176 results about "Refractive error" patented technology

This application provides a lens element, an optical lens group, a mold, and spectacles. The lens element includes: a base region, where the base region includes a prescription region for correcting a refractive error of an eye; and a plurality of insular regions, where the insular regions include regions for inhibiting development of the refractive error of the eye, where at least some of the insular regions are adjacent to each other and have a shared edge; and for edges of all the insular regions on the lens element, a length of a shared edge portion is L1, a length of a non-shared edge portion is L2, and a ratio of L1 to L2 is 0.3 or more. The optical lens group includes a first lens element and a second lens element. When the first lens element and the second lens element are placed parallel to each other and coaxially, at least one relative position exists for the first lens element and the second lens element, to make the first lens element and the second lens element meet a specific relationship.

The invention discloses an ophthalmology department vision examination data collection and analysis system, and relates to the technical field of ophthalmology department vision examination data collection and analysis. An examination data collection module is used for examining and collecting ametropia and eye movement behaviors of a current patient, and an ametropia basic correction unit is used for calculating and outputting correction lens degree JD; an eye movement capturing precision evaluation value Y is calculated and output by utilizing an eye movement capturing precision evaluation unit, a feedback adjustment coefficient T and an updated correction lens degree JDnew are sequentially calculated and output by utilizing an ametropia feedback adjustment correction unit, and a result display module is utilized to display the correction lens degree JDnew. The updated correction lens degree JDnew of current correction and next optometry is displayed to the current patient, correction degree calculation of ametropia is continuously optimized according to the accuracy change of eye movement behavior capture, then the correction effect is improved, meanwhile, a formed feedback cycle mechanism also enables the system to have the self-learning and optimization ability, and the system can be widely applied to the field of medical science, medical science and medical science. And individual differences and disease changes of patients can be continuously adapted.

The invention belongs to the technical field of refraction detection, and particularly relates to a human eye dynamic refraction detection method based on a three-dimensional phase deflection method. The method comprises the following steps: S1, based on a three-dimensional phase deflection imaging system and an iterative representation integral algorithm, obtaining a 3D shape of a to-be-detected human eye in place in real time; s2, on the basis of the 3D shape of the to-be-detected human eye, the current staring direction of the to-be-detected human eye is obtained in real time in place by combining a ray tracing method; s3, establishing a refractive imaging system, and obtaining a diopter value of the to-be-measured human eye in the current staring direction in real time in place based on the refractive imaging system; and S4, fitting different staring directions of the to-be-detected human eyes and the dynamic numerical curve of the diopter values in the corresponding staring directions to realize human eye dynamic refraction detection. According to the method, an accurate treatment scheme can be accurately provided for the ametropia patient in a real scene, and guidance can be provided in the aspect of personalized customization of the spectacle lenses.

The application discloses a microstructure lens and glasses, comprising: a lens body having an optical center; the first microstructure unit is connected with the lens body, the first microstructure unit surrounds the optical center, and the geometric center of the first microstructure unit coincides with the optical center; the plurality of second microstructure units are connected with the lens body, and the plurality of second microstructure units are arranged around the first microstructure unit; the geometric center of any one of the plurality of second microstructure units does not coincide with the geometric center of the first microstructure unit, and the geometric centers of any two of the plurality of second microstructure units do not coincide. According to the micro-structure spectacle lens, the first micro-structure unit and the second micro-structure unit have the function of not focusing light on the retina, and the eccentric asymmetric layout can introduce stimulation signal micro-fluctuation of the micro-structure area on the surface of the lens, so that the time of a high-intensity stimulation effect can be kept; and the durability of the lens in intervening the refractive error development is improved.

The invention discloses a wafer six-surface detection automatic focusing method comprising the following steps: correcting the crystal grain position through a feeding XYR platform, and obtaining a to-be-detected crystal grain image; according to a to-be-detected crystal grain image, edge points in the edge contour of the crystal grain are converted into geometric parameters by using a Hough transform algorithm, and a position compensation value of the crystal grain is calculated; determining an optimal focus position of a front / back detection station of the to-be-detected crystal grain according to the optical characteristics, the light deflection angle and the incident light intensity of the crystal grain, and adjusting the focus position of the focusing module; according to the position compensation value of the crystal grain, an electric sliding table is controlled to carry an optical camera to move in place and focus and image; and by comparing actual detection data with prediction results of the refraction deviation correction model and the crystal grain front / back focus adjustment model, the accuracy of the model is evaluated and optimized. According to the invention, the problems of position error, optical characteristic difference, refraction deviation and the like in the prior art are effectively solved, and efficient and accurate crystal grain detection is realized.

