43340 results about "Optometry" patented technology

The invention discloses an optical lens which is sequentially arranged from an object side to an image side along an optical axis of the lens: a first lens which is a glass lens with negative focal power; the second lens has negative focal power; the third lens is provided with positive focal power; a fourth lens, wherein the fourth lens has positive focal power or negative focal power; an aperture stop; a fifth lens, wherein the fifth lens has a positive focal power or a negative focal power; a sixth lens having a positive focal power or a negative focal power; a seventh lens having a positive focal power or a negative focal power; and the eighth lens is a plastic lens with positive focal power or negative focal power. The lens is formed by mixing glass and plastic, the field angle is larger than or equal to 200 degrees, the aperture is larger than or equal to 1.9, and the lens has the advantages of being large in field of view, large in aperture, high in imaging quality and high in brightness.

The invention provides an optical lens, which comprises six lenses which sequentially comprise a first lens with negative focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power from an object side to an imaging surface, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the object side surface and the image side surface of the third lens are convex surfaces; the fourth lens has positive focal power, and the object side surface of the fourth lens is a convex surface; the fifth lens has negative focal power, and the image side surface of the fifth lens is a concave surface; and the sixth lens has positive focal power. According to the optical lens provided by the invention, the six lenses with specific focal power are adopted, and through specific surface shape matching and reasonable focal power distribution, the imaging quality of the optical lens can be improved, the aberration can be reduced, the imaging quality of the optical lens can be improved, and the lens has one or more advantages of large target surface, large aperture, high imaging quality and the like.

The invention relates to the technical field of visual inspection, and particularly discloses an optical communication filter appearance defect detection method and related device.The optical communication filter appearance defect detection method comprises the steps that polarization image sets of an optical communication filter to be detected at different polarization angles are obtained; preprocessing the polarization image set to obtain a defect enhancement image set; performing defect detection on the defect enhancement image set based on a pre-trained multispectral attention fusion network; according to the method, multi-polarization information, special preprocessing and a deep learning network combined with frequency domain-space feature fusion and a cross-modal attention mechanism are utilized, the detection capacity of the defects which are tiny, low in contrast and interfered by film layer textures on an optical communication filter is improved, and the omission ratio is reduced.

The present disclosure relates to the technical field of optics, and particularly relates to an optical lens and an electronic device. The optical lens of the present disclosure comprises an aperture stop and a plurality of lens units which are sequentially and coaxially arranged from an object side to an image side; a plurality of lens units are provided on the side of the aperture stop facing the object side, forming a stop front lens unit group; a plurality of lens units are provided on the side of the aperture stop facing the image side, forming a stop rear lens unit group; the number of lens units of the stop front lens unit group is the same as the number of lens units of the stop rear lens unit group, symmetrically offsetting distortion, thereby facilitating reduction of optical distortion of the optical lens; and the stop front lens unit group has negative refractive power, the stop rear lens unit group has positive refractive power, and the stop front lens unit group and the stop rear lens unit group form aberration compensation to improve the imaging performance of the optical lens. The lens unit closest to the object side has positive refractive power to converge large-angle off-axis beams, achieving a large field of view angle of the optical lens and reducing a clear aperture of an optical path at the same time, thereby achieving miniaturization of an optical path structure.

A helmet visor system may include a helmet shaped to accommodate a headset, a visor lens and a visor apparatus to pivotally move the visor lens between a stored position and a deployed position. The deployed position may be defined as a majority of the visor lens being extended from the helmet, and the stored position may be defined as the majority of the visor lens being occluded by the helmet within an interior of the helmet. The visor lens may be pivotally moveable between the stored position and the deployed position so as not to interfere with the headset.

Disclosed herein are drug delivery devices and methods for the treatment of ocular disorders requiring targeted and controlled administration of a drug to an interior portion of the eye for reduction or prevention of symptoms of the disorder. The devices are capable of controlled release of one or more drugs and may also include structures which allows for treatment of increased intraocular pressure by permitting aqueous humor to flow out of the anterior chamber of the eye through the device.

The invention discloses an intelligent control method and system for AR equipment, and the method specifically comprises the steps: determining a pupil center position coordinate and a cornea reflection point position coordinate of a user according to an eye image of the user, and inputting the pupil center position coordinate and the cornea reflection point position coordinate into a geometric mapping model for matching, obtaining user sight direction information; acquiring image brightness value distribution of an area near a user fixation point, determining a plurality of candidate saliency areas according to the image brightness value distribution, and comparing the candidate saliency areas with a preset saliency area template to determine a user attention focus; and acquiring head posture information of the user in real time by adopting a head posture tracking algorithm, and dynamically controlling the shooting direction of a camera of the AR equipment according to the head posture information, the sight direction information of the user and the attention focus of the user. According to the method and the device, accurate alignment of the AR content and the visual focus of the user is realized, and the immersion and interaction experience of the AR application are greatly improved.

