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31 results about "Eye refraction" patented technology
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Total reflection based compact near-eye display device with large field of view
Disclosed is a total reflection based compact near-eye display device with a large field of view. Light rays emitted by an image source (103) are transmitted by using a total reflection prism (101), and are finally subjected to image magnification by means of a near-eye refractive component (105), such that a near-eye display effect with a large field of view is achieved under the conditions of a compact volume.
Owner:BEIJING ANTVR TECH
Light feeding instrument
The utility model discloses a light feeding instrument to solve the problem that retina light damage is possibly caused after long-term use in the prior art, and meanwhile, the treatment effect is also improved. Compared with the prior art in which only parameters such as red light source power and emergent light beam size are concerned, the utility model focuses on the important index of irradiance (power density), emergent light is a collimated Gaussian beam and the optical characteristics of eyes (a human eye refraction system is equivalent to a convex lens with a focal length of 17.2 mm). An optical component diffuser is additionally arranged at the position close to the cornea of a user, so that a collimated Gaussian beam is converted into diffused light to enter the eyes of the user, and diffused light spots are formed on the retina, the treatment area is sufficient, energy distribution is uniform, it is ensured that the irradiance is at the expected safety magnitude, and meanwhile the actual treatment effect is ensured.
Owner:ZHONGKANG HAIXIANG (XIAN) HOSPITAL MANAGEMENT CO LTD
Total reflection based compact near-eye display device with large field of view
Disclosed is a total reflection based compact near-eye display device with a large field of view. Light rays emitted by an image source (103) are transmitted by using a total reflection prism (101), and are finally subjected to image magnification by means of a near-eye refractive component (105), such that a near-eye display effect with a large field of view is achieved under the conditions of a compact volume.
Owner:BEIJING ANTVR TECH
Visual development monitoring management system for children and teenagers
InactiveCN120690468AMedical communicationPhysical therapies and activitiesData acquisitionTrend prediction
The invention belongs to the technical field of child visual management, and particularly relates to a child and teenager visual development monitoring management system, which comprises a data acquisition module configured to acquire child visual parameters through intelligent terminal equipment, including diopter, naked eye vision, ocular axis length and corneal curvature; the data processing module is connected with the data acquisition module and is used for executing multi-modal data fusion processing and generating a comprehensive evaluation report containing a vision trend predicted value; the user terminal module is configured to provide hierarchical visual interfaces for parents and educational institutions and display vision evolution curves and intervention suggestions; a cloud database; and an early warning decision module. The monitoring management system can check vision changes and give an analysis chart according to changes of ages, heights and the like of children, parents can be reminded to carry the children to a hospital for special eye refraction examination by opening the system, and doctors can give a correction scheme in time.
Owner:THE SECOND HOSPITAL OF SHANDONG UNIV
Subjective optometer
Owner:NIDEK CO LTD
Anterior-posterior segment synchronous imaging SS-OCT system integrated with optometry function
The invention discloses an anterior-posterior segment synchronous imaging SS-OCT system integrated with an optometry function, which comprises an OCT module, an optical coherence tomography module and an optical coherence tomography module, an OCT scanning light beam with the central wavelength of 1060 nanometers is spatially divided into an anterior segment imaging light path for imaging cornea and a whole crystalline lens and a posterior segment imaging light path for imaging retina through a 45-degree light splitting reflecting mirror, and full-eye synchronous imaging of the anterior segment and the posterior segment is achieved at the same time in a scanning period. The optometry module comprises a collimation light source, an annular diaphragm, a semi-reflecting and semi-transmitting mirror, a focusing lens group arranged on one side of a reflecting surface of the semi-reflecting and semi-transmitting mirror, a second dichroscope and a CCD (Charge Coupled Device) arranged behind the focusing lens group which are sequentially arranged along a light path, and is used for dynamically measuring the refraction state of human eyes and feeding back diopter in real time by adopting an optometry method based on a collimation aperture; and the automatic alignment module is used for automatically adjusting the positions of the OCT module and the optometry module according to a positioning result by using a triangulation positioning camera technology so as to ensure that the to-be-detected human eyes are always in the optimal imaging position.
