34 results about "Spherical power" patented technology

This method for calculating curvature of an arbitrarily defined range of an optical element includes: a step (a) for obtaining a lateral vector s of an element number n representing a local curvature distribution in an arbitrarily defined range of the optical element; and a step (b) for, when an average spherical power in a prescribed light flux range within an arbitrarily defined range is defined as a macro curvature c, calculating the macro curvature c without using wavefront information in the arbitrarily defined range by using a weighting vector w with which an approximate expression of c ≈ wsT is satisfied.

The invention provides a three-dimensional eyeball form noninvasive evaluation method and system based on multi-modal fundus features, and relates to the technical field of medical image analysis, and the method comprises the steps: obtaining a color fundus image through a non-contact fundus camera, and collecting the equivalent spherical power, age and gender data of a patient; segmenting the image by using a U-Net network, extracting various geometric and blood vessel features, correcting the image and normalizing data; eliminating diopter interference by adopting a mixed effect linear regression model, and screening target features; related parameters are calculated based on the MRI image, and a deep learning model is used for training prediction; inputting to-be-evaluated data to obtain a result, evaluating the myopia complication risk according to the result, and providing personalized eye health management suggestions. According to the method, through combination of multi-mode fundus feature analysis and deep learning, non-invasive, low-cost and high-precision three-dimensional eyeball shape evaluation is realized, the myopia complication risk can be effectively predicted, and a personalized eye health management scheme is provided.

A sensitivity evaluation method includes: causing a wearer to view a target through a lens or a lens group capable of controlling at least one optical property among a spherical power, a cylindrical power, and an astigmatic axis angle; and acquiring information about a sensitivity of the wearer with respect to an aberration.

The utility model discloses a microstructure out-of-focus lens capable of reducing phase mutation at the periphery of a microstructure, which comprises a substrate and a functional area adsorbed on the substrate, the functional area comprises a central area and an out-of-focus functional area, the out-of-focus functional area surrounds the central area, the out-of-focus functional area comprises a plurality of microstructures, and the microstructures are arranged in the central area. The periphery of each microstructure is surrounded by a phase mutation reduction area, the phase mutation reduction areas cover the peripheries of the microstructures and local areas of the microstructures, the phase mutation reduction areas are arranged outwards in the radial direction by taking the centers of the microstructures as original points, the initial positions are not lower than 0.2 times of the diameters of the microstructures, and the final positions are not higher than 3 times of the diameters of the microstructures; and structures for preventing direct transmission of light rays are distributed in the phase mutation reduction area. According to the microstructure out-of-focus lens capable of reducing the peripheral phase mutation of the microstructure, provided by the utility model, the fundus high-frontal spherical power and cylindrical power caused by the peripheral phase mutation of the microstructure can be reduced, the comfort of a wearer is improved, and the myopia management efficiency is improved.

An electronic device may include a variable focus camera that is used during lens measurement operations. During the lens measurement operations, the variable focus camera may capture images of one or more targets with and without an intervening lens. Focus information obtained by the variable focus camera may be used to determine the spherical power, the cylindrical power, and the cylindrical axis of the lens. The focus information may be obtained using a frequency sweep while capturing images of a single target. Alternatively, the focus information may be obtained by performing autofocus operations while focusing on different targets. Based on the determined spherical power, cylindrical power, and cylindrical axis of the lens, the electronic device may output lens information using a display, a speaker, or communications circuitry.

The system includes a series of contact lenses having at least one cylindrical power across a plurality of spherical powers, each lens having a stabilization region positioned on the front surface outside the viewing region. For each cylindrical power within the series there is a set of lenses comprising: a first lens having only a spherical power in the central optical region and having a first maximum thickness of a stable region, and a second lens having a second maximum thickness of a stable region; the first maximum thickness is designed such that a first population with a first eyelid pressure provides a predetermined angular recovery response and rotational stability on the eyes; and the second lens has first spherical focal power and second spherical focal power so as to correct presbyopia. The second lens has a maximum thickness greater than the first thickness, the maximum thickness being designed such that a second population having an eyelid pressure less than or equal to 70% of the first eyelid pressure provides an angular recovery response and rotational stability at least as good as the predetermined angular recovery response and rotational stability of the first lens.

