104 results about "Slit lamp" patented technology

The invention discloses a multi-granularity cataract classification method and system based on lesion perception, belongs to the field of computer vision and medical image analysis, and is characterized in that a slit lamp image is used as input data, and a lesion perception feature extraction method is adopted, so that a model can accurately focus a lesion area, and the accuracy of cataract classification is improved; a focus region with high weight features is screened out by adopting mutual attention calculation and a maximum connected region search algorithm, and it is ensured that the classification model can focus on core features of the focus region; through a fine-grained feature optimization module, in combination with up-sampling convolution, expansion convolution and jump connection strategies, fine-grained information of a lesion area is enhanced, and the capability of distinguishing different types of cataract is improved. According to the method, high-value focus information can be extracted from complex slit lamp image data, real-time and high-precision multi-granularity cataract classification is realized, clinical diagnosis is assisted, and early cataract screening and treatment efficiency is improved.

The invention relates to the technical field of deep learning and medical image recognition, and discloses a small target segmentation method for ocular surface diseases. According to the scheme provided by the invention, ResNeXt packet convolution is introduced into Backbone to enhance feature diversity, a channel attention (CA) module is added behind an output layer to optimize a dependency relationship between channels, and a bottom-up feature enhancement branch is added in a feature pyramid (FPN) structure to form a bidirectional information flow, so that semantic expression and spatial positioning are considered. In combination with an improved region generation network (RPN), an ROI Align and a multi-task loss function (classification loss Lcls, mask loss Lmask and bounding box loss Lbox), the small target segmentation performance can be remarkably improved while the calculation efficiency is kept. In a slit lamp eye surface data set experiment, the small focus Dice coefficient of the method is improved by about 12%, the omission factor is reduced by 9%, the defects of an existing method in small target segmentation are effectively overcome, and the method has good clinical application value.

The invention discloses a continuous optical zoom slit-lamp microscope system and an inspection method and application thereof, and belongs to the technical field of ophthalmology medical equipment. The system is composed of a continuous zooming module, a light source module, a data processing module, a 3D imaging module and an AI identification module. The inspection method comprises the steps of equipment initialization and head position fixation of an inspected person, AI low-magnification (5 *) preliminary screening, adaptive lens high-magnification (40 *) fine observation, dynamic light source adjustment, three-dimensional data acquisition and cloud intelligent diagnosis. The method is applied to examination and intelligent diagnosis of eye diseases such as cataract. The problems that a traditional slit-lamp microscope is discontinuous in zooming, inconvenient to operate, lack of intelligent diagnosis and free of 3D stereoscopic display are solved, and the objective of the invention is to realize simple and convenient equipment operation, continuous examination process, intelligent diagnosis and stereoscopic display, facilitate collective teaching, significantly improve the diagnosis efficiency and accuracy of eye diseases such as cataract and the like, and improve the diagnosis efficiency and accuracy of eye diseases such as cataract and the like. And DICOM standard data cloud sharing and remote consultation are supported.

The slit lamp comprises a shell, a light source assembly, a slit assembly, an optical filter assembly, a diffractive optical element and a reflector assembly, wherein the light source assembly, the slit assembly, the optical filter assembly, the diffractive optical element and the reflector assembly are installed in the shell. Wherein the optical filter assembly comprises a plurality of optical filters and a driving unit, and the driving unit is used for driving one optical filter to move into an optical path; the reflecting mirror assembly comprises a reflecting mirror and a reflecting mirror seat, and the reflecting mirror seat is rotationally connected with the shell; according to the slit lamp, the rotatable optical filter and the diffractive optical element are arranged, so that the slit effect is slender, a better lighting effect is achieved, and the accuracy of an operation is improved.

The application discloses a kind of based on lesion perception multi-granularity cataract classification method and system, belong to computer vision and medical image analysis field, take slit lamp image as input data, adopt lesion perception feature extraction method, make model can accurately focus on lesion area, improve the accuracy of cataract classification;Adopt mutual attention calculation and maximum connected region search algorithm, filter out the lesion area of high weight feature, ensure that classification model can focus on the core features of lesion area;Through fine-grained feature optimization module, combined with up-sampling convolution, dilated convolution and jump connection strategy, enhance the fine-grained information of lesion area, improve the distinguishing ability of different types of cataract.The application can extract high-value lesion information from complex slit lamp image data, realize real-time, high-precision multi-granularity cataract classification, assist clinical diagnosis, improve the screening and treatment efficiency of early cataract.

The invention provides an ophthalmic examination auxiliary device, and relates to the technical field of ophthalmic examination, the ophthalmic examination auxiliary device comprises a base, a mounting seat fixedly connected with one side of the base, a support frame arranged on the working surface of the top end of the mounting seat, and an eyelid turning mechanism connected with the support frame through a moving mechanism; a lower jaw supporting plate is arranged on the mounting seat, and the lower jaw supporting plate is positioned on the opposite side of the supporting frame; the support frame is clamped with the forehead support plate; the eyelid turning mechanism comprises oppositely-arranged limiting frames, an adjusting piece penetrating through the limiting frames and an eyelid opener connected with the telescopic end of the adjusting piece. The limiting frame has an inclined radian matched with an eyelid; through the arrangement of the eyelid turning mechanism, the limiting frame and the adjusting piece which are matched with the radian of the eyelid are adopted, multi-point accurate force application can be carried out according to the wrinkle sagging conditions of different positions of the eyes of the old people, so that the eyelid is stably and comprehensively turned over, and a clear and unshielded observation view is provided for slit lamp inspection.