Owner:ZHONGBEI UNIV
Optical system for fundus imaging
The application provides an optical system for fundus imaging of an eye to be tested, comprising: a fundus illumination light path for providing a light source to illuminate the fundus of the eye to be tested; a fundus imaging light path comprising an accommodating lens for fundus imaging of the eye to be tested; a fixation light path for providing a fixation target to enable the eye to be tested to fixate; and an auxiliary accommodating light path, the auxiliary accommodating light path sharing the accommodating lens with the fundus imaging light path to improve the accuracy and reliability of the accommodation. By sharing the accommodating lens between the auxiliary accommodating light path and the fundus imaging light path, the complicated linkage adjusting mechanism is avoided, the accuracy and reliability of the accommodation alignment are improved, the device cost is saved, and the purposes of economy, high efficiency, accuracy and convenience are achieved. Further, the fundus imaging of the eye to be tested is realized by combining the iris split imaging and the fundus illumination technology, and whether the accommodation imaging light path of the fundus imaging optical system is adjusted to the clearest according to the refractive power of different eyes to be tested is objectively evaluated, so that the clearest fundus color photograph is obtained.
Owner:SHENZHEN CERTAINN TECH CO LTD
Intraocular lens with lens and surface design method thereof
The invention relates to the technical field of ocular refraction, in particular to an intraocular lens with a lens and a surface design method of the intraocular lens. The intraocular lens with the lens comprises an optical part and a supporting part, the rear surface of the intraocular lens is arranged to be an aspheric surface, and the curvature of the rear surface is continuously and gradually reduced from the center of the intraocular lens to the periphery of the intraocular lens. The geometric structure can be highly adapted to an aspheric surface form which is also presented by the front surface of a natural crystalline lens of a human eye and of which the curvature is gradually reduced from the center to the periphery. Due to the high consistency of the form, after the artificial lens is implanted, a more uniform, stable and safe gap can be formed between the rear surface of the artificial lens and the front surface of a natural lens, and unnecessary physical contact or friction between the artificial lens and the natural lens is effectively avoided; therefore, the long-term wearing comfort of a patient and the stability of postoperative visual quality are greatly improved, and the problems of potential safety hazards and poor comfort in the prior art are really solved.
Owner:EYEBRIGHT MEDICAL TECH BEIJING
Method for detecting the effect of longitudinal chromatic defocus signals on the development of the refraction of the eye
The application provides a detection method for the effect of longitudinal chromatic aberration defocus signals on eye refraction development, which comprises the following steps: obtaining a spectral sensitivity function of human eye cone cells; obtaining a first target defocus signal based on the spectral sensitivity function; performing an influence experiment of a display image longitudinal chromatic aberration defocus signal on human eyes based on the spectral sensitivity function, and obtaining a second target defocus signal; performing an animal level in-vivo detection experiment based on the spectral sensitivity function, and obtaining a third target defocus signal; and performing a molecular level analysis experiment of the effect of the image longitudinal chromatic aberration defocus signal on eye refraction development based on the in-vivo detection experiment. The method provided in the embodiments of the application can analyze the effect of DI-LCA defocus signals on refraction development through cone cells from three levels of tissues, animals and molecules, and preferably target defocus signals, thereby providing support for the research and development of display driving programs and devices for reducing the risk of myopia.
Owner:BEIJING TONGREN HOSPITAL AFFILIATED TO CAPITAL MEDICAL UNIV +1
Total reflection based compact near-eye display device with large field of view
Disclosed is a total reflection based compact near-eye display device with a large field of view. Light rays emitted by an image source (103) are transmitted by using a total reflection prism (101), and are finally subjected to image magnification by means of a near-eye dioptric component (105), such that a near-eye display effect with a large field of view is achieved under the conditions of a compact volume. A gap layer exists between the near-eye dioptric component and the total reflection prism, and the gap layer contains substances with a refractive index lower than that of the total reflection prism.
