24 results about "Refraction errors" patented technology

This application discloses a method and electronic device for predicting intraocular lens (IOL) selection and rotation implantation, relating to the field of computer technology. This application acquires the user's ocular biological measurement parameters and constructs an intraocular geometric constraint region. The IOL is abstracted as a rectangular geometries, generating a set of candidate size-axis positions. Each candidate option satisfies the geometric constraints of the patient's intraocular anatomy in terms of implantation position and rotation angle. Based on this, by combining the geometric fit indices of the candidate options with individualized ocular biological parameters, the postoperative arch height, the probability of abnormal arch height, and postoperative refractive results are predicted. After post-processing and calibration, outputs with confidence intervals or risk probabilities are provided. This eliminates reliance on experience or rough estimates for surgical planning, effectively reducing the risk of arch height deviation or postoperative refractive errors, providing the optimal IOL option, and achieving individualized, quantifiable, and predictable implantation planning.

The present disclosure pertains to the phakic refractive lenses such as toric lenses, an advanced posterior chamber floating phakic refractive lens (PRL) designed for the correction of severe refractive errors, including myopia, hyperopia, and astigmatism. This innovative lens can reduce or minimize complications commonly associated with traditional phakic intraocular lenses, such as intraocular pressure elevation, cataract formation, and iris pigment dispersion. The phakic refractive lenses such as the toric lenses described herein feature a buoyant, flexible structure with a central aperture to facilitate aqueous humor flow, creating a natural centering force that stabilizes the lens within the pupillary space.

This invention relates to the field of refractive error detection technology, and discloses a method, device, and medium for estimating refractive power based on infrared off-center photography images. The method uses infrared pupil images of each LED group in an array of LED beads when they are lit as feature images of each channel, forming a pupil feature image. This pupil feature image is input into the refractive error prediction model, where it is convolved through a residual convolutional layer to obtain a primary feature image. This primary feature image is then input into a relative orientation feature module to obtain a relative orientation feature image. The relative orientation feature image is then passed sequentially through multiple cascaded residual blocks to obtain residual features. These residual features are then passed through a global average pooling layer and fed into parallel and independent first and second fully connected layers to obtain predicted spherical and cylindrical refractive power values.

This invention belongs to the field of myopia prevention and control technology, and relates to a method, device, and medium for myopia prevention and control based on genetic and environmental factors. Based on myopia data of each blood relative of the user to be intervened, the variant sites in the myopia-related single nucleotide polymorphism genotype, and the number of risk alleles, a myopia genetic risk index is calculated. Based on the user's daily outdoor activity time, total daily eye use time, daily near-vision time, and daily low-light eye use time over several consecutive days, an outdoor activity stability index, a near-vision load index, and an eye use light stability index are calculated, thus obtaining an environmental myopia risk index. The axial length, refractive error, myopia genetic risk index, and environmental myopia risk index of the user to be intervened are input into an adaptive Bayesian myopia risk prediction model, which outputs the myopia risk change trajectory under different myopia intervention intensities, including the predicted mean and uncertainty interval, thereby obtaining a myopia intervention strategy.

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 present disclosure is directed to lens, methods of making, designing lens and / or methods using lens in which performance may be improved by providing one or more steps in the central portion of the optical zone and one or more steps in the peripheral portion of the optic zone. In some embodiments, such lens may be useful for correcting refractive error of an eye and / or for controlling eye growth.

This invention provides a myopia screening device. The first end of the housing is designated as the detection end for testing the subject's eyes. A visual target screen, a screening camera, and an optical path assembly are all housed within the housing. The visual target screen is located on one side wall of the housing, the optical path assembly is positioned between the detection end and the visual target screen, and the screening camera is located at the second end of the housing. The screening camera captures a light and shadow image of the subject's pupil. A processor processes and analyzes the light and shadow image captured by the screening camera. An input device communicates with the processor and inputs the image seen by the subject on the visual target screen into the processor. This invention enables not only refractive error testing but also visual acuity testing and color blindness / color weakness testing. Furthermore, this invention can estimate the subject's visual acuity based on the refractive error test results, generate a corresponding estimated visual target based on the estimated visual acuity, and quickly complete the visual acuity test, effectively shortening the visual acuity screening time.

