21 results about "Eye refraction" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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

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.

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.

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.

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.

This disclosure relates to a multifunctional optical inspection instrument for eye examination. The multifunctional optical inspection instrument includes: a first optical component group comprising at least a front lens assembly and a rear lens assembly, arranged at a first predetermined position within the multifunctional optical inspection instrument to form a first optical path for imaging the fundus of the eye; a second optical component group arranged at a second predetermined position within the multifunctional optical inspection instrument to form a second optical path for refraction testing of the eye; and a first reflector disposed between the front lens assembly and the rear lens assembly and configured to be movable relative to a preset optical path conversion position, so as to convert the working optical path of the multifunctional optical inspection instrument into the corresponding first optical path or the second optical path. Using the solution of this disclosure, both eye imaging and eye refraction testing modes can be achieved with a single device, improving inspection efficiency.