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50 results about "Multifocals" patented technology
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Multi-focus optical lens
Owner:YONGHAO OPTIC&ELECTRONIC CO LTD (CHINA)
Multi-focus contact lens prediction system based on machine learning
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.
Owner:SHENYANG KANGENDE MEDICAL SCI & TECH CO LTD
Progressive multi-focus optical correction method based on peripheral defocus principle
The invention discloses a peripheral defocus principle-based progressive multi-focus optical correction method, which belongs to the technical field of vision correction and comprises the following steps of S1, collecting eye data of teenagers; s2, eye biological parameters are extracted; s3, calculating the change relation between the center defocusing amount and the peripheral defocusing amount under the dynamic change of different field angles and different pupil diameters; s4, presetting a target center defocusing amount and a peripheral defocusing amount of the progressive multi-focus lens under different field angles and different pupil diameter dynamic changes, and calculating a difference value between the target center defocusing amount and the peripheral defocusing amount under different field angles and different pupil diameter dynamic changes of eyes as a to-be-adjusted defocusing amount; s5, calculating parameters of the progressive multi-focus lens; s6, constructing a progressive multi-focus lens model; s7, optimizing the progressive multi-focus lens model; s8, performing optical correction by using the optimized progressive multi-focus lens model; the traditional Chinese medicine composition has a treatment effect and a prevention and control effect at the same time.
Owner:ZHUHAI HENGJIUTANG HEALTH MANAGEMENT CO LTD
Hybrid boundary contour line design method for progressive multi-focus ophthalmic lens
The invention discloses a method for designing a mixed type boundary contour line of a progressive multi-focus ophthalmic lens, and belongs to the field of design of progressive multi-focus ophthalmic lenses. The method comprises the following steps: constructing a Laplacian equation, and selecting a mixed rectangular boundary as a boundary of the Laplacian equation; two nodes with adjustable positions are arranged on the right side edge of the second rectangular boundary; solving a Laplacian equation for the second rectangle by adopting a finite element method, and carrying out interpolation to obtain a contour line numerical matrix solution of the second rectangle; and combining the contour line numerical solutions of the first rectangle, the second rectangle and the third rectangle to obtain a contour line function numerical matrix solution of the hybrid rectangular region. According to the invention, the contour line mixed type boundary design method is utilized to greatly improve the use range of the far vision area and the near vision area of the ophthalmic lens again, reduce the astigmatism area and improve the optical performance of the lens; the contour line mixed type boundary design method provided by the invention can also be applied to the personalized design aspect of progressive multi-focus spectacle lenses.
Owner:NANTONG UNIV
Intraocular lens with focal performance tailored to pupil size deploying refractive power modification along spiral tracks
A new family of intraocular lenses that exhibit an extended depth of focus or a tailored multifocality where the lenses are designed by the combination of a base lens topology and additional refractive power range described along a spiral-like grid. The variety of parameters confer a great versatility to the lens design, which allows the achievement of the best suitable features to attend to a wide range of visual demands in performing different activities. It is possible to set the parameters to specify apt-focal lenses that account for optical performance changes due to pupil aperture variations, as well as to counter positive dysphotopic effects.
Owner:RAYNER INTRAOCULAR LENSES LTD
Adaptive multifocal diffractive ocular lens
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).
Owner:VSY BIYOTEKNOLOJI VE ILAC SANAYI AS
Design method of double-sided progressive multi-focus lens
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.
Owner:JIANGSU SHENGPU OPTICAL TECH CO LTD
Multifocal diffractive ophthalmic lens using suppressed diffractive order
A multifocal ophthalmic lens includes an ophthalmic lens and a diffractive element. The ophthalmic lens having an anterior surface and a posterior surface; and the diffractive element disposed on at least one of the anterior surface and the posterior surface, the diffractive element including a plurality of annular diffractive steps and four consecutive diffractive orders. The ophthalmic lens produces a near focus, an intermediate focus, and a distance focus each corresponding to a different one of the four consecutive diffractive orders; and the plurality of annular diffractive steps of the diffractive element are configured such that one of the four diffractive orders is suppressed and at least a portion of the energy associated with that suppressed diffractive order is redistributed to one of the near focus, the intermediate focus, and the distance focus.
