second components coupled together to define an inner fluid chamber and an outer fluid reservoir. The inner region of the AIOL provides optical power with one or more of the shaped fluid within the inner fluid chamber or the shape of the first or second com- ponents. The fluid reservoir comprises a bellows region with fold(s) extending circumferentially around an optical axis of the eye. The bellows engages the lens capsule, and a compliant fold region between inner and outer bellows portions allows the profile of the AIOL to deflect when the eye accommodates for near vision. Fluid transfers between the inner fluid chamber and the outer fluid reservoir to provide optical power changes. A third lens component coupled to the first or second component provides additional op - tical power.

An ophthalmic multifocal lens providing far, intermediate, and near vision having a light transmissive body with an optical axis and a refractive baseline extending over part of the lens body; further having a first portion coinciding with a central area of the lens body and a multifocal second portion extending concentrically radially; the second portion further comprising a symmetric multifocal diffractive grating superpositioned onto the baseline, covering a portion of the lens, its shape and resulting light intensity distribution changing with distance to optical axis, the first portion being substantially concave, connected to the ridge of the grating that is closest to the optical axis and provides a dominant optical power between intended far and intermediate powers; configured to have an energy ratio intended for far vision to energy intended for near vision being lower for predetermined aperture(s).

The invention relates to the field of optical lens design, particularly discloses a design method of a double-sided progressive multi-focus lens, and solves the technical problems that the front surface form of a traditional progressive multi-focus lens is single, and different requirements of myopia and presbyopia people on basic bending cannot be met at the same time. The method comprises the following steps: firstly, designing curved surfaces with different base bends of a far vision area and a near vision area of a front surface, then performing thickness compensation processing on the curved surfaces of the front surface, and finally, combining a traditional progressive multi-focus curved surface design rule to obtain a rear surface of the lens, so that double-sided progressive multi-focus collaborative design is realized, and the far vision area and the near vision area of the lens are enabled to adapt to different base bend requirements; and the overall visual effect is improved. The lens designed by the invention is better in optical performance and wider in adaptive crowd, and has higher practical value and market prospect.

A multi-focal ophthalmic lens using suppressed diffraction orders. A multi-focal ophthalmic lens includes an ophthalmic lens and a diffractive element. The ophthalmic lens has a base curvature corresponding to a base power. The diffractive element produces constructive interference in at least four consecutive diffraction orders corresponding to a range of vision between near vision and distance vision. The constructive interference produces a near focus point, a distance focus point, and an intermediate focus point between the near focus point and the distance focus point corresponding to the base power of the ophthalmic lens. The diffraction efficiency of at least one of the diffraction orders is suppressed to less than 10%.

The invention relates to the technical field of medicinal chemistry, in particular to a 2-methyl-2-azabicyclo [3.2. 1] octane derivative which has a structure as shown in a general formula I or a general formula II or pharmaceutically acceptable salt, solvate, hydrate, isomer or prodrug of the 2-methyl-2-azabicyclo [3.2. 1] octane derivative, and a preparation method and application of the 2-methyl-2-azabicyclo [3.2. 1] octane derivative. As an acetylcholine receptor agonist, the compound shows high activity and high selectivity to M3 receptor subtypes. In-vitro experiments show that under the concentration of 40 mu M, the receptor excitation rate of the compound (such as 9a, 10a and the like) exceeds 95%, and is obviously superior to that of a positive control drug Aceclidine (48.65%). Due to the characteristic, the compound can generate a powerful pupil contraction pinhole effect by efficiently exciting an eye iris M3 receptor so as to improve near vision, and meanwhile, stimulation to ciliary muscles and related side effects are expected to be reduced due to high selectivity of the compound.

According to some embodiments, an ophthalmic surgical system for treating presbyopia includes controllable components and a computer. The controllable components include a light source for generating a light beam and a scanner for guiding the focus of the beam. The computer determines an ablation profile to remove tissue from the central and peripheral regions of the cornea of ​​the first eye in a pair of eyes. The ablation profile is designed to: remove tissue from the central region to create a protrusion to provide near vision, and remove tissue from the peripheral region to correct to emmetropia.

