16 results about "Peripheral retina" patented technology

Systems and methods are provided for improving overall vision in patients suffering from a loss of vision in a portion of the retina (e.g., loss of central vision) by providing symmetric or asymmetric optic with aspheric surface which redirects and / or focuses light incident on the eye at oblique angles onto a peripheral retinal location. The intraocular lens can include a redirection element (e.g., a prism, a diffractive element, or an optical component with a decentered GRIN profile) configured to direct incident light along a deflected optical axis and to focus an image at a location on the peripheral retina. Optical properties of the intraocular lens can be configured to improve or reduce peripheral errors at the location on the peripheral retina. One or more surfaces of the intraocular lens can be a toric surface, a higher order aspheric surface, an aspheric Zernike surface or a Biconic Zernike surface to reduce optical errors in an image produced at a peripheral retinal location by light incident at oblique angles.

The invention belongs to the technical field of medical equipment, and particularly relates to gradient out-of-focus hyperopia correction glasses and a design method thereof.The gradient out-of-focus hyperopia correction glasses are each provided with a lens structure with three functional partitions, each lens structure comprises a base lens, and the central portion of each base lens is a central correction area; the annular transition stimulation area is located outside the central correction area, and the peripheral strengthening area is located on the outer side of the transition stimulation area. The design of the gradual-change hyperopia defocusing amount conforms to the effect that the hyperopia defocusing amount is increased in a stepped mode due to the fact that the retina form is transited to the peripheral retina from the macular area, and the good vision correction and hyperopia treatment effects are achieved, it is guaranteed that a clear object image is formed in the central area, and amblyopia training of a patient is not affected; a relatively clear central side view field range is provided, and the visual quality is ensured; peripheral retina hyperopia defocus is formed, and eye axis growth and hyperopia degree reduction are promoted.

This application discloses an optical element and an optical wearable device. The optical element includes a substrate with a visible field of view and a control area surrounding the visible field of view. The control area has multiple recessed structures, each with an opening and an optical functional surface. The optical functional surface and the opening together define the recessed structure. The optical functional surface and the surface of the substrate have an angle, so that incident light rays can be deflected when passing through the optical functional surface along the thickness direction, thereby forming a blurred image in the peripheral retina, reducing the imaging quality of the peripheral retina and suppressing the abnormal development of refractive errors.

The invention discloses an ocular axis growth regulation spectacle lens, and relates to the technical field of optical lenses. The spectacle lens is suitable for frame glasses and corneal contact lenses and is provided with a central optical area and a peripheral filtering area, the central optical area is located in the middle of the spectacle lens, the peripheral filtering area is arranged around the central optical area, the central optical area is an area where all visible light wavelengths penetrate, and the peripheral filtering area is located in the middle of the spectacle lens. The peripheral filtering area is an area for selectively transmitting or blocking the target wavelength light, and the peripheral filtering area is used for filtering or blocking the target wavelength light to the peripheral retina so as to adjust the growth of the ocular axis. All visible light wavelengths can penetrate through the central optical area to ensure normal visual experience of a wearer, and the peripheral filtering area selectively penetrates through or blocks light rays with specific wavelengths, so that the spectacle lens can accurately adjust illumination conditions around the retina and inhibit light with unsuitable wavelengths under the condition that normal vision is not interfered, and the quality of the spectacle lens is improved. The effect of adjusting the growth rate of the ocular axis is achieved.

Aspects of the present disclosure relate to an integrated contact lens device for ophthalmoscopic examination, including a lens portion, an upper lid speculum portion, and a lower lid speculum portion, and methods of use thereof. The integrated contact lens device facilitates improved visualization of the peripheral retina, including the upper and lower hemi-retina, both via manual examination and via a wide-angle camera, which may utilize the contact lens for viewing. The integrated contact lens device also prevents or reduces corneal dryness and patient discomfort during the examination.

Methods of inhibiting progression of myopia apply myopia inhibiting wavefront corrections to light incident on the peripheral retina. A method of inhibiting progression of myopia includes applying a myopia inhibiting wavefront correction to light from a peripheral vision region. An annular sector of an ophthalmic lens is configured so that light from the peripheral vision region forms an image on an annular region of the peripheral retina. The myopia inhibiting wavefront correction is configured to reduce a circumferential-to-radial aspect ratio of the image.

Systems and methods are provided for improving overall vision in patients suffering from a loss of vision in a portion of the retina (e.g., loss of central vision) by providing a piggyback lens which in combination with the cornea and an existing lens in the patient's eye redirects and / or focuses light incident on the eye at oblique angles onto a peripheral retinal location. The piggyback lens can include a redirection element (e.g., a prism, a diffractive element, or an optical component with a decentered GRIN profile) configured to direct incident light along a deflected optical axis and to focus an image at a location on the peripheral retina. Optical properties of the piggyback lens can be configured to improve or reduce peripheral errors at the location on the peripheral retina. One or more surfaces of the piggyback lens can be a toric surface, a higher order aspheric surface, an aspheric Zernike surface or a Biconic Zernike surface to reduce optical errors in an image produced at a peripheral retinal location by light incident at oblique angles.

A system and method are provided for bimodal detection and / or imaging of macular pigments. Fundus autofluorescence spectroscopy is applied in a first and a second region of an eye to measure fluorescence values from the fluorescing pigment (e.g., lipofuscin). The first region can be a macula, which has a higher density of macular pigments, and the second region can be in the peripheral retina, which has a lower density of macular pigments. Fundus reflection spectroscopy is applied in the first and a second region of an eye, as a baseline image, to determine absorptions due to other pigments (e.g., melanin) than the macular pigments and the fluorescing pigment. The density of macular pigments is determined using the measures fluorescence values and the absorptions due to other pigments.