The invention relates to a post-ciliary muscle paralysis spherical power prediction method based on feature conversion and screening, and belongs to the technical field of electronic information. The method comprises the following steps: acquiring a clinical data sample, performing feature conversion to obtain parameter features related to a crystalline lens, and performing feature screening by using LASSO; an XGBoost model is utilized to train and predict the spherical power S after ciliary muscle paralysis and the cylindrical power C before ciliary muscle paralysis, and the performance of the model is evaluated according to MSE, RMSE, MAE and R2; calculating the equivalent spherical power SE after ciliary muscle paralysis according to the S and the C predicted by the XGBoost model; the anterior segment optical coherence tomography scanner is used for shooting crystalline lens images under different adjustments to clinically verify the change of the crystalline lens diopter caused by the change of the anterior surface diopter of the crystalline lens, namely the physical model used in the invention. According to the method, high-accuracy S prediction after ciliary muscle paralysis is realized, and side effects caused by ciliary muscle paralysis examination are avoided.

An electro-active lens with stacked, rotated cylindrical electro-active lens elements can provide cylinder power along more axes than there are cylindrical electro-active lens elements. For instance, six stacked cylindrical electro-active lens elements, each aligned with a different lens meridian, can produce cylinder power along fifteen unique meridians when actuated up to three at a time. If these meridians are spaced at 12° increments, then the lens stack can provide cylinder power that is aligned well to correct astigmatism along any axis. Each cylindrical electro-active lens element in the stack can include a liquid crystal layer that is actuated by linear electrodes that are parallel to each other and orthogonal to both the cylindrical electro-active lens element's cylinder axis and optical axis. The electro-active lens can also include a spherical lens element that provides spherical power in addition to any net spherical power produced by the stacked cylindrical electro-active lens elements.

1. Name of the product in this design: Intelligent Surface Measuring Instrument. 2. Purpose of this design: To measure and test the optical properties of lenses, such as spherical power, cylindrical power, and prism power. 3. The key design points of this product are: the shape of design 1, and the shapes, colors, and combinations of design 2 and 3. 4. The picture or photo that best illustrates the key design points: Design 1 3D diagram 1. 5. Design 1 is designated as the basic design. 6. Other situations requiring explanation: Other explanation: Designs 2 and 3 for which protection is sought include color.

Disclosed embodiments include means and methods of automatically measuring numerous characteristics of an optical system, such as an eye. Measured or displayed optical properties may include but are not limited to. spherical power, cylinder and axis for astigmatism. Higher order optical aberrations may also be measured. Disclosed embodiments may be used to measure refraction for creating corrective lenses for eyeglasses and contact lenses. Measurements of higher order aberrations of an eye may be used for measuring enhanced correction, accommodation state and range.

A near-eye display system includes: a first corrective optical element having a first power contribution operable to converge or diverge a real-world image-bearing beam to a first focus distance before an eye box, and a second corrective optical element having a second power contribution operable to converge or diverge the real-world image-bearing beam to a second focus distance before the eye box; and a second correction optical element disposed between the first correction optical element and the eye box. The second corrective optical element has a spherical power contribution operable to converge or diverge the virtual and real world image bearing beams to a second focus distance before the eye box. The first correction optical element has a first correction center, and the second correction optical element has a second correction center.

An electronic device may include a display and a lens module through which the display can be viewed. The lens module may include a tunable lens having an adjustable spherical power, a lenticular axial position, and / or a lenticular power. To adjust the tunable lens to compensate for the viewer's vision, the display may present at least one target. An optical power of the tunable lens may be set based on a gaze point relative to the at least one target. A plurality of targets having associated powers may be presented, and the power of the tunable lens may be set according to which target is aligned with the gaze point. The display may present an image through a mask layer having rings of pinhole pairs. The electronic device may include an input device that receives a user input regarding a perceived image associated with the display and the mask layer.

