24 results about "Subjective refraction" patented technology

The invention discloses an astigmatism coaxial decomposition method, system and device for analyzing the astigmatism correction effect of a corneal refractive surgery, and relates to the technical field of corneal refractive surgeries, and the method comprises the steps: obtaining a preoperative subjective optometry result and a postoperative subjective optometry result of a to-be-evaluated user; based on the preoperative subjective optometry result and the postoperative subjective optometry result, the actual correction refractive power decomposed in the axial direction of the expected correction lenticular lens is determined; based on the preoperative subjective optometry result and the postoperative subjective optometry result, the maximum actual correction refractive power decomposed in the direction perpendicular to the axial direction of the expected correction lenticular lens is determined; the surgical actual corrective diopter of the user is determined based on the actual corrective power decomposed in the axial direction of the lenticular and the maximum actual corrective power decomposed perpendicular to the axial direction of the lenticular. According to the astigmatism description method provided by the invention, the efficiency, practicability and comprehensiveness of astigmatism correction effect analysis are improved.

An ophthalmologic apparatus includes a subjective measurement optical system configured to measure a subjective refractive value of a subject eye; an objective measurement optical system configured to measure objective refractive characteristics of the subject eye; and a controller configured to control the subjective measurement optical system and the objective measurement optical system. The controller is further configured to perform measurement of the objective refractive characteristics of the subject eye by the objective measurement optical system and perform objective monitoring to monitor objective measurement information obtained by the measurement of the objective refractive characteristics during a weakest power test in which a weakest point is being obtained by the subjective measurement optical system, a maximum visual acuity value or a set predetermined visual acuity value being readable from the weakest point.

Methods and systems herein can include displaying at least one image to a test subject, wherein the at least one image has a visual appearance to the test subject based on physical characteristics of the eyes of the test subject, obtaining input from the test subject regarding the visual appearance of the at least one image, and calculating an optical parameter of the test subject based on the input from the test subject.

This invention belongs to the field of subjective optometry prescription parameter measurement and prescription technology. It provides a prescription generation method based on optometrist prescription big data and visual AI big model, including: acquiring retinal reflection image sequences under various physiological optical conditions and incident light source physical conditions; using visual AI big model to perform feature encoding and inference on the image sequences to generate patient subjective optometry prescriptions; this invention realizes the mapping from image sequence representation to optometrist subjective optometry prescriptions that can be used for direct prescription by acquiring retinal reflection image sequences under multiple physiological and physical conditions and combining the feature extraction and analysis capabilities of the pre-built AI big model; through feature encoder and subjective refractive power generator, the physical consistency, robustness and individual adaptability of subjective optometry prescription parameter prediction are enhanced, realizing automated and high-precision subjective optometry prescription generation.

An apparatus, and corresponding method, for determining a property of an eye includes a housing with a proximal port that receives an eye and also light from the eye. The housing further includes a distal port, and the two ports together form a visual channel providing an open view to enable the eye to see target indicia external to and spaced away from the housing. A wavefront sensor within the housing is configured to receive the light from the eye via the optical path and to measure a wavefront of the light. A determination module determines an objective refractive correction based on the wavefront and predicts a subjective refractive preference of a person having the eye based on the objective refractive correction. Embodiments can be handheld, and binocular, and predict subjective refraction based on demographic and other information.

Methods and systems herein include displaying at least one image to a test subject, wherein the at least one image has a visual appearance to the test subject based on physical characteristics of the

A concise representation illustrating essential elements of a subjective refraction eye test that includes choices of optics offered to a test subject, responses by the test subject indicating respective choices among the optics, and time durations of, between, or both of and between, responses by the test subject indicating the respective choices of optics. The concise representation includes a presentation that illustrates the essential elements of the eye test.

The invention provides comprehensive refraction detection equipment and method. The equipment comprises a support (1), an operation table (10) fixedly mounted on the support (1), a mounting seat (11) fixed on the top surface of the operation table (10), an inspection tester (15) arranged on the mounting seat (11) and a local computer (12) arranged on the bottom surface of the operation table (10), a central control unit and a storage part are arranged in the local computer (12); a head fixing part (2) and an eye fitting part (3) are arranged on the front side of the inspection tester (15), and an artificial intelligence (AI) dialogue module, a voice input acquisition module, a subjective optometry module, an objective optometry module, a fundus image camera, an eye movement tracking part, an eye axis meter control device and an eye axis meter are integrated in the inspection tester (15). By integrating the functional modules and coordinating the work of the modules through the central control unit, the inspection efficiency and the diagnosis reliability can be effectively improved.