An apparatus for treating refractive error of an eye includes one or more optical elements configured to project a stimulus including a defocused image onto a peripheral retina outside the macula. While the stimulus can be configured in a variety of ways, in some embodiments the stimulus is arranged to reduce interference with central vision, such as macular vision. The stimulus can be a defocused image, can include an amount of defocus in a range of about 3 diopters ("D") to about 6 D. In some embodiments, the stimulus is of a brightness that is a suitable amount greater than the brightness of background illumination, such as at least 3 times the background brightness. In some embodiments, each of a plurality of stimuli includes a spatial frequency distribution having an amplitude profile, the spatial frequency distribution having a spatial frequency in a range of about 1 x 10 ‑1 cycles per degree to 2.5 x 10 1 cycles per degree.

A lens for an eye that includes a zone with a first power profile for images received by the retina on the fovea, a zone with a second power profile for images received by the peripheral retina on the nasal side and a zone with a third power profile for images received by the peripheral retina on the temporal side. The first power profile is selected to provide clear or acceptable vision and the second and third power profiles are selected to affect the peripheral image position.

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 invention discloses a scattering optical lens applied to the technical field of optics, the inherent contradiction between the central vision definition and the peripheral myopia control efficiency is successfully decoupled by realizing the spatial programmability of the scattering characteristic on the lens, and the lens can be used for improving the vision definition and the peripheral myopia control efficiency according to the specific vision requirement of a user. Scattering units with low scattering intensity and narrow scattering angle distribution are densely arranged in a central vision area, so that high-resolution visual quality and contrast are ensured, and glare and visual discomfort are avoided. Meanwhile, scattering units with high scattering intensity, wide scattering angle distribution or a specific phase modulation function are arranged in the peripheral area, so that accurate myopia defocus signals are effectively induced on peripheral retinas or the imaging contrast ratio is greatly reduced, the myopia control effect is maximized, a regionalized optical intervention mode is adopted, and the myopia control precision is improved. The optical efficiency and the treatment effect of myopia control are remarkably improved, and meanwhile the visual comfort of a wearer is guaranteed.

The utility model relates to myopia prevention and control lens technical field, especially a double -sided composite prevention and control lens. Double -sided composite prevention and control lens includes lens body, microlens off -focus area and fog view area, and the optical center is formed to the center of lens body, and microlens off -focus area sets up in the first curve of lens body, and fog view area sets up in the second curve of lens body. Because the first curve of lens body sets up microlens off -focus area, and fog view area is arranged in the second curve, microlens off -focus area provides high -intensity off -focus stimulation, and acts on the peripheral imaging of retina, and the fog view area of second curve can reduce the contrast of peripheral retina, and while correcting central vision, under the double -effect mechanism of peripheral off -focus and contrast control, double -action inhibits the too fast growth of eye axis, and improves myopia prevention and control efficiency. Meanwhile, because the projection area of microlens off -focus area and fog view area coincides, the optimization ability to the peripheral imaging of retina is enhanced, and the precise intervention to the peripheral hypermetropia off -focus of retina is realized.

Peripheral retinal OCT can be used to generate peripheral retinal OCT images allowing for the peripheral retina to be viewed. A peripheral retinal vision system can determine that a set of fiducial markers is in a field-of-view of at least one camera and record positional data comprising a contact lens position and angle with respect to an OCT imaging system having OCT scanning mirrors in a first position. The system can determine whether a retinal layer is in an OCT scan captured while the set of fiducial markers is in the field-of-view of the at least one camera and the OCT scanning minors are in the first position; and for an OCT scan having he retinal layer and being captured while the set of fiducial markers is in the field-of-view of the at least one camera and the OCT scanning minors are in the first position, store that OCT scan.

The application discloses a scattering lens and a design method thereof applied to the technical field of optical devices and vision correction, and aims to solve the technical contradiction that a traditional myopia control lens is difficult to consider central vision clarity and effective intervention of a peripheral retina, the method constructs a central, transition and peripheral three-zone heterogeneous scattering array, differentiates and configures unit density, size and scattering angle, and adopts non-periodic arrangement to inhibit optical artifacts; in combination with a pupil self-adaptive modulation layer and a task mode switching module, dynamic response of light and a visual task is realized; on the design, based on individual physiological parameters, a multi-objective genetic algorithm is iteratively calibrated, and the peripheral retina contrast control efficiency is improved by more than three times, while the central area contrast loss is less than 5%, so that high-precision, personalized and all-weather myopia control effect is realized.

The invention discloses a myopia prevention and control composite out-of-focus lens which comprises a central vision area and a peripheral out-of-focus area. Wherein the peripheral defocusing area comprises a micro lens array layer arranged on the front surface of the lens and an adaptive curved surface layer arranged on the rear surface of the lens; the micro-lens array layer comprises a plurality of micro-lenses which are arranged in an annular array by taking the central visual area as an original point, the defocusing amount of the micro-lenses is gradually increased in a gradient manner from the center to the periphery, and after being refracted by the micro-lenses, defocusing light rays are projected to the peripheral retina at a preset incident angle; the adaptive curved surface layer is an asymmetric free-form surface designed based on the eye nasal side and temporal side retina out-of-focus sensitivity difference and 3D corneal topography data. By controlling the defocusing amount and the light incidence angle of the micro lens, it is ensured that a defocusing signal is accurately projected to an effective area around the retina, and stable myopic defocusing is formed. The asymmetrical free-form surface enables the nose side to obtain more defocusing compensation, thereby being more in line with the physiological characteristics of human eyes, and improving the effectiveness of the defocusing effect and the wearing comfort.