Disclosed embodiments include means and methods of automatically measuring numerous characteristics of an optical system, such as an eye. Measured or displayed optical properties may include but are not limited to. spherical power, cylinder and axis for astigmatism. Higher order optical aberrations may also be measured. Disclosed embodiments may be used to measure refraction for creating corrective lenses for eyeglasses and contact lenses. Measurements of higher order aberrations of an eye may be used for measuring enhanced correction, accommodation state and range.

The system includes a series of contact lenses having at least one cylindrical power across a plurality of spherical powers, each lens having a stabilization region positioned on the front surface outside the viewing region. For each cylindrical power within the series there is a set of lenses comprising: a first lens having only a spherical power in the central optical region and having a first maximum thickness of a stable region, and a second lens having a second maximum thickness of a stable region; the first maximum thickness is designed such that a first population with a first eyelid pressure provides a predetermined angular recovery response and rotational stability on the eyes; and the second lens has first spherical focal power and second spherical focal power so as to correct presbyopia. The second lens has a maximum thickness greater than the first thickness, the maximum thickness being designed such that a second population having an eyelid pressure less than or equal to 70% of the first eyelid pressure provides an angular recovery response and rotational stability at least as good as the predetermined angular recovery response and rotational stability of the first lens.

The optical assembly includes a support structure, several lens elements configured to provide overall cylindrical and spherical power. At least one actuating unit 8 is configured to laterally shift a

The application belongs to the technical field of computers and relates to an intelligent lens data management method, which comprises the following steps: obtaining the unique identification, the degree step unit and the degree range information of a lens to be managed; configuring a two-dimensional rectangular coordinate system with spherical power and cylindrical power as coordinate axes according to preset coordinate axis configuration information; generating a target visualized graph corresponding to the lens to be managed in the two-dimensional rectangular coordinate system according to the degree range information; determining effective degree information corresponding to the lens to be managed according to the degree step unit and the vertex coordinate set of the target visualized graph; and storing the target visualized graph and the effective degree information in association with each other according to the unique identification. The application also relates to an intelligent lens data management system, a computer device and a storage medium. The application defines the available degree combination range of a lens through a coordinate system and a visualized graph, thereby effectively improving the management efficiency of lens data.

The present invention discloses a method for detecting the refractive power distribution of a free-form surface of an ophthalmic lens, a terminal device, and a medium. The method includes: controlling an illumination module to emit uniform illumination light to illuminate the frosted bottom surface of an optical long glass body, using a focusing imaging module to image the frosted bottom surface, and obtaining an image sequence of the frosted bottom surface by adjusting the position of a focusing lens in the focusing imaging module; obtaining a curve of the clarity of images at different positions of the frosted bottom surface changing with the position of the focusing lens according to the image sequence of the frosted bottom surface; determining the refractive compensation differences at different positions of the frosted bottom surface according to the maximum value of the curve, and combining the position correspondence relationship between the to-be-tested free-form surface lens and the frosted bottom surface to obtain the refractive information of different regions of the to-be-tested free-form surface lens, where the refractive information includes spherical power, cylindrical power, and axis. The present invention can achieve accurate and efficient detection of free-form surface lenses.

The invention relates to an optometry system comprising a computer having one or more processors, the one or more processors are programmed to: a) control the optometry device to determine a photopic vision value of the vision correction power of the correction lens for each eye of the individual by implementing a photopic vision subjective refractive test in photopic vision, or to retrieve an initial vision correction value stored in a memory of the optometry system, or collecting initial vision correction values, b) a step of verifying the placement of the eye of the individual under light conditions ensuring scotopic vision of the eye of the individual for an amount of time, c) a step of verifying the placement of the eye of the individual under light conditions ensuring mesopic vision of the eye of the individual, and d) a step of controlling the optometry device to achieve a mesopic vision subjective refractive test, the meso-vision subjective refractive test comprises: blurring the eyes with a predetermined clouding spherical power, iteratively adding to the eyes a predetermined spherical power negative value identical to the clouding test value and determining the meso-vision binocular visual acuity of the eyes until a maximum value of the meso-vision binocular visual acuity is reached, and determining the meso-vision binocular visual acuity of the eyes until the maximum value of the meso-vision binocular visual acuity is reached. A mesopic raw value of vision correction power is determined for each eye, e) determining a mesopic value of vision correction power based on the mesopic raw value of vision correction power.