Owner:ALCON INC
Systems and methods for predicting contact lens compatibility using machine learning
A system and method for determining compatibility between multifocal contact lenses and patients seeking presbyopia vision correction includes: receiving a request from a first device associated with a first ophthalmic care professional to select a contact lens for a consumer, wherein the request includes biometric / refractional information associated with the consumer; obtaining a performance metric associated with the first ECP; determining a customized compatibility index using the machine learning model and based on the performance metric, the customized compatibility index indicating compatibility between a specific contact lens and the consumer for the first ECP; and presenting a report indicating the compatibility index on the first device. Additional systems, methods, and non-transitory machine-readable media are also provided. The idea is to replace or at least supplement the work of ophthalmologists with automated systems.
Owner:ALCON INC
Intraocular pseudophakic contact lens with mechanism for securing by anterior leaflet of capsular wall and related system and method
An apparatus includes an intraocular pseudophakic contact lens having an optical lens formed of a lens material and multiple haptics radially extending from a peripheral edge of the optical lens and configured to be inserted under an anterior leaflet of a capsular wall in an eye in order to capture and confine the haptics under the anterior leaflet. The haptics include the lens material. Anterior surfaces of the haptics are configured to contact an inner capsular wall surface at the anterior leaflet. The anterior surface of each haptic is continuous with an anterior surface of the optical lens. Posterior surfaces of the haptics include ridges configured to contact at least one edge of an artificial intraocular lens and capture the artificial intraocular lens between the ridges. At least a portion of the posterior surface of each haptic is positioned below a posterior surface of the optical lens. The optical lens is multi-focal.
Owner:ONPOINT VISION INC
Systems and methods for using machine learning to predict contact lens compatibility
Systems and methods for determining a compatibility between a multi-focal contact lens and a patient seeking presbyopia vision correction include receiving, from a first device associated with a first eye-care professional (ECP), a request for selecting a contact lens for a consumer, wherein the request comprises biometric information associated with the consumer; obtaining a performance metric associated with the first ECP; determining, using the machine learning model and based on the performance metric, a customized compatibility index indicating a compatibility between a particular contact lens and the consumer for the first ECP; and presenting a report indicating the compatibility index on the first device. Additional systems, methods, and non-transitory machine-readable mediums are also provided.
Owner:ALCON INC
Multifocal contact lens displaying improved vision attributes
Described are multifocal contact lenses that contain high energy visible (HEV) light absorbing compounds and their use for improving one or more vision attributes.
Owner:JOHNSON & JOHNSON VISION CARE INC
Multifocal lens
A multifocal lens (1) with at least three main refractive powers (DF, DM, DN) has a plurality of concentric, mutually adjacent annular main zones (Zi), each of which is divided into an inner and an outer annular subzone (2, 3) of different refractive powers (D1, D2), wherein the lens (1) is free of geometric steps between all subzones (2, 3), wherein the refractive powers (D1) of all inner subzones (2) are equal to one another and the refractive powers (D2) of all outer subzones (3) are equal to one another, and wherein all inner and outer subzones (2, 3) share their respective main zone (Zi) in an equal area ratio which is in the range from 30:70 to 70:30.
Owner:TELEON HLDG BV
Progressive multi-focus multi-point out-of-focus convergence lens and design method thereof
The invention discloses a progressive multi-focus multi-point out-of-focus convergence lens and a design method thereof, and relates to the technical field of lenses. Comprising a lens base body, the upper portion of the lens base body is a high-beam light area, the lower portion of the lens base body is a low-beam light area, and the high-beam light area and the low-beam light area are connected through a progressive channel with diopter changing in the vertical direction; a plurality of convex micro-lens units are distributed in areas except the bright vision areas of the far-distance light area, the progressive channel and the near-distance light area, and the optical axes of the convex micro-lens units deflect towards the corresponding optical centers according to the areas where the convex micro-lens units are located: the convex micro-lens units located on the bitamporal side and the nasal side deflect towards the geometric center of the lens, and the convex micro-lens units located around the far-distance light area deflect towards the optical center of the far-distance light area; the near light area is located around the near light area and deflects towards the optical center of the near light area, so that near-sighted out-of-focus arc areas converged in front of the retina are formed in the respective areas respectively; through the partition convergence type defocus structure, accurate myopia defocus signals can be provided at all distances of seeing far, middle and near, and myopia prevention and control are realized.
Owner:马卫国
MULTIFOCAL OPHTHALMIC LENS AND ASSOCIATED PROCEDURES
Owner:COOPERVISION INT LTD
Annular pupil independent ophthalmic lens
A transmissive ophthalmic lens has a first surface opposite a second surface. The first surface includes a centrally disposed diffractive multifocal zone surrounded by a peripherally disposed refractive zone. The second surface is a refractive surface that can be non-multifocal or multifocal surface where each may include toric. The diffractive multifocal zone is no more than 2.5 millimeters in diameter producing a far focus and an Add focus and no less than 1.5 mm. A first groove and a second groove of the diffractive multifocal zone may be the only two grooves. A smoothened transition may be disposed between the two consecutive grooves and may include a refractive segment connected to each groove by a step. The diffractive multifocal surface has a base surface that may be monofocal or multifocal surface where each may include toric. The grooves may be configured for minimum spherical aberration at the Add focus.