This invention relates to the field of lens technology, particularly to a progressive multifocal ring-focusing and defocusing converging lens, comprising: a lens matrix, a distance vision ring-focus area, a near vision ring-focus area, a progressive area, and an outer vision area. The ring-focusing and defocusing converging microstructure is as follows: in the distance vision ring-focus area corresponding to the main optical area, a single ring-shaped cylindrical convex microlens generates a defocus amount C1, which is then converged by all the ring-shaped cylindrical convex microlenses in the upper distance vision area to generate a first converged defocus amount C11. In the near vision ring-focus area, a single ring-shaped cylindrical convex microlens generates a defocus amount C2, which is then converged by all the ring-shaped cylindrical convex microlenses in the lower near vision area to generate a second converged defocus amount C11. This invention achieves a smoother change in defocus amount at mid-to-long distances, reducing visual fatigue. It solves the problem in existing technologies where some lenses exhibit unstable defocus amounts at mid-to-long distances, resulting in unstable defocus amounts even with accommodation, thereby preventing and controlling the progression of myopia in children and adolescents.

The invention relates to a support device (100) for supporting an optotype (102) for an examination of the near vision of a subject, the support device comprising: - an attachment means (110) intended to receive a near-vision test bar (15) fixed to a refractor head (12), the attachment means comprising a partly open hook (115) extending from a base (112), the hook having an inner surface provided with a bearing portion on which the near-vision test bar is adapted to bear, the bearing portion having a cross section with a broken-line shape formed by a hexagonal portion and a square portion, the hexagonal portion being intersected by the square portion such that the square portion forms a notch in the hexagonal portion; and - a support portion (130) for supporting the optotype mounted on the base of the attachment means.

An optical see-through (OST) near-eye display (NED) system, integrating ophthalmic correction for an eye of a user, comprising: a partially transmissive partially reflective lens, including: an inner surface having an inner surface radius of curvature exhibiting a first optical power, an outer surface having an outer surface varying radius of curvature exhibiting a second optical power, and at least two zones, including a near vision zone characterized by a first progressive optical power, and a distant vision zone characterized by a second progressive optical power, wherein said first optical power is configured to provide ophthalmic correction with respect to reflected said light beam image for viewing by said eye, wherein said second optical power and said first progressive power, and said second progressive optical power are configured to provide ophthalmic correction with respect to transmitted said incoming light from said outward scene for viewing by said eye.

The utility model discloses a low near vision optical typoscope. Through clinical verification of the inventor, the correction efficiency of the low near vision optical typoscope is accurately quantified, so that the near vision of a patient can be effectively improved by the'dosage '(namely parameters such as near vision-assisting focal power, total vision-assisting focal power and near vision-assisting distance) of the optical typoscope so as to support long-time near-distance reading of the patient; therefore, the life quality of the patient is improved.

1. Name of the designed product: cylindrical lens (2). 2. Use of the designed product: replaceable near vision lens for ski goggles. 3. Design points of the designed product: in shape. 4. Picture or photo that best shows the design points: perspective view.

The utility model relates to a multifunctional piling auxiliary system, and belongs to the technical field of multifunctional piling. Comprising a far view angle camera used for monitoring the far view dynamic state of a steel pile and a pile hammer, a near view angle camera used for monitoring the near view dynamic state of the steel pile, an overlook angle camera used for monitoring the overlook dynamic state of the pile hammer and a displacement monitor used for monitoring the real-time displacement of the steel pile in the vertical direction. The far-view-angle camera, the near-view-angle camera, the overlook-angle camera and the displacement monitor are all electrically connected with the signal receiver, and the signal receiver is processed by the signal converter and then transmitted to the control device and the warning device. The states of the pile hammer and the steel pile are monitored from the far view angle, the near view angle and the overlook angle through the far view angle camera, the near view angle camera and the overlook angle camera, comprehensive visualization in the pile driving process is achieved in combination with the real-time displacement of the displacement monitor in the vertical direction, a pile hammer operator can accurately master the real-time states of the steel pile and the pile hammer, and the pile driving efficiency is improved. Therefore, corresponding reasonable operation is carried out.

In some embodiments of an enhanced monofocal intraocular lens (EMF IOL), the focal power of the EMF IOL is characterized by: a base focal power for distant vision that is consistent with a monofocal lens; and an additional power increasing structure for near vision, the additional power increasing structure including a central power increasing ring surrounding an optical axis of the IOL, and an axial power aperture at the optical axis of the IOL. In an embodiment, the power increasing structure is introduced by an approximate super Gaussian optical path difference, the super Gaussian having in its exponent a power greater than twice of radial coordinates. In some EMF IOLs, the optical path difference of the EMF IOLs is characterized by: a base wavefront for distant vision; and an additional power-increasing structured wavefront for near vision, the additional power-increasing structured wavefront being approximately characterized by a super Gaussian having, in its index, a power greater than twice of the radial coordinate r.