Disclosed herein are drug delivery devices and methods for the treatment of ocular disorders requiring targeted and controlled administration of a drug to an interior portion of the eye for reduction or prevention of symptoms of the disorder. The devices are capable of controlled release of one or more drugs and may also include structures which allows for treatment of increased intraocular pressure by permitting aqueous humor to flow out of the anterior chamber of the eye through the device.

Disclosed herein are drug delivery devices and methods for the treatment of ocular disorders requiring targeted and controlled administration of a drug to an interior portion of the eye for reduction or prevention of symptoms of the disorder. The devices are capable of controlled release of one or more drugs and may also include structures which allow for treatment of increased intraocular pressure by permitting aqueous humor to flow out of the anterior chamber of the eye through the device.

An innovative protective football helmet includes a durable shell having an impact attenuation system, a visor system with a visor, a lower chin bar assembly, and internal impact attenuation assembly. The connection of the visor to the shell is “tool-less,” meaning that no unique tool is required for coupling or removing the visor system. The visor system is not coupled to the lower chin bar assembly, which allows the visor to independently flex and independently elastically deform relative to the chin bar assembly. The visor is configured to match a substantial extent of the frontal shell region, thus the visor does not need to be substantially deformed during the installation process, which eliminates the introduction of additional stresses on the visor during the installation process. The visor also replaces a significant upper extent of a conventional facemask that is both heavy and costly to manufacture. Due to the design of the helmet and visor system, there is a significant increase in the player's field of view through the frontal helmet opening and the visor. This increase in the field of view provides greater situational awareness for the player and allows the player to reduce the amount of head rotation necessary to see objects or other players when the player is engaged in playing the sport.

Disclosed herein are drug delivery devices and methods for the treatment of ocular disorders requiring targeted and controlled administration of a drug to an interior portion of the eye for reduction or prevention of symptoms of the disorder. The devices are capable of controlled release of one or more drugs and may also include structures which allow for treatment of increased intraocular pressure by permitting aqueous humor to flow out of the anterior chamber of the eye through the device.

Some embodiments disclosed herein relate to devices and methods for controlling placement of intraocular implants within a patient's eye including but not limited to placement within or near the collector ducts of Schlemm's canal located behind the trabecular meshwork. In some embodiments, a handheld peristaltic rotor device having a compression element can be positioned on a corneal surface of the eye and rotated to create a peristaltic movement of blood in one or more episcleral veins to generate blood reflux within Schlemm's canal such that one or more collector ducts, or channels, of Schlemm's canal can be located. In some embodiments, an implant can be implanted near the identified location of the one or more collector ducts, or channels.

The invention provides an optical lens, which sequentially comprises a first lens with negative focal power from an object side to an imaging surface along an optical axis, a second lens with negative focal power, a third lens with positive focal power and a fourth lens with negative focal power from the object side to the imaging surface, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface; the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a convex surface; and the object side surface of the eighth lens is a convex surface, and the image side surface of the eighth lens is a concave surface. According to the optical lens, through specific surface shape matching and reasonable focal power distribution, the imaging quality of the optical lens can be improved, and the optical lens has the advantage of being good in imaging quality.

The present application provides a method for diagnosing and / or evaluating the presence or absence, severity or degree of the improvement of a retinal disease in a subject, which comprises determining and / or evaluating circulatory parameters, retinal function, retina morphology and / or visual relating quality of life (QOL).

A computer-implemented system and method for pupil-directed retinal projection in near-eye displays are disclosed. The computer-implemented system provides smart glasses with directed physical pixels that project light beams / signals directly onto a user's retina based on pupil position and size. The glasses comprise a frame, lenses with directed pixel layers, and sensors for tracking pupil movement. Each directed pixel may generate multiple virtual pixels by rapidly changing its emission angle. The glasses function as prescription lenses, virtual reality displays, and augmented reality devices without traditional optical systems. Additional features include depth sensors, cameras, and connectivity to peripheral devices. The glasses enable a seamless blend of virtual and real-world experiences, creating an immersive “Mixverse” environment. Various input methods, including gesture recognition and brain-computer interfaces, allow for intuitive control and interaction.

Embodiments of the present invention provide a phototherapy mask designed to enhance user comfort and effectiveness during treatment. The mask comprises a shell that fits over the user's face, featuring a first opening to avoid contact with the eyes and a second opening to avoid the nose. A first pad, positioned around the edge of the first opening, rests against the skin near the peripheral eyes to control the distance between the mask and the skin, while a second pad, located at the bottom of the shell, supports the chin. These pads help maintain the mask's stability and prevent it from shifting during use. The light source assembly, installed on the shell, provides phototherapy to the skin.