Methods and systems herein include displaying at least one image to a test subject, wherein the at least one image has a visual appearance to the test subject based on physical characteristics of the

A system for administering a subjective refraction comprising a phoropter, a display, and a computing device configured to generate a first set of conditions for a first test; receive a first input indicative of the patient's vision under the first set of conditions; automatically display, based on the first input, an updated first visual reference; iteratively update, based on the first input, a second combination of the plurality of lenses and receive feedback from the patient until a predefined number of responses are received to determine an endpoint for the first test; automatically generate and display a second set of conditions for a second test and a second plurality of response fields; receive an updated input indicative of the patient's vision under the second set of conditions; and determine an endpoint for the second test based on a determined a visual acuity matching a predefined visual acuity value.

Methods and systems herein can include displaying at least one image to a test subject, wherein the at least one image has a visual appearance to the test subject based on physical characteristics of the eyes of the test subject, obtaining input from the test subject regarding the visual appearance of the at least one image, and calculating an optical parameter of the test subject based on the input from the test subject.

Methods and systems herein include displaying at least one image to a test subject, wherein the at least one image has a visual appearance to the test subject based on physical characteristics of the

The invention relates to an attachment device (2) for testing an eye (E1, E2) of a subject under near or mid-vision conditions, designed to be used with an optometry device (1) for measuring a subjective refractive value of the eye (E1, E2), the optometry device (1) comprising:-a refractive test unit (10) having optical components (11A, 12A), the invention relates to a dioptric test system (1) comprising:-a dioptric test unit (10) comprising optical means for providing different refractive powers to a subject's eye (E1, E2) during a subjective dioptric test, and-a display unit (20) adapted to generate a visual target (T1, T2) for the subject's eye (E1, E2), an image of said visual target (T1, T2) being visible by said dioptric test unit (10) along a reference viewing direction (OBS1), the accessory device (2) comprises an optical portion (40) configured to be mounted on a refractive test unit (10) of an optometry device (1), the optical portion comprising an optical system (41, 42) configured to deflect an image of a visual target (T1, T2) from said reference viewing direction (OBS1) towards an oblique viewing direction (OBS2, OBS3), the visual target (T1, T2) being positioned in the oblique viewing direction (OBS2, OBS3), and the visual target (T1, T2) being positioned in the oblique viewing direction (OBS2, OBS3). The invention relates to an optometry device (1) comprising a reference observation direction (OBS1) along which an image of a refractive test unit (10, T2) is visible through the refractive test unit (10) and an optical portion (40) of an attachment device (2), said inclined observation direction (OBS2, OBS3) defining a non-zero angle (A1, A2) with said reference observation direction (OBS1) when the optical portion (40) is mounted on said refractive test unit (10) of the optometry device (1). A2) and corresponds to a downward gaze direction of the subject and / or a convergent gaze direction of the subject.

Methods and systems herein include displaying at least one image to a test subject, wherein the at least one image has a visual appearance to the test subject based on physical characteristics of the

The invention relates to an optical arrangement (1) and a method for the operation thereof for determining the objective and subjective refraction of the eyes of a person and the centration of a pair of spectacles in front of the eyes (11, 12) of the person (2). The optical arrangement (1) comprises the following apparatuses: a shielding apparatus (3) with an arched surface (4); a number of cameras (5) for capturing images of the head of the person (2) from different directions; a projection and measuring apparatus (6) which comprises an eye box (9), wherein the eye box (9) is arranged at a defined position in relation to the shielding apparatus (3); and a human machine interface (40) that is designed for communication with the person (2). The projection and measuring apparatus (6) comprises, for each eye (11, 12), a separate device (10) for projecting digital image content in the visual field of the person (2) and for projecting and reflecting measurement beams for determining the objective refraction for the person (2); an eye tracking device (5, 19) for automatic alignment and adjustment of the devices (10) for projecting digital image content in the visual field of the person (2) in relation to the position of the eyes (11, 12) to be measured; an apparatus (21, 22) for measuring the objective refraction of the eyes (11, 12); and a projector (20) for projecting at least one image for each eye which is visually perceivable as digital image content (25) from the eye box (9).

The invention relates to a method for providing control data for an ophthalmic laser (12) of a treatment device (10) for correcting a refractive error of an eye.The procedure comprises providing subjective refractive error data and measurement data of the eye, wherein the predetermined measurement data include an ocular wavefront, a corneal wavefront, and an ocular topography; determining whether an aberration condition is present in the measurement data, whereby aberration values ​​of the ocular and corneal wavefronts are compared with an aberration threshold to test for the aberration condition; whereby correction data for correcting the refractive error are determined based on the topography if the aberration values ​​are less than or equal to the aberration threshold; and determining whether a visual acuity criterion is present in the subjective refractive error data if the aberration values ​​are greater than the aberration threshold, whereby the correction data are determined based on the topography if the visual acuity criterion is present.Finally, the procedure includes providing the tax data, which includes the determined correction data.

