66 results about "Emmetropia" patented technology

An anterior chamber refractive correction lens (RCL), preferably a custom anterior chamber refractive correction lens (c-RCL) for visual or optical correcting multiple defects or problems of the eye.

Improved devices, systems, and methods for diagnosing, planning treatments of, and/or treating the refractive structures of an eye of a patient incorporate results of prior refractive corrections into a planned refractive treatment of a particular patient by driving an effective treatment vector function based on data from the prior eye treatments. The exemplary effective treatment vector employs an influence matrix which may allow improved refractive corrections to be generated so as to increase the overall accuracy of laser eye surgery (including LASIK, PRK, and the like), customized intraocular lenses (IOLs), refractive femtosecond treatments, and the like.

A corneal implant adapted for implantation between layers of a cornea to focus an image on a retina of an eye includes an inlay, an outer perimeter, and a clear central region capable of refracting light to compensate for a refractive error of an eye. The inlay also has an annular opaque region comprising a plurality of holes or otherwise being adapted to transport nutrients. The annular opaque region extends from the outer circumference of the inlay to the clear central portion. The opaque region extends over a minority of the surface area of the implant. The anterior and posterior surfaces of the inlay are configured to abut adjacent layers of the cornea.

Implants configured for corneal implantation are disclosed that have a light transmitting portion and a light-blocking portion disposed about the periphery of the implant. The implant can be an elongate member, such as a split or continuous ring, that can be implanted in the cornea to alter the refractive properties of the cornea by altering the curvature of the anterior surface of the cornea, thereby providing corrective refraction. The light-blocking portion can reduce edge effects, which may be visible or distracting to the patient.

Improved devices, systems, and methods for planning cataract surgery on an eye of a patient incorporate results of prior corrective surgeries into a planned cataract surgery of a particular patient by driving an effective surgery vector function based on data from the prior corrective surgeries. The exemplary effective surgery vector employs an influence matrix which may allow improved refractive corrections to be generated so as to increase the overall efficacy of a cataract surgery by specifying one or more parameters of an intraocular lens (IOL) to be implanted during the cataract surgery.

A method for determining a refractive correction for an eye involves measuring an optical error of the eye, calculating at least one image quality parameter for a selected spatial frequency of range of spatial frequencies, based on the measured optical error of the eye, and forming a plan for refractive correction of the optical error, based on the calculated image quality parometer. In some embodiments, measuring the optical error involves taking one or more wavefront measurements. In some embodiments, calculating the parameter involves calculation a modulation transfer function.

Ophthalmic lenses for correcting refractive error of an eye are disclosed. Ophthalmic lenses include a deformable inner portion and a deformable peripheral portion. When disposed over the optical region of an eye, the inner portion is configured so that engagement of the posterior surface against the eye deforms the posterior surface so that the posterior surface has a shape diverging form the refractive shape of the epithelium when viewing with the eye through the ophthalmic lens. The rigidity of the inner portion is greater than the rigidity of the peripheral portion and the ophthalmic lenses are configured to allow movement relative to the eye upon blinking of the eye and to be substantially centered on the optical region of the cornea following the blinking of the eye. Methods of correcting refractive errors of an eye such as astigmatism or spherical aberration using the ophthalmic lenses are also disclosed.

The invention discloses glasses having dynamic slight defocusing and zooming functions in an emmetropia direction and an eyesight adjusting device, and belongs to the field of eyesight rehabilitation glasses. The glasses include a carrier, a dynamic slight defocusing and zooming device having dynamic slight defocusing and zooming functions and arranged on the carrier, and an automatic focusing device for driving the dynamic slight defocusing and zooming device to defocus and zoom; the dynamic slight defocusing and zooming device includes a zooming lens group away from eyeballs and replacement lenses close to the eyeballs. The glasses can induce the eye axis length of ametropia to gradually recover to an emmetropia eye axis state; the eyesight adjusting device makes a bionic vision training device fused with the emmetropia direction dynamic slight defocusing and zooming glasses. The glasses are suitable for eliminating pathogenesis generating myopia, hyperopia, astigmatism, anisometropia, strabismus and amblyopia, and are suitable for prevention and treatment of myopia, hyperopia, astigmatism, anisometropia, strabismus, amblyopia and visual fatigue.