A gonioscopic attachment can attach to a gonioscope and can include atraumatic retention elements that are configured to engage an eye to retain the gonioscope relative to the eye. The gonioscopic attachment can be configured to position the gonioscope so that at least a portion of the concave distal surface of the gonioscopic optical element is spaced apart from the eye, and / or so that the curvature of the distal surface is angularly offset from the curvature of the eye. The gonioscope can include a fixation point configured to be visible to the subject when the gonioscope is positioned on the eye. In some embodiments, the retention elements can be incorporated directly into the gonioscope. A coupling mechanism can couple the gonioscope to a lid speculum. The gonioscope can include a light pipe, which can be configured to directly light into the eye.

According to an embodiment, disclosed is a system comprising a processor wherein the processor is configured to receive an input data comprising an image of an ocular region of a user, clinical data of the user, and external factors; extract, using an image processing module comprising adaptive filtering techniques, ocular characteristics, combine, using a multimodal fusion module, the input data to determine a holistic health embedding; detect, based on a machine learning model and the holistic health embedding, a first output comprising likelihood of myopia, and severity of myopia; predict, based on the machine learning model and the holistic health embedding, a second output comprising an onset of myopia and a progression of myopia in the user; and wherein the machine learning model is a pre-trained model; and wherein the system is configured for myopia prognosis powered by multimodal data.

The invention provides a pharmaceutical composition for use in the prevention or therapy of glaucoma, increased intraocular pressure, ocular hypertension and / or a symptom associated therewith, wherein the composition comprises tafluprost and a semifluorinated alkane.

The invention provides an optical lens, which comprises six lenses from an object side to an imaging surface along an optical axis: a first lens with positive focal power; the second lens has positive focal power; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power, and the object side surface of the sixth lens is a concave surface; the curvature radius R9 of the object side surface of the fifth lens and the curvature radius R10 of the image side surface of the fifth lens meet the formula: (R9-R10) / (R9 + R10) lt; and 0.4 part. According to the optical lens provided by the invention, the six lenses with specific focal power are adopted, and through specific surface shape matching and reasonable focal power distribution, the imaging quality of the optical lens can be improved, the aberration can be reduced, and the imaging quality of the optical lens can be improved.

An optical lens having, in total, six lenses which sequentially comprise from an object side to an imaging surface (S15) along an optical axis: a first lens (L1) having a negative focal power, an object-side surface (S1) thereof being a convex surface, and an image-side surface (S2) thereof being a concave surface; a second lens (L2) having a positive focal power, an object-side surface (S3) and an image-side surface (S4) thereof both being convex surfaces; a third lens (L3) having a positive focal power, an object-side surface (S5) thereof being a convex surface, and an image-side surface (S6) thereof being a concave surface; and a fourth lens (L4) having a negative focal power, an object-side surface (S7) and an image-side surface (S8) thereof both being concave surfaces; a fifth lens (L5) having a positive focal power, an object-side surface (S9) and an image-side surface (S10) thereof both being convex surfaces; and a sixth lens (L6) having a negative focal power, an object-side surface (S11) thereof being a convex surface, and an image-side surface (S12) being a concave surface. An effective focal length f of the optical lens and the radius of curvature R6 of the image-side surface of the third lens (L3) satisfy: R6 / f>14.0. By means of the reasonable configuration of surface type of each lens and the reasonable focal-power combination in the optical lens, the resolution of the optical lens is improved, and the aberration is reduced, thus improving the imaging quality of the optical lens.

The invention provides a digital human interaction method and system based on naked eye 3D visualization, and the method comprises the steps: obtaining query content provided by a user in a multi-modal manner, carrying out the semantic understanding and intention analysis of the query content through a natural language processing technology, and obtaining user intention data; performing matching search in a preset content database according to the user intention data, and if a highly related answer template or video clip exists, calling preset content and feeding back the preset content to the user; according to different answer sources, corresponding digital human video visualization schemes are adopted, a digital human driving engine is used for matching mouth shapes, expressions and actions, and matched digital human videos are synthesized; and displaying the digital human video through a transparent LCD screen.

The embodiment of the invention provides an optical system, intelligent head-mounted equipment and a zooming method of the optical system. The optical system is used for the intelligent head-mounted device, and the optical system comprises an imaging module, an eyeball tracking module and a processor. The imaging module comprises a zoom lens, and the eyeball tracking module is used for acquiring eyeball watching information; the processor is used for determining zoom information according to eyeball watching information provided by the eyeball tracking module and controlling the zoom lens to zoom according to the zoom information; wherein the zoom information comprises the thickness and the curvature radius of the zoom lens.