Owner:BEIJING ANTVR TECH
Grid-type defocused spectacle lens and therapeutic device for inhibiting eye axis growth
The present invention provides a grid eyeglass lens and therapeutic device for inhibiting the growth of the eye axis, belonging to the technical field of optical lenses for eye care and treatment. Several viewing zones are distributed in the eyeglass lens, and the viewing zones all contain lenses for correcting the diopter of the eye, including hyperopia or myopia correction lenses, plano lenses or holes, and first astigmatism correction lenses; one of them is the main viewing zone So, and the remaining viewing zones are secondary viewing zones Si; the part outside the viewing zone is the defocusing zone Sx, and the defocusing zone Sx is in a connected grid format; the defocusing zone Sx contains a positive lens and a second astigmatism correction lens that is the same or substantially the same as the above, and the diopter B2 of the positive lens is greater than 0DS; or the defocusing zone Sx contains a defocusing lens. The present invention controls the lateral extension of the eyeball and inhibits the increase of the eye axis. While inhibiting the growth of the eye axis, it can provide a larger full-clear vision range, is comfortable to use, has no interference, and is not prone to visual fatigue.
Owner:戴明华
Ophthalmologic measurement apparatus, ophthalmologic measurement system, and ophthalmologic measurement program
There is provided an ophthalmologic measurement apparatus for measuring a subject eye. The apparatus includes measurement means for objectively measuring eye refractive power of the subject eye, acquisition means for acquiring intraocular lens information relating to an intraocular lens inserted into the subject eye, and correction means for correcting a measurement result of the eye refractive power, based on the intraocular lens information.
Owner:NIDEK CO LTD
Determination of incorrect eye refraction
The present invention relates to a method (210), an apparatus (110) and a computer program for determining the refractive error of at least one eye (112) of a user (114), and to a method for manufacturing spectacle lenses for at least one eye (112) of a user (114). The method (210) for determining the refractive error of at least one eye (112) of a user (114) comprises the steps of: a) presenting at least one symbol (122) on a visual display unit (120), wherein at least one parameter of the at least one symbol (122) presented on the visual display unit (120) is variable; b) acquiring an eye movement metric (144) of at least one eye (112) of the user (114) based on the at least one symbol (122) presented on the visual display unit (120); c) establishing a time point at which a recognition threshold of the user (114) for the at least one symbol (122) presented on the visual display unit (120) is evident from the eye movement metric (144) of at least one eye (112) of the user (114); and d) determining the value (220) of the refractive error of at least one eye (112) of the user (114) according to the at least one parameter established at this time point. The present invention allows the value (220) of the refractive error of at least one eye (112) of a user (114) to be objectively determined without using dedicated equipment and without feedback from the user (114), which is position-independent and suitable for use by an ordinary person.
Owner:CARL ZEISS VISION INTERNATIONAL GMBH
Measuring eye refraction
Methods, systems, and devices are provided for measuring eye refraction without a lens, and more particularly, for measuring eye refraction with a mobile device application. An exemplary method includes measuring a distance between a patient and a mobile device, presenting to the patient one or more visual targets sized and shaped to represent perfect vision such as by using Vernier targets or grating targets, instructing the patient to indicate whether the patient can accurately read the visual targets and, if not, to move closer to the mobile device until the patient can accurately read the visual targets, calculating a vision prescription for the patient based on the visual targets and a final distance between the patient and the mobile device, and displaying the vision prescription for the patient.
Owner:SCHEPENS EYE RESEARCH INSTITUTE INC
System and method for determining refraction features of both first and second eyes of a subject
A system for determining refraction features of both first and second eyes of a subject including a light field display device, a system of localization of the positions of the first and second eyes of the subject, the light field display device generating a first light field directed selectively toward the first eye, and, respectively, a second light field directed selectively toward the second eye, control circuitry that adjusts the first light field as a function of at least a first refraction parameter associated with at least a first optical aberration for the first eye and the control circuitry adjusting said second light field as a function of at least a second refraction parameter associated with at least a second optical aberration for the second eye.