An apparatus may include a viewing optic. The viewing optic may include a first rotatable phase plate, a second rotatable phase plate, and an adjustable focus device. The viewing optic may be configured to image light from a display, the imaged light having a spherical power, a cylindrical power, and a cylindrical axis. The spherical power, the cylindrical power, and the cylindrical axis of the imaged light may be controlled by adjusting the adjustable focus device, rotating the first rotatable phase plate, and rotating the second rotatable phase plate. Other devices, apparatuses, systems, and methods of manufacture are also disclosed.

The invention discloses a diopter detection optical adjustment system based on multi-sensor feedback, particularly relates to the field of optical adjustment, and comprises a control module, a detection light path module, a focal length adjustment module and an optical adjustment module. Detection light is projected to a detected optical target through the detection light path module, reflected light of the detected optical target is received through the imaging sensor, a digital image is obtained finally, image analysis is carried out on the digital image, the image definition is calculated accordingly, traditional global search is optimized into local accurate search through an algorithm for predicting the optimal starting point, and the precision of the target is improved. In combination with an intelligent search strategy based on fuzzy adaptive variable step size, an optimal focusing position can be quickly locked, a rough range can be quickly positioned, then fine focusing is carried out, double requirements of a complex optical system for large-range compensation and fine calibration are met, and the spherical power, the cylindrical power and the astigmatism axis position are adjusted to be the same as those of the spherical power, the cylindrical power and the astigmatism axis position on the basis of the optimal focusing position. And optical adjustment is carried out, so that full-closed-loop control from detection to adjustment is completed.

The invention belongs to the technical field of computers, and relates to an intelligent lens data management method, which comprises the following steps: acquiring a unique identifier, a degree stepping unit and degree range information of a to-be-managed lens; configuring a two-dimensional rectangular coordinate system by taking the spherical power and the cylindrical power as coordinate axes according to preset coordinate axis configuration information; according to the degree range information, generating a target visual graph corresponding to the to-be-managed lens in the two-dimensional rectangular coordinate system; according to the degree stepping unit and the vertex coordinate set of the target visual graph, effective degree information corresponding to the to-be-managed lens is determined; and according to the unique identifier, associatively storing the target visual graph and the effective degree information. The invention further relates to an intelligent lens data management system, computer equipment and a storage medium. According to the method, the available degree combination range of the lens is defined through the coordinate system and the visual graph, so that the management efficiency of the lens data is effectively improved.

The present application relates to a toric intraocular lens comprising an optical portion having an anterior optical surface and a posterior optical surface and a haptic supporting the optical portion, at least one of the anterior optical surface and the posterior optical surface being a toric surface, the method comprises the following steps: firstly setting a group of initial values of a shape factor of an optical part, then calculating the focal power of an optical surface according to target equivalent spherical power and the initial values, calculating the curvature radius of a toric surface according to the obtained focal power and target cylindrical power, and then judging whether the obtained toric surface meets the imaging quality requirement or not through a modulation transfer function. If the imaging quality requirement is met, the corresponding shape factor value is selected, and if the imaging quality requirement is not met, the shape factor value is reset, and the previous steps are repeated. The invention further provides a method for designing the toric intraocular lens.

The invention relates to an ophthalmic lens (10) having a rotating point and a vertical line (VL) passing through said rotating point, and providing at a far vision point (FVP) at least a non-zero cylindrical power oriented according to a nominal cylinder axis relative to said vertical line and in a near vision area (11) a non-zero addition of spherical power. According to the invention, said ophthalmic lens is suitable for a range of prescriptions of cylinder axis of at least 20° about said nominal cylinder axis.

