39 results about "Eye refraction" patented technology

Eye refraction is measured to achieve desired quality via a selected vision characteristics. A characteristic of vision is selected to correlate to the desired quality of vision from a group of vision characteristics comprising acuity, Strehl ratio, contrast sensitivity, night vision, day vision, and depth of focus, dynamic refraction over a period of time during focus accommodation, and dynamic refraction over a period of time during pupil constriction and dilation. Wavefront aberration measurements are used to objectively measure the state of the eye refraction that defines the desired vision characteristic. The measured state of refraction is expressed with a mathematical function enabling correction of the pre-selected vision characteristic to achieve the desired quality of vision. The mathematical expression function may be a Zernike polynomial having both second order and higher order terms or a function determined by spline mathematical calculations. Pre-selected vision characteristics may be determined using ray tracing technology.

Optical devices, systems, and methods can produce and / or measure cylindrical (as well as spherical) lens shapes throughout a range of both powers and cylindrical axes. Fluid focus lenses employ electrical potentials to vary the shape of a fluid / fluid interface between two immiscible fluids having differing indices of refractions by controlling localized angles between the interface and a surrounding container wall. Spherical power, cylindrical power, and cylindrical access alignment may be varied with no moving parts (other than the fluids).

Mobile computer devices and systems for refraction determination of an eye, for example for objective refraction determination and / or subjective refraction determination, are provided. Here, a display of the mobile computer device can be driven to display an image for refraction determination.

Device and method for determining an objective eye refraction parameter of a subject depending on a plurality of gaze directions, the device includes elements for ophthalmologically measuring an objective eye refraction parameter of a subject, and elements of visual stimulation of variable proximity and intended to stimulate the visual accommodation of the subject for first and second proximity values. The device includes opto-mechanical alignment elements for carrying out a first optical alignment of the optical axis of measurement on an eye axis in a first measuring position corresponding to a first angle of lowered viewing associated with a first proximity value to take a first measurement of an objective eye refraction parameter of the subject, and a second alignment of the optical axis of measurement on the eye axis in another measuring position corresponding to another angle of lowered viewing associated with another proximity value to take a second measurement.

The invention belongs to the technical field of virtual reality equipment, and specifically relates to a method for precisely adjusting the diopter of virtual reality glasses. According to the principle that the pixels of different colors of the display elements of the virtual reality device are imaged at different positions before and after the retina of the human eye in the same optical system, the position of the virtual image can be precisely adjusted according to the difference in the definition of the visual target image on the display screen. The positional relationship with the far point visible to the human eye; and accurately provide a feedback mechanism through the difference in the sharpness changes of pixels of different colors by the human eye, so that the human eye is in a state of less adjustment, reducing the refractive load of the human eye, Reduce the burden on the ciliary muscle. Moreover, the method enables the human eyes to relax the eyes while using the virtual reality glasses equipment, so as to protect the eyes.

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 tothe 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.

The invention relates to the field of intraocular lens manufacturing and is particularly suitable for a personalized manufacturing method of an intraocular lens. The manufacturing method comprises the following analysis steps: determining an intraocular lens degree according to acquired eye examination data; designing an intraocular lens three-dimensional shape according to the intraocular lens degree and the eye examination data; carrying out data slicing on the intraocular lens three-dimensional shape; printing data slices by utilizing photocuring 3D printing to obtain an initial product of the intraocular lens; and carrying out aftertreatment on the initial product of the intraocular lens to obtain a finished intraocular lens product. According to the manufacturing method, the intraocular lens degree is determined according to the eye examination data, the intraocular lens three-dimensional shape is correspondingly designed, and then, the intraocular lens is obtained through printing by a photocuring 3D printing technology. Since being acquired by the eye examination data, the intraocular lens has the pertinence, is closer to an own eye refraction state and anterior segment image information, is obvious in personalized use effect and can improve the visual quality and the intraocular lens implanting stability of a patient subjected to an intraocular lens implantation to the maximum.

The invention discloses a refractive compensation calculation method for initial eye refractive distribution, comprising: obtaining the initial eye refractive distribution of a user's eye; The numerical value of the refractive power of the regulating surface forms the refractive power distribution of the regulating surface; and the refractive compensation medium processing data of the refractive power distribution of the regulating surface is generated. The invention also discloses a device and a storage medium. Based on the individualized initial eye refraction distribution measurement of the human eye, the invention performs individualized refraction compensation design. The light is corrected to the refraction distribution after arbitrary adjustment.

The invention discloses a refraction adjustment method of an augmented reality device and its device, and the augmented reality device. The refraction adjustment method includes: receiving light reflected from both eyes of a user wearing the augmented reality device; The interpupillary distance of the two eyes; generating a diopter correction signal according to the interpupillary distance of the two eyes and the expected diopter, so that the diopter adjustment element can correct the diopter of the two eyes. The adjustment method can improve the comfort of using the augmented reality device.