25 results about "Ophthalmic optics" patented technology

The invention relates to the technical field of ophthalmology optics, in particular to a myopia control lens optical system integrating ray tracing and aberration correction, which comprises a wavefront phase acquisition module, a wavefront feature statistics module, a ray tracing simulation module, a microstructure form regulation and control module and a feedback control module. According to the method, accurate identification and datamation description of wavefront change under a dynamic vision condition can be realized by acquiring an eyeball wavefront phase matrix, performing gridding partition analysis and extracting local phase offset amplitude and time sequence characteristics, and a light propagation path model is constructed by combining statistical characteristics of an abnormal wavefront region; the self-adaptive compensation is carried out on the local focus deviation, and the spatial distribution optimization of the refractive index and the curvature is further realized based on the microstructure form regulation and control, so that the real-time matching of the optical parameters and the wavefront state is maintained during the processing and use of the lens, and therefore, the imaging quality is stabilized, the visual definition is improved, and the myopia control reliability is enhanced.

The invention relates to the technical field of ophthalmology optics, and discloses an implantable APD implant for treating presbyopia, and the method comprises the steps: carrying out the focal power mapping of a far-sight diopter component in a target optical parameter, obtaining the basic refraction surface type data, and carrying out the layout of a near-sight diopter component annular structure, and obtaining the diffraction phase structure data; carrying out integrated aberration balance on the two kinds of data to obtain a composite optical surface type data set; converting the phase variation in the composite optical surface type data set into an initial step height by combining a lens material and an environmental medium optical constant; obtaining diffraction structure morphology parameters based on material dispersion attribute optimization; constructing a digital processing map by taking the geometric position of the surface as a processing node and taking a topology and depth evolution relationship as a processing edge; performing microstructure construction on the surface of the optical polymer substrate according to the digital processing atlas to obtain an APD implant; according to the invention, the APD implantation processing efficiency and the optical adaptability efficiency can be improved.

The invention belongs to the technical field of ophthalmic optics, and relates to a design method of a personalized spectacle lens and the spectacle lens. The design method comprises the following steps: constructing a spectacle-eye joint mathematical model based on spectacle frame posture and eyeball rotation, and analyzing and calculating the mathematical model to obtain a theoretical diopter calculation formula of the lens surface under prescription diopter; based on the basic eye model, according to the prescription diopter, the posture of the spectacle frame, and the central diopters, refractive indexes and central thicknesses of the inner and outer surfaces of the lenses, constructing a lens-eye system comprising the lenses to be optimized and eye models with different rotation angles; calculating the actual diopter of the surface of the to-be-optimized lens based on the intersection point of the human eye visual axis of the eye model with different rotation angles and the surface of the to-be-optimized lens; taking the minimum absolute value of the difference between the actual diopter and the theoretical diopter of the surface of the to-be-optimized lens as a target, ensuring the imaging quality and machinability of the lens, and optimizing the parameters of the inner surface of the to-be-optimized lens to obtain the personalized spectacle lens considering the posture of the spectacle frame and the rotation of the eyeball.

The utility model discloses visual function adjustment training appearance and system relates to ophthalmic optics instrument technical field. A kind of visual function adjustment training appearance, including display panel and light stimulation part, the front of display panel includes the display for output visual stimulation information;The light stimulation part includes the light district at the outer periphery of display panel front, and light district is arranged with light emitting piece to radiate the light of preset wavelength for user visual, and the eyes of the user are illuminated. The utility model improves the adjustment and training effect of visual function by the synergistic effect of visual stimulation information and illumination.

This invention provides an ophthalmic optical device that eliminates the need to place a separate lens attachment between the objective lens and the eye under examination by changing the working distance between the objective lens and the eye under examination when observing the posterior segment and when observing the anterior segment. [Solution] In the ophthalmic optical device, when photographing the posterior segment of the eye under examination, a position conjugate to the vertical scanning unit is formed in the anterior segment of the eye under examination, and the scanning beam from the vertical scanning unit is focused on the posterior segment of the eye under examination. When photographing the anterior segment of the eye under examination, the working distance, which is the distance between the eye under examination and the objective lens, is greater than the working distance when photographing the posterior segment, and the scanning beam from the vertical scanning unit is focused on the anterior segment of the eye under examination. The scanning direction of the scanning beam by the vertical scanning unit is the same when photographing the posterior segment and when photographing the anterior segment.