The invention provides an rs10045697 related SNP (Single Nucleotide Polymorphism) marker combination for predicting high myopia risk and susceptibility based on an equivalent spherical mirror and application of the rs10045697 related SNP marker combination, and relates to the field of biological medicines. Specifically, a key SNP marker rs10045697 and a plurality of SNP loci related to high myopia are screened based on equivalent spherical power in a high myopia queue through genome-wide association study (GWAS), and a model constructed based on the SNP marker combination can realize risk stratification and susceptibility detection of high myopia. The method is suitable for ophthalmology screening, high-risk group identification and accurate prevention and control intervention, and has important clinical transformation value.

The system comprises three optical elements arranged along an optical axis, each optical element having a different cylindrical axis and a variable cylindrical power. The three elements together form a composite optical element having an overall spherical power (SPH), a cylindrical power (CYL) and a cylindrical axis (Axis) which can be varied according to a prescription (Rx).

Systems and methods for variable astigmatism correction in a head mounted display are disclosed. An apparatus may include viewing optics. The viewing optics may include a first rotatable phase plate, a second rotatable phase plate, and an adjustable focus device. The viewing optics may be configured to image light from the display, the imaged light having a spherical power, a cylindrical power, and a cylindrical axis. The spherical focal power, the cylindrical focal power and the cylindrical axis of the imaging light can be controlled by adjusting the adjustable focal length device, rotating the first rotatable phase plate and rotating the second rotatable phase plate. Other apparatus, devices, systems, and methods of manufacture are also disclosed.

The embodiment of the present application provides a multi-axial progressive defocus lens and glasses, the multi-axial progressive defocus lens comprises a lens body, the lens body comprises an optical center and an optical optimization region enclosed by the optical center; a plurality of virtual optical axes in different directions are defined on the lens body, the number of the virtual optical axes is 4n (n >= 1), a preset range of the optical center is taken as a starting defocus point, and the spherical power number gradually changes from the starting defocus power along the direction of each virtual optical axis. Therefore, the progressive defocus optical lens with the clear zone form or the area that can be designed is formed, different visual angles are respectively corresponding to each axis, the visual field distortion and the visual aberration at the edge of the lens can be greatly reduced, and the lens has a wide and clear visual field.

Described herein are soft contact lens sets and methods of designing soft contact lens sets based on incorporating different levels of spherical aberration into the lens design depending on the target spherical power. The different levels of spherical aberration are equal to or less than zero D / mm2, and account for clinically measured population-average ocular spherical aberration, manufacturing variations and generalized accommodative ability.

This invention relates to the field of progressive multifocal lens (PAL) design and manufacturing technology, specifically disclosing a method and system for designing freeform surfaces of progressive multifocal lenses. This method employs a curvature superposition (CS) algorithm instead of the traditional differential geometry (DG) algorithm, resulting in better consistency between the spherical power distribution and the design values. Based on this, a fast Fourier transform (FFT) is used to optimize the initial freeform surface, effectively reducing unwanted astigmatism and expanding the progressive corridor width, significantly enhancing visual function and wearing comfort. The manufactured product successfully replicates the simulated optical performance and maintains optimized characteristics even when combined with standard cylindrical astigmatism correction, proving the method's practicality and feasibility. This design method, combining the CS algorithm and FFT filtering, effectively improves the optical performance and wearing comfort of PAL, providing a new path for PAL design and optimization.

The present application provides a refraction test card and a test method thereof. The test card comprises a target in a black background, and a partition unit in the center of the target, which visually separates the target. The test method comprises: judging whether the subject has astigmatism according to the clarity of the contrast between the target and the black background in the astigmatism test card; if the subject is determined to have astigmatism, the astigmatism axis direction is determined; judging whether the subject has hyperopia or myopia according to the clarity of the contrast between the target and the black background in the spherical power test card; and testing and calculating the spherical power and astigmatism power of the subject. The present application provides a simple refraction test tool and method to determine whether the subject has refractive error, the type of refractive error and the quantitative refractive error.