Owner:ESSILOR INTERNATIONAL(COMPAGNIE GENERALE D OPTIQUE)
A dynamic data processing method, device and program product based on eye refraction state
The application relates to the field of intelligent medical treatment, in particular to a dynamic data processing method, device and program product based on an eye refraction state. The method comprises the following steps: acquiring initial refraction data and environment data of an eye of a person to be measured; preprocessing the initial refraction data and the environment data to obtain preprocessing data; calculating the eye refraction data by using a refraction state influence function; and wherein the refraction state influence function is obtained by calculating the dynamic change relationship between the initial eye refraction data and the environment data. The application can solve the personalized expression of the difference in light perception of different myopia degrees, dynamically predict the brightness and color temperature parameters, drive the actual lighting equipment, realize the dynamic balance of visual comfort and environmental adaptability, and has good practical application value.
Owner:CENT OF OPTOMETRY INT INNOVATION OF WENZHOU +1
Measuring eye refraction
Methods, systems, and devices are provided for measuring eye refraction without a lens, and more particularly, for measuring eye refraction with a mobile device application. An exemplary method includes measuring a distance between a patient and a mobile device, presenting to the patient one or more visual targets sized and shaped to represent perfect vision such as by using Vernier targets or grating targets, instructing the patient to indicate whether the patient can accurately read the visual targets and, if not, to move closer to the mobile device until the patient can accurately read the visual targets, calculating a vision prescription for the patient based on the visual targets and a final distance between the patient and the mobile device, and displaying the vision prescription for the patient.
Owner:SCHEPENS EYE RESEARCH INSTITUTE INC
Device for restraining too fast development of eye diopter
Owner:JIANSHI VISION TECH (CHANGZHOU) CO LTD
Apparatus and method for self-administration of optical scanning of a person's eye optical system
A system for obtaining optical coherence tomography of the optical system of a person, comprising: an eyepiece customized for alignment and positioning to contact a person's eye socket and having a lens pocket for receiving a refractive lens customized for the person's eye refraction characteristics; a condensing system for receiving light from the eyepiece; a scanning module optically connected to the condensing system and having a mirror tiltable in two directions for obtaining optical scanning data from the person's optical system; and a spectrometer and camera module optically connected to the scanning module for obtaining and storing the optical scanning data, wherein the eyepiece, condensing system and scanning module are arranged to provide an optical path for delivering a light beam to the person's eye, and receive reflected light to be directed to the scanning module.
Owner:OCTHEALTH LLC
Optometry unit (AOS-2300)
1. Name of the product in this design: Optometry Unit (AOS-2300). 2. Purpose of this design: This design is used for auxiliary eye refraction. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model. 5. The bottom surface of this product is a part that is not easily seen or cannot be seen during use, so the bottom view is omitted.
Owner:QINGYUAN SHITONG OPTICAL EQUIP CO LTD
Ophthalmic device control program
To provide an ophthalmic device control program that can appropriately release the accommodation of the eye being examined. [Solution] An ophthalmic device control program executed in a control unit 40 that controls an ophthalmic device 1 comprising an eye refractive power measurement system 43 for objectively measuring the ocular characteristics of the eye E under examination, and a target projection system 42 for presenting a fixation target to the eye E under examination at a predetermined presentation position and creating a cloud over the eye E, wherein the control unit 40 is instructed to perform the following steps: an objective measurement step of changing the presentation position of the fixation target in a direction that increases the amount of cloud, causing the target projection system 42 to present the fixation target, and objectively measuring the ocular characteristics in a time series using the eye refractive power measurement system 43; and an estimation step of estimating the tension tendency of the eye under examination, which indicates the property of each eye under examination to cloud, based on the objective measurement results of the ocular characteristics measured in a time series.