The utility model provides an ophthalmic lens, and relates to the technical field of ophthalmic optics. An optical part of the lens has a geometric center, and the focal power of any point of the optical part and the focal power of the geometric center meet one of the following conditions: the focal power of any point of the optical part is greater than the focal power of the geometric center; the focal power of any point of the optical part is smaller than that of the geometric center; the focal power of partial points of the optical part is greater than the focal power of the geometric center, and the focal power of the rest points is equal to the focal power of the geometric center; the focal power of partial points of the optical part is smaller than the focal power of the geometric center, and the focal power of the remaining points is equal to the focal power of the geometric center. The focal power on the circumference is continuously distributed along the circumference at any radius by taking the geometric center as the circle center, and the distribution trends of the focal power on at least two angles along the radius are different, so that the lens is better matched with the field angle of the lens, and the lens defocusing amounts of different angles in the corresponding field angle range are basically the same.

The application discloses a kind of optometry methods for high-precision multi-type combination, it is characterized in that, including the following steps: S1, by automatic optometry instrument obtains objective refraction parameter set;S2, based on virtual reality interface implements interactive subjective optometry, generates subjective correction parameter set;S3, using wavefront aberration instrument collection high-order aberration data;S4, carries out refraction adaptability test under dynamic visual scene, obtains dynamic compensation parameter;S5, by multimodal data fusion algorithm generates initial optometry scheme;S6, based on genetic algorithm optimization lens parameter combination;S7, implements double-blind verification test and obtains visual quality score;S8, according to verification result iteration optimization final prescription.It is solved that traditional optometry is in the problem of subjective or objective data split, dynamic visual scene is accurately adapted using eye movement tracking and virtual reality verification, and the safety and efficiency of ophthalmic optical optometry are guaranteed.

The invention belongs to the technical field of ophthalmic optics, and relates to a microstructure myopia prevention and control lens and a design method thereof.The microstructure myopia prevention and control lens comprises a mother lens and a negative microlens array, and the mother lens comprises a central bright vision area and a regulation and control area; the negative micro lens array is arranged on the surface of the regulation and control area of the mother lens and comprises a plurality of even-order aspheric negative lenses arranged in an array mode, and the main curvature of each even-order aspheric negative lens changes from a negative value to a positive value from the center to the edge. According to the micro-structure lens with the even-order aspheric negative lens with the main curvature changing from the negative value to the positive value from the center to the edge, the light deflection angle of most of the area surrounding the center on the micro-structure can be increased, so that the aberration of medium-aperture and small-aperture light passing through the micro-structure is increased; the inhibition effect of the lens on the retina imaging contrast in a low-frequency band is further improved, the retina imaging contrast is reduced to be maximized under the condition of the same microstructure rise, and therefore the optimal effect of inhibiting the myopia progress is achieved.

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.

An optical system is capable observing a peripheral field away from a visual axis and includes a reflection mirror unit forming an image of an examined eye with two concave mirrors in an opposing arrangement facing each other at the examined eye side, this being the upstream side, of a first optical unit and a second optical unit. In the reflection unit there is a conjugate relationship between one focal point thereof and another focal point thereof. By forming an image of the examined eye using the reflection unit a distance can be secured between the examined eye and the optical system and a wide range of the examined eye can be observed.