A system and method for interactively measuring ocular refractive errors, addition and power of reading glasses without the need of an optical component that would change optical vergence of a target. The system can measure the distance from a user's eyes to either or both border of interval of clear vision, for one orientation or two perpendicular orientations. The measurements together with the user's age can be used to estimate sphero-cylindrical refraction, addition and power of reading glasses. The system can use different sizes, directions and colors of targets which can change with said distance or user interaction.

A lens element intended to be worn in front of an eye of a wearer, the lens element comprising:-a holder, and-a plurality of optical elements superimposed on the holder, each optical element simultaneously provides a first optical function based on a prescription of the wearer for correcting refractive abnormalities of the eye and a second optical function that does not focus an image on the retina of the eye, characterized in that each optical element comprises a central region and a plurality of outer regions surrounding the central region, a maximum height of the central region is smaller than a maximum height of the outer region.

The present disclosure relates to an ophthalmic lens comprising an optical zone and a control zone. And the optical area can provide a correction effect on the vision of the ametropia patient. The control area surrounds the central optical area of the spectacle lens and comprises control subunits which are sequentially arranged in the circumferential direction, each control subunit is provided with a plurality of first lens arrays and second lens arrays which are parallel to one another, each first lens array comprises a plurality of first lenses which are attached to one another, and each second lens array comprises second lenses which are attached to one another. The change rate of the modulation-demodulation function of each control subunit at adjacent positions in the circumferential direction under each frequency is extremely small, and the size of the point sequence diagram is not changed, and the directions are different. The spectacle lens can achieve a long-term effective ametropia prevention and control effect.

The invention discloses a peripheral retina data-based microstructure lens and a design method, and the lens comprises a mother lens which is provided with a first surface facing the retina of a human eye; the first surface comprises a central luminosity area, a luminosity modulation area and a luminosity compensation area which are arranged in sequence; the central luminosity area, the luminosity modulation area and the luminosity compensation area are respectively arranged around the optical center in a concentric circle mode; the luminosity modulation area is provided with a plurality of first areas which are divided into equal areas, the luminosity compensation area is provided with a plurality of second areas which are divided into equal areas, and the first areas and the second areas are adjacent in the first direction and jointly matched so as to be used for intervening the imaging quality of the retina within the pupil range. Peripheral retina data is adopted to carry out design compensation on spectacle lenses, so that a more accurate and more personalized correction mode is realized, and an optimal management method for inhibiting ametropia can be selected according to the actual condition of a wearer.

A system includes an actuator, one or more items of diagnostic equipment configured to perform ophthalmic measurement, and one or more items of treatment equipment configured to facilitate performance of an ophthalmic treatment with respect to an eye of a patient. A controller is coupled to the actuator and is configured to cause the actuator to transfer the one or more items of diagnostic equipment and the one or more items of treatment equipment into and out of a region in front of an eye of the patient. The ophthalmic treatment may be a LASIK or SMILE treatment using refractive error and / or eye geometry measured using the diagnostic equipment.

A system includes an actuator, one or more items of diagnostic equipment configured to perform ophthalmic measurement, and one or more items of treatment equipment configured to facilitate performance of an ophthalmic treatment with respect to an eye of a patient. A controller is coupled to the actuator and is configured to cause the actuator to transfer the one or more items of diagnostic equipment and the one or more items of treatment equipment into and out of a region in front of an eye of the patient. The ophthalmic treatment may be a LASIK or SMILE treatment using refractive error and / or eye geometry measured using the diagnostic equipment.

A computer-implemented method for determining a refractive error of an eye of a person includes the following steps: a) generating input data containing a distance between the eye of the person and a visual stimulus displayed to the eye of the person and b) generating outcome data containing a refractive error of the eye of the person determined by evaluating the input data. A position of the entrance pupil of the eye of the person is considered when the refractive error of the eye of the person is determined. A computer program, a field device, a remote device, a determining device, a method for producing a geometrical model of a spectacle lens, and a method for producing a spectacle lens are also disclosed. The present disclosure provides a fast, easy, versatile, reliable, and accurate approach for determining a refractive error of an eye of a person.

A source of light energy such as a source of violet light energy is coupled to a structure configured to contact the eye. The light source and structure are arranged to provide therapeutic amounts of violet light energy to the eye in order to inhibit the progression of refractive error such as myopia. The light source can be configured in many ways and may comprise a radioisotope and a phosphorescent material. The structure configured to contact the eye may comprise a contact lens or an implant.

A method for automatically determining multifocal lens parameters associated with a contact lens and a contact lens for correcting ametropia of a patient's eye wherein a personalized multifocal contact lens for treating presbyopia takes into account various related clinical patient measurements including patient clinical data and lifestyle data, to determine which lens is likely to provide personalized lens parameters for new patients. Historical patient clinical data and lifestyle data are used to train the system to predict which multi-focal lenses (i.e., lenses including lens designs and having lens geometries and powers) would result in optimal lens-to-eye fit and optimal visual function for each eye of presbyopia patients.