The invention relates to the technical field of ophthalmology medical diagnosis, and discloses a three-dimensional reconstruction-based fundus focus intelligent labeling method and diagnosis system. The method comprises the following steps: receiving multi-modal image data streams such as fundus color photos, OCT images and FFA images of an ophthalmological patient; performing spatial registration and feature fusion by using a pre-trained lesion feature fusion model to generate a three-dimensional lesion probability distribution diagram and a lesion category confidence matrix; constructing an adaptive annotation threshold model to generate a multi-modal annotation instruction set; based on the focus development chain model, focus development is simulated, and instruction set parameters are optimized and labeled; and iteratively optimizing through a distributed reinforcement learning framework, and outputting the focus labeling action sequence to an ophthalmology diagnosis platform. According to the method, multi-modal image information can be integrated, the diagnosis accuracy and efficiency are improved, personalized diagnosis is realized, resources are reasonably utilized, and powerful support is provided for ophthalmic disease diagnosis.

The subject invention pertains to an artificial intelligence-aided classification system for Alzheimer's disease (AD) screening from retinal photographs, which includes a three-in-one deep learning (DL)-based pre-diagnosis module for image assessment and a DL-based AD classification module with additional heatmaps for visualization. For the AD classification module, three kinds of DL models predict the AD-dementia / non-demented probabilities from three directions with both eyes' four images (Direction-1), both eyes' four images combing demographical information (Direction-2), and a single eye's two images (Direction-3), respectively. For the pre-diagnosis image assessment, embodiments provide one pre-processing model, with three additional models for each of the three classification tasks, including image-quality (e.g., gradable or ungradable), field-of-view (e.g., macula-centered or optic nerve head-centered), and laterality-of-the-eye (e.g., right or left eye). Also included is a cloud-based web application that can output the pre-diagnosis image assessment and a simple binary AD-dementia / non-demented classification based on retinal photographs.

The invention relates to the technical field of medical information, in particular to an ophthalmology information extraction system based on electronic medical records. The system comprises an electronic medical record data acquisition and cleaning module, a domain knowledge driven ophthalmology information extraction module, a multi-modal data fusion and labeling module and a structured result generation and display module, and original medical record data can be acquired; performing data cleaning on the original case data to generate a patient electronic case data set; therefore, through the whole-process modular design and multi-modal data fusion processing, the problems that in a traditional ophthalmic case information extraction mode, data processing is not coherent, information extraction is not accurate, and results are difficult to directly express are solved, and the data utilization rate and clinical application value are improved.

The invention provides an optical lens, which sequentially comprises a first lens with positive focal power from an object side to an imaging surface along an optical axis, a second lens with negative focal power, a third lens with positive focal power and a fourth lens with negative focal power from the object side to the imaging surface, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens near the optical axis is a concave surface; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens near the optical axis is a convex surface; the fifth lens has negative focal power, the object side surface of the fifth lens is a convex surface near the optical axis, and the image side surface of the fifth lens is a concave surface near the optical axis; the sixth lens has positive focal power, the object side surface of the sixth lens near the optical axis is a convex surface, and the image side surface of the sixth lens is a convex surface; and the object side surface of the seventh lens is a concave surface. The optical lens provided by the invention has one or more advantages of long focus characteristic, large target surface, large aperture, high pixel and the like.

The invention discloses an immersive space virtual-real interaction method and system, and relates to the technical field of virtual reality interaction, and the method comprises the steps: collecting a full-view scene picture and illumination data through a camera, carrying out the preprocessing, simulating the real optical characteristics according to the scene picture and illumination data, and building a virtual scene; the virtual scene is evaluated and optimized; acquiring a user gesture image for analysis, identifying a user interaction command for virtual scene interaction, and displaying an interaction result in real time; and recording and storing the user interaction command and the interaction result. According to the method, the trueness and quality of the virtual scene are effectively improved, meanwhile, the user interaction command is recognized and analyzed by collecting the user gesture image and converting the user gesture image into the three-dimensional coordinate for virtual scene interaction, the gesture recognition accuracy is improved, and the experience effect of user virtual scene interaction is greatly improved.

Described here are systems and methods for accessing Schlemm's canal and for delivering an ocular device or fluid composition therein. The ocular devices may maintain the patency of Schlemm's canal without substantially interfering with transmural fluid flow across the canal. The fluid composition may be a viscoelastic fluid that is delivered into the canal to facilitate drainage of aqueous humor by disrupting the canal and surrounding trabeculocanalicular tissues. Tools for disrupting these tissues and minimally invasive methods for treating medical conditions associated with elevated intraocular pressure, including glaucoma, are also described.