Devices, systems, and methods often by measuring characterize optical structures and systems, the standard refractive error and irregular aberrations. A retinal spot can propagate through optical tissues of an eye and can be directed to refractive correction optics for correcting standard refractive errors. The corrected image is then directed to wavefront analysis optics, which form a coarse pitch lenslet array pattern and a fine pitch lenslet array pattern. The coarse pitch pattern indicates the standard refractive error of the eye, and can be used to adjust the refractive correction optics. The fine pitch pattern is formed with the corrected retinal image, facilitating precise wavefront reconstruction, measurement of high order aberrations, and the like. The coarse pitch pattern and fine pitch pattern may be formed sequentially or simultaneously.

A system and method are provided for an ophthalmic surgical procedure to provide a refractive correction for an eye. Specifically, the procedure is indicated when the desired refractive correction “d_reqd” exceeds the capability of a correction achievable when corneal tissue is only ablated. In accordance with the present invention, an optimized refractive correction “d₁” is accomplished by the ablation of corneal tissue (e.g. by a PRK or LASIK procedure). The optimized correction is then followed by a complementary refractive correction “d₂” wherein stromal tissue is weakened with Laser Induced Optical Breakdown (LIOB). Together, the optimized refractive correction (ablation) and the complementary refractive correction (LIOB) equal the desire refractive correction (d_reqd=d₁+d₂).

A method for making accurate and precise customized corrections to the surface of an optical lens is described. An electronic correction contour is generated from a measured refractive correction for a patient, and transferred to the surface of the lens by ablation etching with one or more laser pulses. After each of the laser pulses, the refractive properties of the lens are measured and compared to the electronic contour correction derived from a patient's refractive correction. The ablation etching is terminated in localized areas where the refractive properties match the electronic correction contour. End point detection includes monitoring refractive qualities of the lens during the recontouring process, modifying the pattern through changes in the laser pulses.

A technique of refractive eye correction employs multiple steps to correct refractive errors in the eye. In the first step, gross decentrations of the refractive error are corrected, allowing the subsequent steps to be relatively symmetric in their treatment profile. Then, the eye's refractive error is again measured, and a subsequent treatment is applied for the remaining error. The overall treatment is thus completed in two or more steps.

The invention relates to a medical apparatus for correcting and detecting amblyopia, in particular to an amblyopia correction and detection device based on double-eye balance principle. The device comprises two liquid crystal lenses, a main plate, two optical sensors and a control system, wherein the two liquid crystal lenses are embedded on a lens framework, the main plate is fixedly arranged on the lens framework, the two optical sensors are respectively arranged at the inside surfaces of the two liquid crystal lenses, the control system consists of a remote controller which is performed with wireless communication with the main plate, the main plate is provided with a microprocessor, a wireless receiver, a storage card module, a real-time clock and a mode selection switch, the wireless receiver, the storage card module, the real-time clock and the mode selection switch are in communication connection with the microprocessor respectively, the two liquid crystal lenses are in control connection with the microprocessor on the main plate respectively, and the two optical sensors are in communication connection with the microprocessor on the main plate respectively. The device has the advantages that the multi-mode amblyopia therapy and correction training is realized, and the therapy and correction training modes can be freely adjusted according to the disease rehabilitation state of patients; the device is matched with the refraction collection and therapy, so the better amblyopia correction and binocular vision improvement effects are realized.