An optical lens to slow down the progression of vision impairment An optical lens intended to be worn in front of an eye of a wearer to correct a vision impairment and to slow down the progression of said vision impairment of an eye of a wearer, said ophthalmic optical lens having a substrate, a front surface and a back surface, said ophthalmic optical lens comprises a plurality of optical elements, wherein: at least one light ray passing through the optical lens over a pupil having at least a 4 mm diameter passes through at least one of the plurality of optical elements, wherein over the said pupil the optical lens produces a first optical path map (OPD1), a best atorical form fitting of the first optical path map (OPD1) produces a second optical path difference map (OPD2), a differential optical path map (DOP) being composed as the difference between said first optical path difference map (OPD1) and said second optical path difference map (OPD2), each optical element produces constant phase shifting so that the differential optical path map (DOP) is a piecewise constant surface of at least two levels and at least part of the at least two levels is spatially randomly distributed.

1. Name of the designed product: biometer (ophthalmic optics). 2. Use of the designed product: biometer for ophthalmology. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.

Systems and methods for performing ophthalmic optical coherence tomography with multiple resolutions are disclosed. In some embodiments, a system includes a light source, an output lens, and a set of optical components between the light source and the output lens, the set of optical components including an afocal zoom telescope. The set of optical components is adapted to provide imaging at a first field of view having a first resolution and at a second field of view having a second resolution, where the first field of view is wider than the second field of view and the second resolution is higher than the first resolution. Methods of performing ophthalmic optical coherence tomography with one or more resolutions can be performed using one or more of the systems described herein.

The invention relates to the technical field of myopia prevention and control and ophthalmology optics, and discloses a myopia prevention and control optical element with a spectral selectivity contrast adjustment function and an active system. In order to solve the problems of granular sensation, full-spectrum white fog sensation and incapability of accurately utilizing longitudinal chromatic aberration to provide spectral selective contrast regulation signals in the prior art, a nano scatterer of 1nm-150nm is arranged on the inner / surface of an optical substrate, and the contrast of a short wavelength channel is lower than that of a long wavelength channel by utilizing Rayleigh scattering, so that the specific haze difference requirement is met; the active system can dynamically regulate and control the contrast in cooperation with the light-emitting source and the control module. The lens is free of granular sensation, does not sacrifice central visual acuity, is suitable for spectacle lenses, hanging lenses and the like, and can be combined with a defocus lens and a far image screen to realize efficient myopia prevention and control.

An ophthalmic optical system for observing an subject eye, including: an objective optical system that forms a pupil that has a conjugate relationship with a pupil of the subject eye, wherein, given that a distance from a pupil position that has a conjugate relationship with the pupil of the subject eye to the pupil of the subject eye is L, and a sum of central hicknesses of lenses included in the objective optical system is D, a conditional expression expressed by0.1≤D / L≤0.2⁢5is satisfied.

The present disclosure relates to an ophthalmological optical device for modifying at least one parameter of a treatment laser beam used for treating an eye of a patient and to an ophthalmological laser treatment device comprising the ophthalmological optical device, the ophthalmological optical device comprising a housing, an optical component, which is arranged in an interior of the housing, and which is configured to modify at least one parameter of the treatment laser beam, a support assembly, which is arranged at least partially in the interior of the housing and which is configured to position the optical component in the interior of the housing and a temperature control assembly, which is configured to control the temperature of the optical component.

The invention belongs to the technical field of ophthalmic optics, and relates to an inner aspheric lens design method and a lens. Constructing a meridian diopter change function of the lens on the basis that the diopter change curve of the rear surface of the lens is a weighted Gaussian function which continuously changes from the center to the edge; selecting reference points at the central point of the lens along the radius direction, and constructing and solving a diopter boundary equation set by taking the diopter value at each reference point to meet the diopter preset standard and the astigmatism preset standard of the lens main body along the radius direction at the position deviating from the central point by a preset distance, obtaining a diopter change curve of the lens based on the diopter distribution control weight and the diopter attenuation factor obtained by solving, so as to obtain a rear surface structure of the lens; judging whether a diopter preset standard and an astigmatism preset standard of the lens main body in the radius direction at a position deviating from the central point by a preset distance are met or not, and if not, adjusting the rear surface structure of the lens; and finally, designing the inner aspheric lens based on the rear surface structure of the lens.