The invention provides a fundus OCT imaging diopter adaptive matching method and device, and relates to the technical field of retina imaging, and the method comprises the following steps: detecting pupil positions in real time, automatically tracking pupils, and controlling a reference arm motor and a sample arm motor to move to initial positions; a reference arm motor is controlled to move, meanwhile, a retina structure in an OCT image is detected through a deep learning algorithm, and the eye axis length of the testee is automatically matched; the reference arm motor and the sample arm motor are controlled to move synchronously, the retina focusing position is found by calculating the composite information entropy of the OCT image, and the diopter of the testee is automatically compensated; and detecting and adjusting the position of the retina in the image by using a deep learning algorithm to cover retina imaging with a large view. According to the method, the OCT imaging device is automatically controlled, an automatic solution is provided for eye ground screening of people of multiple age groups and various ametropia groups, the overall image quality collected by OCT is improved, and the operation simplicity and the imaging speed are remarkably improved.

The present disclosure is directed to methods of tuning chromatic aberration of the eyes of a subject for the treatment of myopia. Refractive errors of an eye of the subject are assessed in the presence of one or more of red, blue, or green colored light, individually. A hybrid achromatic lens having a refractive portion and a diffractive portion is then designed, with the hybrid lens having a distribution of power varied between the refractive portion and diffractive portion. As such, the hybrid lens produces a state of chromatic aberration for the eyes of the subject capable of reducing or eliminating myopia advancement for the eyes of the subject.

Provided herein are a soft contact lens for correcting an ocular refractive error of an eye, the soft contact lens comprising a vaulted portion and a specialty feature.

A method of determining an angle of repose of a contact lens on an eye of a user of the contact lens, the method comprising, at a computing device 100: obtaining data indicative of a refractive error

The embodiment of the invention provides an out-of-focus lens and a design method thereof. N annular optical correction areas and N annular optical out-of-focus areas are alternately arranged on the radial outer side of one circular optical correction area and are concentric. The ratio of the total area of the annular optical defocus area to the total area of the defocus lens is 0.55-0.58. The focal power of the optical correction area is first focal power, and the focal power of the optical defocus area is second focal power. The optical correction area image space focus is located on the image space of the annular optical correction area image space focus. By applying the embodiment, the plurality of optical correction areas form a clear image on the retina of the human eye to correct refractive error of the human eye, the plurality of optical defocus areas form an image in front of the retina to generate myopia defocus to delay eye axis growth, the optical correction areas and the optical defocus areas are alternately arranged, and the eye axis growth is delayed by controlling the areas of the optical correction areas and the optical defocus areas. The peripheral defocusing effect is achieved, the visual quality is improved, and the myopia progress is delayed.

The invention relates to the glasses industry, and aims to provide a lens structure for assisting eye disease rehabilitation by filtering and a manufacturing method thereof. A traditional lens is mainly used for correcting ametropia, and on the basis, by changing the filtering permeability of the lens, the filter lenses with different colors are used for filtering light rays with different wavelengths, the light rays act on fundus cells, the functions of the fundus cells are affected, and the effects of protection and auxiliary treatment of eye diseases are achieved. Yellow, tawny, gray, red and Finnish green filter lenses and sleep-aiding blue lenses (10%-30% of dyed lenses) are specifically designed. Lenses with different colors have unique filtering characteristics and can play a role in different eye diseases, for example, a light yellow lens is added to amblyopia to accelerate rehabilitation, and a brown lens is added to macular degeneration to suppress disease development. Meanwhile, the invention further provides a lens manufacturing method which comprises the steps of adding a color matching standard, carrying out standard operation on a dyeing heating process and the like, and the lens chromatic aberration is controlled in the horizontal direction so as to ensure the lens quality and the filtering effect.

A vision screening device displays visual stimuli and captures image(s) of the eye while the visual stimuli is changing over a period of time. The vision screening device uses the images to determine and monitor refractive error, ambient light level(s), pupil size, and gaze angle as the visual stimuli changes over the time period. Based on the refractive error, a determination of hyperopia and / or presbyopia is made. Based on the gaze angle and / or the pupil size, a confidence metric is determined. Based on the confidence metric and / or the determination, a recommendation for the patient is generated and displayed.