Owner:PORTNEY VALDEMAR +1
Optical bench tester for multifocal IOL
An optical bench tester for a multifocal intraocular lens is disclosed. An optical bench tester for a multifocal intraocular lens according to an aspect of the present disclosure may include a resolution test chart; a plurality of optical systems that refract images irradiated from the resolution test chart; an electrically driven liquid lens unit provided at the rear of the optical system to control the refraction of light passing through; a model eye having a multifocal intraocular lens on which light transmitting through the electrically driven liquid lens unit is incident; a camera that captures light transmitted through the model eye; and a control unit that controls the electrically driven liquid lens unit to control the refractive index of the electrically driven liquid lens unit, and calculates a defocus curve by analyzing images captured through the camera.
Owner:THE CATHOLIC UNIV OF KOREA IND ACADEMIC COOP FOUND
Multifocal ophthalmic lens with extended depth-of-focus
An ophthalmic lens includes an optic having a first surface and a second surface disposed about an optical axis. At least one of the first surface and the second surface includes a surface profile having a base curvature and a plurality of zones. The base curvature corresponds to a base optical power. The plurality of zones is adapted to produce a plurality of curves corresponding to light energy distribution along the optical axis. The surface profile includes a plurality of adjustments providing an extended depth-of-focus, the plurality of adjustments being adapted to extend each one of the plurality of curves towards another of the plurality of curves. The plurality of adjustments may include at least one spherical aberration. The plurality of adjustments may include at least one longitudinal chromatic aberration. The plurality of adjustments may include at least one phase shift change.
Owner:ALCON INC
Machine learning based multifocal contact lens prediction system
A personalized multifocal contact lens for treating presbyopia takes into account various relevant clinical patient measures including patient clinical data (2123) and lifestyle data (2122) to determine which lens will likely provide the new patient with a personalized lens parameter. The system is trained using historic patient clinical data (2123) and lifestyle data (2122) to predict which manufactured multifocal lens (i.e., a lens comprising lens design and having a lens geometry and optical power) will result in a lens with an optimum lens to eye relationship and optimum visual performance for each eye of a patient with presbyopia.
Owner:SHENYANG KANGENDE MEDICAL SCI & TECH CO LTD
A method for regionally optimizing astigmatism in a progressive multifocal ophthalmic lens
This invention relates to an optimization method for progressive multifocal lenses. First, a portion of the progressive multifocal lens surface is replaced by a linear superposition of that area and a spherical surface. The spherical surface used is the one whose boundary is closest to the boundary of the replaced lens area, calculated using the least squares method. Then, Zernike polynomials are used to selectively fit the surface elevation of the replaced lens, further smoothing the progressive multifocal lens surface. This invention can control the optical power and astigmatic distribution in the astigmatic region of the progressive multifocal lens surface by changing the location and range of the region, thereby improving surface astigmatism and helping wearers obtain a better visual experience.
Owner:SUZHOU UNIV OF SCI & TECH
IMPROVED IMAGING BASED ON A MULTIFOCAL NON-PARALLEL COLLIMATOR
Owner:SIEMENS MEDICAL SOLUTIONS USA INC
Progressive multifocal ring focus / defocus convergence lens
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.
Owner:马卫国
Diffractive multifocal small aperture ophthalmic lens
A transmissive ophthalmic lens has a first surface opposite a second surface. The first surface includes a centrally disposed diffractive multifocal zone surrounded by a peripherally disposed refractive non-multifocal zone. The second surface is a refractive non-multifocal surface. The refractive non-multifocal zone forms the far focus. The diffractive multifocal zone is no more than 2.5 millimeters in diameter to produce a far focus and an Add focus and no less than 1.5 mm in diameter for Multipeak performance. A first groove and a second groove of the diffractive multifocal zone may be the only two grooves. At least 20% of light is directed within the diffractive multifocal zone to one of the far and the Add focus. The diffractive multifocal zone may have a base curve that together with a peripheral zone is bi-sign aspheric around far focus and aspheric grooves configured for minimum spherical aberration at the Add focus.