An optical system is capable observing a peripheral field away from a visual axis and includes a reflection mirror unit forming an image of an examined eye with two concave mirrors in an opposing arrangement facing each other at the examined eye side, this being the upstream side, of a first optical unit and a second optical unit. In the reflection unit there is a conjugate relationship between one focal point thereof and another focal point thereof. By forming an image of the examined eye using the reflection unit a distance can be secured between the examined eye and the optical system and a wide range of the examined eye can be observed.

The invention discloses a self-adaptive optical spectrum imaging system, and relates to the technical field of ophthalmic optical detection. The self-adaptive optical spectral imaging system comprises a wide-spectrum illumination unit, a self-adaptive optical correction unit, a synchronous spectral imaging unit and a refraction calculation unit, illumination is carried out through a wide-spectrum light source, eye aberration is corrected in real time through self-adaptive optics, and multi-wavelength retina images are synchronously obtained through a dispersion element and an area array detector. According to the method, the refractive distribution diagram is calculated from the spectral phase gradient through Fourier phase analysis and a Levenberg-Marquardt fitting algorithm, the eye aberration is corrected in real time through adaptive optics, the diopter of each point of the retina is accurately calculated from the spectral phase gradient on the basis of the Fourier phase analysis and the Levenberg-Marquardt fitting algorithm in combination with a wide-spectrum spectral synchronous imaging technology, and the refractive distribution diagram is calculated from the spectral phase gradient through the Fourier phase analysis and the Levenberg-Marquardt fitting algorithm. And a space-time registration error caused by mismatching of sequential measurement and eyeball micro-motion in a traditional mechanical scanning mode is avoided.

The application provides a robot-assisted tracking and alignment method and device for ophthalmic optical coherence tomography, and relates to the fields of robot control technology and optical coherence tomography technology.The method comprises the following steps: system important parameter calibration and setting; camera image synchronous acquisition and image correction; image recognition based on a deep learning algorithm; calculation of a three-dimensional position and a gaze direction of a pupil based on an image recognition result; calculation of a target pose and a motion trajectory of the pupil alignment; robot servo motion control; optical coherence tomography scanning; and ophthalmic three-dimensional volume image registration.The proposed method can efficiently track and align the pupil of an individual standing freely in any posture within a large range, and can perform three-dimensional optical coherence tomography scanning after the alignment is completed, so that high-quality ophthalmic optical coherence tomography images are obtained.

The utility model provides a contact lens and a contact lens assembly, and relates to the technical field of ophthalmic optics. The contact lens comprises a central area and a peripheral area surrounding the periphery of the central area; the central region has a plurality of functional regions. As the functional area adopts an asymmetric design, the user randomly wears the same pair of lenses every day, so that the pattern design on the functional area is different from the relative position of the cornea, and the stimulation position on the retina is randomly changed; or, the user wears lenses with different designs every day, the functional area is divided into the contrast reduction area capable of reducing the contrast of the retina and the transparent area or the partial transparent area, the transparent area or the partial transparent area can be designed without design or combined with myopia defocus design, the stimulation position on the retina can be changed at any time, and the retina stimulation effect is improved. The drug resistance of eyes is greatly delayed; a better control effect can be achieved by combining retinal contrast reduction and myopia defocus design.

The application relates to the field of ophthalmic optics, and discloses an APD implant for treating presbyopia, a method comprising: obtaining basic refractive surface data by mapping a far-vision diopter component optical power in target optical parameters; obtaining diffraction phase structure data by arranging a near-vision diopter component ring belt structure; integrating two kinds of data to balance integrated aberration and obtain a composite optical surface data set; converting phase change amount in the composite optical surface data set into initial step height in combination with lens material and environmental medium optical constants; optimizing the diffraction structure topography parameters based on material dispersion attributes; taking surface geometric positions as processing nodes and taking topological and depth evolution relationships as processing edges to construct a digital processing map; and constructing a microstructure on the surface of an optical polymer substrate according to the digital processing map to obtain the APD implant. The application can improve the processing efficiency and optical adaptability of the APD implant.