The invention relates to a method for providing control data for an ophthalmic laser (12) of a treatment device (10). The method comprises, as steps: determining parameters of an epithelial layer and a stroma of a cornea (16); determining a correction profile (14) for correcting a refractive error of the cornea (16); determining data of a virtual postoperative cornea expected by treating the cornea (16) with the correction profile (14), wherein the data of the virtual postoperative cornea are determined as a function of an epithelial layer model in which epithelial regrowth of the cornea is modeled, wherein model parameters of the epithelial layer model are provided from statistics of epithelial regrowth processes of a given population group;a determination of a correction difference between an originally planned correction and a virtually achieved correction; an adjustment of the correction profile (14) depending on the correction difference; and a provision of the control data for the ophthalmic laser (12) that includes the adjusted correction profile.;

In certain embodiments, a surgical contact lens system for ophthalmic treatment with a laser beam includes a patient contact lens and a surgical contact lens. The patient contact lens reduces one or more refractive errors of the eye and has a concave surface and a convex surface. The concave surface is to be disposed outwardly from a cornea of an eye. The surgical contact lens has an eye end to be disposed outwardly from the convex surface of the patient contact lens. The surgical contact lens includes a frame and an optical component coupled to the frame. The patient contact lens reduces pressure from the surgical contact lens to reduce corneal folding of a posterior surface of the cornea. The optical component of the surgical contact lens and the patient contact lens transmit the laser beam to treat the eye.

The invention relates to a method for providing control data for an ophthalmic ablation laser (12) of a treatment device (10). The method comprises determining a laser pulse positioning inaccuracy based on a predetermined statistic of eye movements and a predetermined processing latency, wherein the processing latency comprises a latency of a camera device (24), a beam deflection device (22), and the ablation laser (12); determining an ablation volume (14) for correcting a refractive error as a function of the determined laser pulse positioning inaccuracy; and providing the control data for controlling the ablation laser (12), which includes the determined ablation volume (14).

A compact line- or full-field optical coherence tomography (OCT) system designed for high-resolution retinal imaging with reduced artifacts employs quarter wave plates in both the sample and reference arms to manipulate the polarization state of light, effectively suppressing spurious reflections and coherence repeat artifacts. A symmetrical arrangement of, for example, Plössl eyepiece and camera objective lenses minimizes optical aberrations and maintains a flat imaging field despite the retina's curvature. The scanning galvanometer mirror is positioned at the conjugate plane of the patient's eye pupil and sized to act as an aperture stop. An adjustable eyepiece compensates for individual refractive errors, enhancing image clarity across a wide range of patients.

This utility model discloses a protective cover for an oral scanner, including a main body. A rectangular through-hole is formed on the front surface of the main body near the upper end. A semi-circular groove is formed on the side of the main body. A circular through-hole is formed inside the rectangular through-hole. A lens adjustment mechanism is movably installed inside the rectangular through-hole. A slot is formed on the front surface of the main body near the lower end of the rectangular through-hole. This protective cover for an oral scanner, through the lens adjustment mechanism, allows the operator to adjust the tilt angle of the protective lens as needed and clamp it in place. This effectively reduces refraction errors, improves image quality, ensures accurate measurement by the oral scanner, and reduces the influence of the protective lens on the final scanning image result. The protective clip can be fitted and clamped onto the upper end of the oral scanner protective cover, making assembly and disassembly simple. It also seals the rectangular through-hole, preventing dust and foreign objects from adhering to the surface of the protective lens before use.