Owner:PORTNEY VALDEMAR +1
Multifocal ophthalmic lens
Examples of a multi-focal ophthalmic lens are provided in this document. The lens includes: a base lens having a base arc corresponding to a base power; and a diffractive structure including a plurality of annular echelle gratings, the plurality of annular echelle gratings being formed on the first surface of the base lens. The diffractive structure is configured to produce: a zero order diffraction corresponding to a distant focus determined by a base power, the diffraction efficiency of the zero order diffraction being between 45% and 55%; first-stage diffraction, wherein the diffraction efficiency of the first-stage diffraction is between 5% and 10%; the second-stage diffraction corresponds to the focus in vision, and the diffraction efficiency of the second-stage diffraction is between 15% and 20%; and the third-stage diffraction corresponds to the perifocus, and the diffraction efficiency of the third-stage diffraction is between 15% and 25%. The diffractive structure includes a plurality of annular diffractive steps, each annular diffractive step defined by a profile having a curved ramp and a peak.
Owner:ALCON INC
Intelligent glasses with multi-focus glasses lenses
Owner:SHANXI RUISHILI TECH CO LTD
Presbyopia correction lens system with design dependent on correction of farsightedness / nearsightedness
A presbyopia-correcting multifocal contact lens system with a design dependent on refractive error correction for hyperopia / myopia. A multifocal contact lens is part of a multifocal contact lens system ("lens system") that includes multiple myopia-correcting and hyperopia-correcting lenses, each lens having an additional optical area for presbyopia correction, selected based on refractive errors, and fitted to the wearer, who is the patient. To improve far-distance visual acuity in hyperopia, the spherical aberration (SPHA) profile, additional optical area diameter, and / or additional refractive power of the hyperopia-correcting lens within the lens system are optimized based on the hyperopia patient characteristics, which may differ from the myopia patient characteristics used to optimize the myopia-correcting lens within the lens system. Such design optimization may also depend on refractive error for further enhanced far-distance visual acuity.
Owner:JOHNSON & JOHNSON VISION CARE INC
Optimized multifocal wavefront for presbyopia correction
Example embodiments include methods for forming sub-surface optical structures in ophthalmic lenses. A method may include defining a phase wrapped wavefront for an ophthalmic lens to diffract light to a plurality of focal points; defining a spherical wavefront configured to induce spherical aberration in the ophthalmic lens; and generating, based on the wavefront, an energy output parameter for forming a sub-surface optical structure in the ophthalmic lens using an energy source, where the sub-surface optical structure is configured for correcting presbyopia by providing an extended depth of focus that results in increased mid-vision quality. Also disclosed is an ophthalmic lens having a Fresnel earring that causes a phase wrapped wavefront with spherical aberration.
Owner:CLERIO VISION CO LTD
Dynamic diffractive tear- and blink-driven multifocal contact lens
This disclosure describes systems and methods for treatment of presbyopia using contact lenses that include a plurality of diffractive elements on the front surface of the lenses. The diffractive elements are step wise features that create cavities between each of the plurality of diffractive elements. When the lens is placed on an eye, the tear film will fill the cavities with tear fluid, which will shift the impact of the diffractive elements and the majority of the light passing through the pupil will be focused at a distance. For example, immediately following a blink, the tear film will increase and the cavities will fill with tear fluid, which will have a diffractive effect that improves distance viewing. When the tear film starts to thin, and the cavities between the diffractive elements are exposed to air, the light distribution will shift towards the near focus and improve the near image.
Owner:TEAROPTIX INC
Intelligent zoom glasses
ActiveCN224203528UEasy to adjustimprove acuityNon-optical adjunctsEye exercisersOphthalmologyEyewear
The utility model belongs to the technical field of glasses equipment, and provides intelligent zoom glasses which comprise a glasses frame body, and a left glasses assembly and a right glasses assembly which are symmetrically arranged on the front side of the glasses frame body left and right, the left lens assembly is provided with a left lens with multiple focuses, the right lens assembly is provided with a right lens with multiple focuses, and the left lens assembly and the right lens assembly are arranged on the left side and the right side of the front portion of the lens frame body in a reciprocating rotation mode respectively so that zoom adjustment can be achieved by rotating the left lens assembly and / or the right lens assembly. According to the intelligent zoom glasses provided by the utility model, the lenses capable of rotating in a reciprocating manner are arranged to realize zoom adjustment and promote self-adjustment of ciliary muscles, so that the effect of exercising the ciliary muscles is achieved, and the adjustment capability and the acuity of the ciliary muscles are improved.
Owner:MUAN MEDICAL TECHNOLOGY (RIZHAO) CO LTD