An optical optometry system belongs to the field of optometry and comprises a spherical lens A, a spherical lens B, a cylindrical lens A and a cylindrical lens B which are sequentially arranged along an optical axis from an object side to an image side, the spherical lens A is movably arranged along the optical axis, the cylindrical lens A and the cylindrical lens B are rotatably arranged by taking the optical axis as an axis, an intersection point of an axial position of the cylindrical lens A and an axial position of the cylindrical lens B is positioned on the optical axis, and the cylindrical lens A and the cylindrical lens B are positioned on the optical axis. The axial position of the cylindrical lens A and the axial position of the cylindrical lens B are both perpendicular to the optical axis, the image-side focal power of the spherical lens A is phi 1, the image-side focal power of the spherical lens B is phi 2, the image-side focal power of the cylindrical lens A is phi 3, the image-side focal power of the cylindrical lens B is phi 4, and phi 1, phi 2, phi 3 and phi 4 meet the following relations that phi 1 is larger than 0 and equal to phi 2 + phi 3, phi 3 is equal to phi 4, and individual independent and rapid optometry can be achieved.

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 optical arrangement (1) for determining the objective and subjective refraction of a person's eyes and the centring of glasses in front of the eyes (11, 12) of the person (2) is described, comprising the following devices: a shielding device (3) with a curved surface (4); a number of cameras (5) for capturing images of the person's head (2) from different directions; a projection and measuring device (6) comprising an eyebox (9), the eyebox (9) being arranged at a fixed position with respect to the shielding device (3); and a human-machine interface (40) designed to communicate with the person (2).The projection and measuring device (6) comprises, for each eye (11, 12), a separate device (10) for projecting digital image content in the field of vision of the person (2), as well as for projecting and reflecting measuring beams for objectively determining the refraction of the person (2); an eye-tracking device (5, 19) for automatically aligning and adjusting the devices (10) for projecting digital image content in the field of vision of the person (2) with respect to the position of the eyes (11, 12) to be measured; a device (21, 22) for measuring the objective refraction of the eyes (11, 12); and a projector (20) for projecting at least one image for each eye, which image is visually perceptible from the eyebox (9) as digital image content (25).

Methods and systems herein include displaying at least one image to a test subject, wherein the at least one image has a visual appearance to the test subject based on physical characteristics of the

The present invention relates to an accessory device (2) for testing eyes (E1, E2) in near or intermediate vision conditions, designed to be used with an optometric device (1) for measuring the subjective refraction of the eyes (E1, E2), the accessory device (2) comprising a refraction testing unit (10) having optical components (11A, 12A) for providing different refractive powers to the subject's eyes (E1, E2) during a subjective refraction test, and a display unit (20) adapted to generate visual targets (T1, T2) for the subject's eyes (E1, E2), the images of which are visible through the refraction testing unit (10) along a reference observation direction (OBS1), and the accessory device (2) an optical portion (40) configured to be attached to a refraction testing unit (10) of an optometric device (1), the optical portion (40) comprising optical systems (41, 42) configured to shift an image of a visual target (T1, T2) from a reference observation direction (OBS1) toward oblique observation directions (OBS2, OBS3) along which the image of the visual target (T1, T2) is visible through the refraction testing unit (10) and the optical portion (40) of the accessory device (2), the oblique observation directions (OBS2, OBS3) defining non-zero angles (A1, A2) with the reference observation direction (OBS1) when the optical portion (40) is attached to the refraction testing unit (10) of the optometric device (1), and corresponding to a downward gaze direction of a subject and / or a convergence gaze direction of a subject.

Methods and systems herein can include displaying at least one image to a test subject, wherein the at least one image has a visual appearance to the test subject based on physical characteristics of

Methods and systems herein include displaying at least one image to a test subject, wherein the at least one image has a visual appearance to the test subject based on physical characteristics of the

Provided are a recording medium and a subjective refraction system that enable more smooth execution of subjective refraction. A first information processing device acquires an instruction signal that instructs an operation of a subjective refraction device, and transmits a drive signal that causes the operation instructed by the acquired instruction signal to be performed to the subjective refraction device. In a case where the first information processing device is being remotely accessed by a second information processing device, the first information processing device can acquire an instruction signal input by a user to the second information processing device via a network. In addition, the first information processing device can acquire a response input by a subject who visually confirmed a presented visual target, and generate an instruction signal that instructs an operation of the subjective refraction device based on the acquired response.