Three multifocal lenses 100, each lens including an optical zone. Each optical zone Oz includes a near vision zone 110, a transition vision zone 120, and a far vision zone 130 surrounding the near vis

To provide a spectacle lens that can assist both accommodation and convergence in near vision and reduce fatigue and stress of a wearer. [Solution] The eyeglass lens 1 is formed with a distance portion 10 located at the top of the lens for distance vision and a near portion 11 located at the bottom of the lens for near vision. The near portion 11 is provided with a depth of field extension component δ1 whose power changes to the positive side as it moves outward in the direction perpendicular to the optical axis of the lens, and a constant prismatic refractive power with a base direction on the nose side is provided to the entire surface of the lens.

The invention discloses a zero-adjustment near vision optical system and method based on dynamic far point matching, and relates to the technical field of visual optics and visual health. Through a quantitative formula F1 = F (infinity) + 1 / d, the near lens power F1 is customized for a user at a specific near working distance d, so that the eyeball adjusting load is zero when the user uses eyes at the distance. The system comprises a switchable optical lens group which is used for switching between the near correction state and the conventional foot correction far state. Meanwhile, a binocular alternate vision suppression module is integrated, and non-gazing eyes are out of focus through optical interference, so that the assembly load is eliminated. Further, the system may integrate an intelligent control unit, automatically switch optical states based on sensor data, and manage alternate suppression rhythms. According to the method, the visual state of zero adjustment load is introduced into the near-vision scene from the far-vision scene for the first time, and the problems of asthenopia and myopia progress caused by high-intensity short-distance eye use in the digital era are fundamentally solved.

The invention discloses a refraction and diffraction type mixed multi-focus presbyopia correction contact lens, and belongs to the technical field of design and processing of optical lenses, the contact lens comprises a lens main body, the front surface of the lens main body is provided with a middle and near vision optical zone, a near and far vision diffraction optical zone and a far vision optical zone in sequence from the center to the periphery; the middle and near vision optical area is used for correcting presbyopia; the distant vision optical area is used for correcting ametropia; and the near and far vision diffraction optical areas are used for transitioning the far vision optical area and the middle and near vision optical area. On the basis of a traditional multi-focus soft lens, near vision is expanded to far vision, the field depth range is prolonged, light loss and optical interference are reduced, good visual comfort is provided, and better visual quality can be provided.

A lens element adapted to a wearer and intended to be worn in front of the wearer's eyes under standard viewing conditions, comprising: - a refractive region including a distance vision region having a first refractive power, a near vision region having a second refractive power, and an intermediate vision region extending from the distance vision region to the near vision region and having a refractive power that varies continuously from the first refractive power to the second refractive power; - at least a first group of optical elements having at least a third refractive power, the at least first optical element group being superimposed on at least one of the distance vision, intermediate vision, and near vision regions of the refractive region, characterized in that the combination of the first optical element group and the refractive region to which it is superimposed provides an optical function adapted to the wearer that focuses an image of an object on the wearer's retina in central vision when the wearer gazes at the object through the at least one first optical element group.

Disclosed is a myopia prevention and control spectacle lens, including a lens body, wherein the lens body is provided with four regions including a first region for providing refractive power, a second region for inhibiting myopia development, and a third region and a fourth region for providing a progressive diopter variation. The first region has a function of focusing an image on a retina of an eye while correcting a refractive error. The second region has a function of restricting image focusing. The third region has a function of expanding a visual field. For distant vision identification, an image of an object is formed through the first region while imaging in front of or behind the retina is restricted through the second region. For near vision, through the third region, the vision is clearer, and the development of a refractive error of an eyeball can be inhibited or slowed down.

Three multifocal lenses 100, each lens including an optical zone. Each optical zone Oz includes a near vision zone 110, a transition vision zone 120, and a far vision zone 130 surrounding the near vis

The invention discloses a progressive multi-focus lens for controlling eye axis growth. The progressive multi-focus lens comprises a far-use area, a progressive channel and a near-use area which are sequentially arranged in the vertical direction. At least the peripheral area of the lens body is processed by laser to form a plurality of optical scattering microstructure points, and the microstructure points are uniformly distributed on the surface of the lens in an equiangular spiral manner according to a Fermat spiral distribution rule, so that multi-layer and multi-direction optical scattering is formed in the peripheral retina area of a wearer, the peripheral imaging contrast ratio is reduced, and the imaging quality is improved. Excessive growth of the ocular axis can be inhibited, and central vision is kept clear. The invention can be used in the field of juvenile myopia prevention and control.