An ultraviolet laser-based (UVL) laser vision correction (LVC) system, a contact interface and a contact interface system for such a UVL-LVC system. The invention facilitates a coupling and affixation between the patient's eye and the UVL-LVC system by application of a contact interface for the purposes of preventing eye movements when using UVL-LVC systems. The invention includes a UVL-LVC system with a base unit and an application arm which has a contact interface adapter on an application part of the application arm, to which a contact interface is affixable, the contact interface being usable to be to affix a patient's eye to the UVL-LVC system. The contact interface may have a conical wall and a suction ring but not a lens element, and optionally has an access opening or a corresponding contact interface system made of a contact interface adapter and a contact interface.

The present disclosure is particularly directed to contact lens devices and / or methods for myopia treatment. The present disclosure is directed to modifying the incoming light by a contact lens, using a stop signal to slow the rate of progression of myopia. More particularly, the present disclosure is directed to a purposeful configuration of a non-circular, non-transparent aperture stop on the original base single-vision optic zone of a contact lens that can facilitate the redistribution of light energy into the oblique frequencies of the retinal image to provide an optical stop signal that prevents, reduces or controls the progression of refractive error of progressive myopia.

The present invention provides a spectacle lens for regulating the axial growth of adolescents' eyes. The spectacle lens comprises a first refractive area providing a first diopter for correcting refractive errors; and a second refractive area focusing light on a location other than the retina and providing one or more second diopters different from the first diopter. The second refractive area is provided with a plurality of interconnected microlenses. The spectacle lens can effectively regulate the axial growth of adolescents' eyes, thereby inhibiting the progression of refractive errors.

A head-mounted display may include a display system and an optical system in a housing. The display system may have displays that produce images. Positioners may be used to move the displays relative to the eye positions of a user's eyes. An adjustable optical system may include tunable lenses such as tunable cylindrical liquid crystal lenses. The displays may be viewed through the lenses when the user's eyes are at the eye positions. A sensor may be incorporated into the head-mounted display to measure refractive errors in the user's eyes. The sensor may include waveguides and volume holograms, and a camera for gathering light that has reflected from the retinas of the user's eyes. Viewing comfort may be enhanced by adjusting display positions relative to the eye positions and / or by adjusting lens settings based on the content being presented on the display and / or measured refractive errors.

The invention relates to a device (200) for determining refractive errors of at least one eye (1) of a subject, the device comprising: a correction system (110) comprising a variable power optical system; a system for measuring the refractive error of said eye, comprising a light source (31), an illumination optical system (33) adapted to direct a light beam towards the eye (1) of the subject in order to form a reflected light beam (34), an image detection system (35), and a beam splitter (10) adapted to direct the reflected light beam (34) towards the image detection system (35), the beam splitter (10) enables a user to see a target scene through the optical beam splitter (10) and the variable-power optical system at the same time; and a computing system comprising an image processing system adapted to process the image and derive therefrom a measure of refractive error of the eye.

In general, one aspect disclosed features a lens comprising: a central zone having an optical center corresponding to the visual axis of an eye of a patient; and a peripheral zone peripheral to the central zone and comprising: a first zone having a first thickness, and a second zone having a second thickness, wherein: the second thickness varies from the first thickness, and a distance from the second zone to the optical center of the central zone is selected to generate pincushion distortion or barrel distortion in the eye of the patient.

Method for generating control data which are designed to control a laser processing device (L) for the surgical correction of refractive errors of an eye (3), wherein an anterior cutting surface (19), a posterior cutting surface (20) and a marginal cut (30) are defined for the delimitation of a volume (18) in the cornea (5), which are to be generated as cutting surfaces in the cornea (5), wherein - the posterior cut surface (20) has a non-circular, oval edge (38) which lies in a plane (40), - the marginal cut (30) connects the marginal (38) with the anterior cut surface (19) and - the boundary section (30) is formed as the lateral surface of a non-rotationally symmetric cylinder or truncated cone, whose guide curve is the boundary (38).

The present invention relates to a computer-implemented method (400), a computer program and an apparatus (100) for determining at least one lens shape (202) for producing at least one optical lens (200) for at least one eye (302) of a person (300) as well as to use of a personal computer. Herein, the method (400) comprises the following steps: a) receiving first information (450) about at least one refractive error of at least one eye (302) of a person (300) and second information (440) related to the person (300); b) determining at least one lens shape (202) for at least one optical lens (200) for the at least one eye (302) of the person (300) designated for correcting the at least one refractive error of the at least one eye (302) of the person (300) using the first information (450), wherein at least one lens shape parameter of the at least one optical lens (200) is adapted to the second information (440) related to the person (300), characterized in the at least one piece of the second information (440) is determined from data recorded by at least one electronic component (102) of at least one personal computer used by the person (300), wherein the at least one electronic component (102) of at least one personal computer is selected from least one of: - at least one distance sensor; - at least one depth sensor; - at least one ambient light level sensor; - at least one screen inclination sensor (108); or - at least one storage device (110).