The invention discloses an eye diopter correction instrument, which comprises intelligent glasses, a microprocessor, a blinking control module, an ocular surface wetting module, a sensing module, an alarm module, a storage module, a communication module and a power supply module, wherein all modules are arranged on a glass body; the sensing module collects the eye utilization parameter of a user in real time and transmits the eye utilization parameter to the microprocessor; if the user is under a good eye utilization environment, the microprocessor controls the blinking control module to lowerthe blinking frequency of the user and prolong the gazing time of the user; if the user is not under the good eye utilization environment, the microprocessor controls the alarm module to emit an alarm to the user; if bad eye utilization environment time exceeds a set value, the microprocessor controls the blinking control module to enable the blinking frequency of the user to be under a normal level; when the gazing time of the user exceeds a set value, the microprocessor controls the ocular surface wetting module to supplement the ocular surface wettability of the user. According to the eyediopter correction instrument disclosed by the invention, the influence of bad environment on the eyes of the user is reduced, the good eye utilization environment is created, and the diopter correction problem of the eyes of the user is favorably solved.

The invention discloses a human eye vision monitoring system and method. The system comprises an intelligent terminal for graph display and human-computer interaction, a portable optometry unit for changing an optical path to complete measuring of each performance parameter of eyes and a server for analyzing and evaluating vision of a testee according to data sent by the intelligent terminal, andthe intelligent terminal is embedded at the starting end of the optical path of the portable optometry unit and is in data communication with the portable optometry unit and the server in a wireless or wired manner. The system can record measurement values of eye diopter and vision within a period of time and display changing trend of all measurement values within the period of time so as to realize evaluation and prediction of visual quality, can timely find the process of changing from pseudomyopia to real myopia and achieve the objective of restoring emmetropia by timely training and intervening a visual system at the stage of pseudomyopia and has good effect on preventing myopia of teenagers.

The invention provides an 8-domain design method and a system for improving the visual angle performance of the skin color of a colored race. The method comprises the following steps of: obtaining XYZof WRGB of 4-domain main region pixels under each preset visual angle under 256 preset voltages respectively; Setting an area ratio and a voltage ratio for the 4-domain main region pixel and the 4-domain sub-region pixel. The RGB gray value of the skin color feature of the colored race is obtained, the XYZ of the preset view angle of the RGB of the skin color feature of the colored race is calculated according to the RGB gray value of the skin color feature of the colored race, and the Yxy of the preset view angle of the RGB of the skin color feature of the colored race is further calculated.The difference between RGB emmetropia angle Yxy and lateral angle Yxy is calculated. According to the relation between the difference value and the preset threshold value, the area ratio and the voltage dividing ratio of the pixels in the 4-domain primary region and the pixels in the 4-domain secondary region are adjusted. As that area ratio and the voltage ratio of the 4-domain main region pixeland the 4-domain partition pixels are set for the 8-domain pixel non-colored skin color RGB, the problem of poor viewing angle performance of the non-colored skin color RGB in the prior art is solved.

Improved devices, systems, and methods for planning cataract surgery on an eye of a patient incorporate results of prior corrective surgeries into a planned cataract surgery of a particular patient by driving an effective surgery vector function based on data from the prior corrective surgeries. The exemplary effective surgery vector employs an influence matrix which may allow improved refractive corrections to be generated so as to increase the overall efficacy of a cataract surgery by specifying one or more parameters of an intraocular lens (IOL) to be implanted during the cataract surgery.

The invention provides a multi-domain liquid crystal display (LCD). The display includes an LCD panel, an incident-side polarizer and an exit-side polarizer. The LCD panel includes a plurality of pixel structures arranged in an array. Each pixel structure includes at least two sub-pixels respectively corresponding to different colors. Each sub-pixel is divided into at least four domain regions. Each domain region includes a plurality of branch electrodes which are mutually parallel and are distributed in a spaced manner. Included angles between branch electrodes of at least two sub-pixels respectively corresponding to different colors to the sub-pixels of different colors and a transmission axis of the incident-side polarizer are different. Compared with the prior art, the display furtherenables the branch electrodes in the sub-pixels corresponding to the different colors and the transmission axis of the incident-side polarizer to have the different angles on the basis of a multi-domain structure to reduce degree difference of voltage transmission rate curve deviation of red, green and blue sub-pixels under squinting and emmetropia, can effectively relieve the visual-angle color deviation problem of liquid crystal display panels, is simple in a structure and a manufacturing method, and cannot bring other additional manufacturing process and cost impacts.