The utility model provides a kind of near use far use double-piece magnetic attraction glasses, including a pair of assembly myopic lens main frame and a pair of foldable presbyopic magnetic attraction sleeve piece. First magnetic component is equipped with in main frame frame outer edge, and second magnetic component is correspondingly arranged in presbyopia sleeve piece, and quick adsorption and disassembly are realized by magnetic attraction mode. Presbyopia sleeve piece adopts inner concave lens structure, is thinner and lighter, avoids contact with main lens, and is equipped with multiple positive diopter specifications, satisfies different presbyopia needs. Sleeve piece can be folded and stored by folding nose pad assembly, convenient to carry. When using, presbyopia sleeve piece is adsorbed in front of main frame, realizes myopic and presbyopic lens optical superposition, completes far and near vision mode switching;After use, remove and fold and store. The utility model does not need to wear two pairs of glasses or use expensive progressive multifocal lens, has the advantages of simple structure, switching fast, low cost, wear comfortable, especially suitable for daily use of middle-aged myopic presbyopia population.

The present disclosure relates to a method for visualizing different vision zones on an ophthalmic lens. The method comprises receiving a calculated optical design profile being indicative of a specific patient's correction; creating a physical representation data of the optical design profile corresponding to a personalized optical design profile; wherein the optical design profile is configured and operable to enable design profile visualization and to identify main vision zones including far and near vision zones. There is also provided an ophthalmic device comprising a lens having a front and a back surface and a personalized optical design profile being applied onto at least one front or a back surface, wherein the personalized optical design profile is configured and operable to enable design profile visualization and to identify main vision zones including far and near vision zones.

The utility model discloses a kind of composite multi-microlens type defocus lens and functional spectacle frame, it is related to the technical field of spectacles, its including the center area of the lens is provided with far vision area;The lower area of the lens is provided with near vision area;The lens and far vision area are provided with lens, and the lens includes multiple lens groups;The lens group includes large lens, middle lens and small lens, and the power of large lens, middle lens and small lens is not all same.This lens breaks retinal adaptability through the change of defocus amount and spatial distribution, produces non-uniform defocus stimulation, prolongs myopia control effect duration, delays the defocus effect attenuation caused by long-term single stimulation, and the frame made of far infrared ray emitting material can emit far infrared light, promote blood vessel dilation, improve user's eye blood supply, and is beneficial to myopia prevention and control.

A new generation ophthalmic multifocal lenses and a method of manufacturing same. The lenses at least provide focal points for near, intermediate and far vision. The lens body provides a refractive focal point for intermediate vision. The lens body comprises a diffraction grating operating as an optical wave splitter, providing a diffractive focal point for near vision and a diffractive focal point for far vision. The lens body comprises a monofocal central zone extending over a distance from the optical axis of the lens body, and provides a focal point coinciding with one of the diffractive focal points. The diffraction grating (91) is arranged from a transition point at a radial position of the lens body where the monofocal central zone ends. At the transition point, the diffraction grating and the monofocal central zone have coinciding amplitude values.

The invention discloses a scattered presbyopia correction contact lens, and belongs to the technical field of design and processing of optical lenses, the scattered presbyopia correction contact lens comprises a lens main body, the front surface of the lens main body is provided with a far vision optical area used for correcting ametropia and a near vision optical area used for correcting presbyopia, the near vision optical area comprises a first near area and a second near area, the second near area is located in the center of the lens main body, and the first near area and the far vision optical area are alternately arranged in the circumferential direction of the lens main body. After improvement, no matter the lens deviates or rotates, 30%-40% of a near vision area can be ensured when a person looks near, and near vision can be provided and is not easily influenced by the size of pupils.

According to one or more embodiments, an automated system for performing precise eyewear measurements necessary for the fitting and manufacturing of corrective eyewear may be provided. The automated system may enable the measurement of interpupillary distances for distance and near vision, pupillary heights, reading distance, pantoscopic tilt, vertex distance, and frame curvature. These measurements may ensure that the corrective lenses are centered and adjusted to the visual needs of the wearer.