Described herein are systems and methods for refraction correction of OCT images configured for intraoperative use, including: a deep-learning model configured to receive a plurality of OCT images; and an imaging device configured to generate the plurality OCT images during an intraoperative procedure; wherein the deep-learning model is configured to map, in real-time, the plurality of OCT images to a two-dimensional vector field over a spatial domain of the plurality of OCT images; wherein the mapping is configured for real-time correction of refraction errors on the plurality of OCT images by employing Snell's law to generate a plurality of refraction-corrected OCT images via the deep-learning model. Other examples are described including features of the deep-learning model uniquely configured for interoperative usage such as an OCT image processing speed of 20Hz-50Hz.

The embodiment of the invention provides a lens module, intelligent wearable equipment and a working method thereof, relates to the technical field of display, and is used for inhibiting the development of ametropia. The lens module comprises a first electrode, a liquid crystal layer and a second electrode which are sequentially stacked, the lens module comprises a plurality of refraction units, and the lens module located in the refraction units has a first state and a second state. When the lens module located in the refraction unit is in a first state, a first angle is formed between at least part of liquid crystal molecules of the liquid crystal layer located in the refraction unit and the plane where the lens module is located, and the lens module located in the refraction unit has first refraction power. When the lens module located in the refraction unit is in a second state, at least part of liquid crystal molecules of the liquid crystal layer located in the refraction unit and the plane where the lens module is located form a second angle, and the lens module located in the refraction unit has second refraction power; wherein the first angle is different from the second angle, and the first refractive power is different from the second refractive power.

The application discloses a plane prescription microstructure closed-loop manufacturing system and process based on profile-wavefront applied to the field of optical manufacturing and measurement, obtains prescription parameters, manufacturing constraints and assembly constraints, generates a target two-dimensional phase field and height field and initializes manufacturing control parameters, obtains profile measurement and wavefront measurement data at the manufacturing-measurement acceptance link, calculates wavefront RMS and refractive error vectors, executes defect detection and reason code classification, carries out error attribution and backfills two-dimensional dose field, focal point offset, LUT / FEM and other control quantities, and outputs an acceptance report and a traceable data package and solidifies a version when a threshold is met, so that the yield of mass production and the cross-site consistency are improved, and the quality traceability and the ability to provide evidence for disputes are strengthened.

An optical system and a display device. The optical system comprises a light waveguide and a Fresnel lens. The light waveguide comprises a waveguide substrate, a coupling-in structure and a coupling-out structure, which are arranged on the waveguide substrate; the light waveguide is configured such that at least part of the light rays coupled into the light waveguide through the coupling-in structure propagate in the light waveguide by total reflection and then exit through the coupling-out structure; the Fresnel lens is located on the light exit side of the light waveguide; the coupling-out structure comprises a grating, and the Fresnel lens comprises Fresnel teeth configured to adjust the exit angle of at least part of the light rays passing through the Fresnel lens; in the direction perpendicular to the waveguide substrate, the coupling-out structure and the Fresnel teeth overlap. In this way, the refractive correction can be performed by using the Fresnel lens, so that the optical system and the display device are more lightweight and thin, and at the same time, users with refractive errors can see the display clearly.

Particular embodiments disclosed herein provide an apparatus for performing optometric measurements includes an optical coherence tomography (OCT) imaging system configured to output scanned parallel laser beams across a patient's eye. A line in the OCT image is identified, the line representing a retina of the patient's eye. A shape of the line is then used by the refractive error calculator to measure refractive error of the patient's eye. The height of the line due to curvature indicates degree of myopia or hyperopia. More complex curvature of the line corresponds to higher order aberrations. OCT images for a plurality of section planes may be used to calculate a wavefront elevation map.