Owner:TOPCON CORPORATION
Focusing-free ellipsoidal fundus imaging system
The invention discloses a focusing-free ellipsoidal fundus imaging system, and belongs to the technical field of fundus imaging. The system comprises a light source module, a light splitting module, a light condensing module, a scanning module, a light detection module, a focusing-free transmitting mirror group and an ellipsoidal reflector, light rays sequentially pass through the light splitting module, the light condensing module, the scanning module, the focusing-free transmitting mirror group and the ellipsoidal reflector and reach human eyes through pupils; reflected light of human eyes sequentially passes through the ellipsoidal reflector, the focusing-free transmitting mirror group, the scanning module, the light condensing module and the light splitting module to the light detection module, and the light detection module converts a light signal into a digital image. A human eye pupil is located at a first focus of the ellipsoidal reflector, and an entrance pupil of the focusing-free transmitting mirror group is located at a second focus; the ellipsoidal reflector transmits incident light to human eyes and transmits reflected light back to the focusing-free transmitting mirror group; and the focusing-free lens group is used for correcting field aberration and compensating human eye diopter aberration. The system has the advantages of ultra-wide angle, high resolution, no mydriasis and simple operation.
Owner:HUAZHONG UNIV OF SCI & TECH
Eye refractive power measurement apparatus and eye refractive power measurement method
To provide an eye refractive power examination device capable of shortening the time required for measurement.SOLUTION: An eye-refractive-power examining device of the present disclosure includes a first optical system that is capable of generating a plurality of types of light having different characteristics and causes light to enter a subject eye that is one of both eyes of a subject, a sensor that detects retroillumination from the subject eye, and a determiner that determines a refractive power of the subject eye, in which the sensor detects an image formed by the retroillumination, and the determiner determines the refractive power of the subject eye based on a form of the image.SELECTED DRAWING: Figure 1
Owner:WASEDA UNIV
Ophthalmologic apparatus
To provide an ophthalmologic apparatus capable of shortening the measurement time required for rough measurement of eye refractive power.SOLUTION: An ophthalmologic apparatus includes: a rough measurement control unit 46 that performs rough measurement that images reflected light (fundus reflected light PB) using an imaging element 12g by projecting a measurement pattern PA onto the fundus Ef from a measurement pattern projection optical system 16; a provisional eye refractive power calculation unit 48 that calculates a provisional eye refractive power of the eye to be examined E on the basis of an image (referring image 29) of the reflected light captured by the imaging element 12g during the rough measurement; and a lens movement control unit 50 that drives a lens movement mechanism (linked movement mechanism 27) on the basis of the calculation result from the provisional eye refractive power calculation unit 48 to move a focusing lens 17d to a position where the fundus Ef and the imaging element 12g are in conjugate relation. Before starting main measurement, the rough measurement control unit 46, the provisional eye refractive power calculation unit 48, and the lens movement control unit 50 are repeatedly activated multiple times, and the light quantity of the measurement pattern PA projected onto the eye to be examined in the first rough measurement is set greater than that in the second and subsequent measurements.SELECTED DRAWING: Figure 4
Owner:TOPCON CORPORATION
Diopter measurement system, method and related device
The embodiment of the invention discloses a diopter measurement system and method and a related device. The diopter measurement system comprises a watching assembly, an illumination assembly, a scanning assembly, an imaging assembly and a measurement assembly, wherein the scanning assembly is used for adjusting the angles of telecentric light and scattered light entering the eyes of a user, receiving fundus reflected light of the eyes of the user, adjusting the emergent angle of the fundus reflected light and guiding the fundus reflected light to the measuring assembly; the imaging assembly is used for carrying out iris imaging on the human eyes of the user, determining the central position of the human eyes of the user and determining cornea curvature related parameters of the human eyes of the user through cornea reflected light; and the measuring assembly is used for generating infrared light, guiding the infrared light to the scanning assembly, emitting the infrared light to the human eyes of the user through the scanning assembly, receiving infrared reflected light of the human eyes of the user to the infrared light, and determining related parameters of the diopter of the human eyes of the user according to the infrared reflected light. In this way, refraction measurement at different angles is achieved, and meanwhile the function of measuring relevant parameters of the human cornea curvature is integrated.
Owner:SHENZHEN CERTAINN TECH CO LTD +1
Ophthalmologic apparatus
To provide an ophthalmologic apparatus that allows a subject to visually recognize a fixation target clearly at low cost regardless of the state of an eye to be examined.SOLUTION: An ophthalmologic apparatus 1 for measuring eye refractive power of an eye E to be examined includes: a target projection optical system 15 for projecting a light flux of a fixation target onto the eye to be examined, which at least includes a light flux emission part (a target display part 15a) for emitting the light flux of the fixation target and a lens (focusing lens 15e) through which the light flux of the fixation target passes; and a focal depth expansion part (pin hole 100a) provided in the target projection optical system 15 for expanding the focal depth of the target projection optical system. The positions of the light flux emission part and the lens in the target projection optical system are fixed.SELECTED DRAWING: Figure 2
Owner:TOPCON CORPORATION
Corrective eyewear lens, method of manufacturing same, and method and device for instructing such manufacture
Described are various embodiments of a corrective eyewear lens, method of manufacturing same, and method and device for instructing such manufacture. In one example, a corrective eyewear lens, comprises an optical medium having a common corrective optical refraction area defined therein for addressing a given user eye refraction deficiency. The common corrective optical refraction area comprises at least two distinct corrective optical refraction zones defined by distinct optical refraction parameters to invoke respective optical refraction corrections optically deviated from one another while commonly addressing a same given user eye refraction deficiency.
Owner:EVOLUTION OPTIKS LTD
Dynamic data processing method and device based on eye refraction state and program product
The invention relates to the field of intelligent medical treatment, in particular to a dynamic data processing method and device based on an eye refraction state and a program product. Comprising the following steps: acquiring eye initial refraction data and environment data of a to-be-detected person; preprocessing the eye initial refraction data and the environment data to obtain preprocessed data; calculating the preprocessed data through a refraction state influence function to obtain eye refraction data; wherein the refraction state influence function is obtained by calculating the dynamic change relation between the eye refraction initial data and the environment data. According to the method, personalized expression of different myopia degrees on illumination perception differences can be achieved, brightness and color temperature parameters are dynamically predicted, actual lighting equipment is driven, dynamic balance of visual comfort and environmental adaptability is achieved, and the method has good actual application value.
Owner:CENT OF OPTOMETRY INT INNOVATION OF WENZHOU +1
A dynamic measurement method of diopter based on eye timing image
The application provides a dynamic measurement method of diopter based on eye timing images, and relates to the technical field of eye refraction diagnosis, and comprises the following steps: collecting a timing image sequence of a measured eye containing Placido ring projection while presenting programmed switching visual accommodation stimulation to the measured eye, and recording the accommodation stimulation value corresponding to each frame of image; processing each frame of image in the timing image sequence, extracting image features related to the refraction state, and forming timing dynamic features; based on the timing correlation between the timing dynamic features and the accommodation stimulation value, distinguishing and removing the dynamic refraction change component associated with the visual accommodation stimulation in the timing dynamic features, so as to obtain a static diopter estimation value representing the inherent refraction state of the measured eye. The application can realize high-precision static diopter measurement in a non-mydriasis natural state.
Owner:HUAHUIJIAN (TIANJIN) TECH CO LTD
Method for identifying abnormal development of eye refractive power and device for restraining its overly rapid development
This invention relates to a method for identifying abnormal development of ocular refractive power and a device for restraining excessively rapid development of refractive power. It involves acquiring multiple sets of corneal and axial length parameters within a predetermined timeframe in a second stage, and then using a Sigmund function to simulate the growth and development of ocular refractive power. If the fitted parameter γ is greater than the parameter γ of a normally developing eye... std If the refractive error is normal, it can be determined that the eye's refractive development is abnormal; otherwise, it is determined that the development is normal. This invention provides a device to restrain excessively rapid refractive development, comprising a multi-level defocus compensation training lens and a visual target for adaptive training with the multi-level defocus compensation training lens. The multi-level defocus compensation training lens is used for triggered compensation training, thereby creating a stable restraint state that controls refractive development below a predetermined threshold, achieving both prevention and treatment.
Owner:JIANSHI VISION TECH (CHANGZHOU) CO LTD