This invention belongs to the field of ophthalmic medical technology and discloses a method, device, equipment, and storage medium for predicting the development of refractive status. The method for predicting refractive status development includes: acquiring basic biological parameters and multi-dimensional optical parameters of a target individual, wherein the multi-dimensional optical parameters include at least one of refractive parameters, higher-order aberrations, and visual quality parameters; inputting the basic biological parameters and multi-dimensional optical parameters as input data to a prediction model to obtain a predicted value of the target individual's refractive status change, wherein the predicted value of the refractive status change includes at least one of the axial length change and periodic refractive error change within a preset time period. This can help improve the early identification ability of the risk of refractive errors in a target individual and recommend the best prevention and control measures for refractive errors in that individual.

This invention relates to the field of medical artificial intelligence software, and discloses an AI-assisted diagnosis and treatment system for refractive errors based on an internet hospital. The system comprises five modules: a patient information management module, an intelligent diagnostic assistance module, a remote monitoring module, a disease progression risk warning and prognosis prediction module, and an online consultation and eye health education module. The image segmentation model uses wavelet transform operators to decompose and extract multi-scale frequency domain features from the original 3D-OCT volumetric data of the eye. These multi-scale frequency domain features are then merged and concatenated with the original 3D-OCT volumetric data of the eye in the channel dimension to generate a multi-channel feature cube. This multi-channel feature cube is input into the Unet algorithm network unit, and after encoder, decoder, and hierarchical skip connection operations, a multi-channel probability map is generated. Finally, the multi-channel probability map is converted into a binary lesion segmentation mask for output. The intelligent image analysis module of this invention can improve the accuracy and efficiency of image screening for early identification of pathological myopia.

The invention relates to a method for providing control data for an ophthalmic laser of a treatment device. The method comprises, as steps: determining a wavefront map from a wavefront measurement acquired in a defined measurement area of ​​an eye; calculating an approximate wavefront map profile for an area outside the measurement area using an approximation method; determining correction data for correcting a refractive error based on the wavefront map and the approximate profile; and providing the control data for the ophthalmic laser, which includes the correction data.

The application discloses an image processing and analysis method for industrial nondestructive testing, and relates to the technical field of industrial testing and image processing, and comprises the following steps: collecting imaging pictures of a testing target and temperature change data of a corresponding testing environment, synchronously arranging the collected imaging pictures and temperature change data according to time sequence, and generating a time-continuous thermal refraction rhythm chart. Through time correlation of the thermal refraction rhythm chart and the refraction offset chart, time synchronization and space stability of the imaging pictures are realized, and pixel drift and virtual shift caused by thermal disturbance are avoided. Through a dynamic deviation correction inlet and an alternating sampling strategy, light refraction errors are compensated in real time, so that the image structure is accurate, the testing result is reliable, and the imaging accuracy and analysis stability of the industrial nondestructive testing are improved.

To provide a device for treating refractive errors of the eye. [Solution] An apparatus for treating refractive errors of the eye comprises an optical system having an optical zone and a peripheral defocusing optical structure for forming images of multiple stimuli in front of or behind the peripheral portion of the retina of the eye. In some embodiments, the peripheral defocusing optical structure is located outside the optical zone. In some embodiments, the peripheral defocusing optical structure has refractive power to focus light to a depth different from the optical zone of the eye. In some embodiments, the optical system comprises one or more of lenses, optically transparent substrates, beam splitters, prisms, or optically transparent supports.

To provide spectacle lenses that suppress the progression of refractive errors such as myopia. [Solution] An eyeglass lens comprising a functional region having a base region that causes a light beam incident from the object-side surface to be emitted from the eye-side surface, enter the wearer's pupil, and converge on the retina, and a retinal non-converging region that causes a light beam incident from the object-side surface to be emitted from the eye-side surface, but does not converge the light beam that enters the wearer's pupil on the retina, wherein at least a part of the retinal non-converging region is a buffer region capable of canceling out local negative astigmatism caused by spherical aberration of the eye at a part of the distribution of said astigmatism, and the surface shape of each buffer region is a toric surface with an axial direction in the circumferential direction and is elongated in the circumferential direction when viewed from above.