The invention discloses an optical system for high-speed reduction of a dynamic deformation process of a cornea, which realizes high-precision analysis of physical characteristics of the cornea through a high-speed imaging technology, performs error compensation on the physical characteristics and realizes high-precision calculation of intraocular pressure. According to the technical scheme, the optical system comprises a slit lamp light source used for forming a cornea optical slice and ensuring the definition and the contrast ratio of a cornea slice image; the Samm lens is used for shooting a cornea optical section, inclined imaging light path design is adopted, and the depth of field meets the requirement that the cornea section keeps clear imaging in the dynamic process; and the high-speed camera is positioned behind the Chemma lens and is used for receiving the cornea optical slice image imaged by the Chemma lens so as to record the dynamic deformation process of the cornea.

A slit lamp microscope of an embodiment includes an image acquiring unit, a memory, and a misalignment information acquiring processor. The image acquiring unit is configured to acquire an image by applying a scan with slit light to an anterior segment of a subject's eye. The memory stores a first image of the anterior segment and a second image that is acquired by follow-up photography performed by the image acquiring unit with reference to the first image. The misalignment information acquiring processor is configured to acquire misalignment information between the first image and the second image by analyzing the first image and the second image after the follow-up photography.

The invention discloses a slit lamp image-based open-angle glaucoma deep learning identification method and system, and relates to the technical field of artificial intelligence and medical diagnosis crossing. The method comprises the steps of preprocessing a slit lamp image and basic clinical data of a target object, processing a standardized image by adopting a pre-trained deep learning model, and performing feature fusion on image depth features and standardized data by adopting a multi-modal feature fusion network. According to the method, automatic classification of two main glaucoma types is achieved, and the problems that in the prior art, distinguishing angle-separating glaucoma from angle-closing glaucoma mainly depends on doctor experience, subjectivity is high, efficiency is not high, traditional chamber angle microscopy examination is high in contact performance, and an existing AI method usually depends on OCT and other special equipment are solved. And objective and efficient auxiliary decision making is provided for clinical diagnosis.

The invention discloses an ophthalmology department preoperative auxiliary examination device which comprises a control table and a slit lamp, a bearing mechanism is connected to the control table, a protection mechanism comprises a mounting strip and a rotating assembly, a winding roller and a non-woven fabric roll are mounted on the mounting strip through the rotating assembly, a guide mechanism is connected to a bearing frame, and the guide mechanism is connected to a guide rod. The guide block is connected with a guide assembly used for assisting the color disc. According to the ophthalmology preoperative auxiliary examination device, the bearing frame is pulled downwards, the ophthalmology preoperative auxiliary examination device is suitable for different crowds, the bearing frame is held by a hand, the input feeling of a patient can be improved, the detection effect is guaranteed, the forehead and the jaw are attached to a non-woven fabric roll on a rubber roller for detection, after detection is completed, used non-woven fabric is automatically rolled, and the detection efficiency is improved. When the non-woven fabric section is used by the next person, the non-woven fabric section is not used, so that disease infection is avoided, the patient can see the through groove and the correction sight of the color disc, the distinguishing blocks in different color areas are different, and the concentration degree can be trained.

The invention discloses a modular integrated rapid ophthalmology screening vehicle and an examination method thereof, and relates to the technical field of ophthalmology examination. The inspection mechanism is mounted on the rear side of the bottom inner wall of the screening vehicle body; the two shading mechanisms are mounted between the top inner wall and the bottom inner wall of the screening vehicle body; through cooperative work of the vision detection module, the fundus imaging module, the intraocular pressure detection module, the slit lamp module and the AI auxiliary diagnosis module, and efficient interconnection between equipment in each module and the host server through USB-C and HDMI dual interfaces with unified specifications, the functional modules can be flexibly increased or decreased according to requirements of different screening scenes; the problems that a traditional whole machine integrated device is complex in structure and large in deployment difficulty are solved, multi-dimensional detection such as refraction detection, fundus imaging and intraocular pressure measurement can be completed through professional devices of all the modules, the screening efficiency and diagnosis accuracy are greatly improved, and the coverage range of ophthalmology screening service is effectively expanded.

An additional polaroid mechanism of a slit lamp microscope comprises a polarization analyzing part and a polarizing part, the polarizing part is detachably installed on a reflecting mirror surface or a prism projected by a slit lamp light source, and the polarization analyzing part is detachably installed on a lens at the objective lens end of a slit lamp; the polarization analyzing part and the polarizing part are respectively composed of a polaroid and a fixing part, the polaroid and the fixing part are detachably connected, and the polarization direction of the polaroid of the polarization analyzing part and the polarization direction of the polaroid of the polarizing part are orthogonally intersected. Through the structure, the slit lamp microscope can eliminate redundant reflected light, so that lesions of parts such as eyelids and eye rims can be clearly observed, and the slit lamp microscope can be adapted to slit lamps of different manufacturers.

A cataract classification method based on color equivariant and frequency domain attention belongs to the technical field of computer vision and medical artificial intelligence, uses eye images shot by a slit lamp as an input data source, and constructs a CFC-Mama classification network integrated with a color equivariant fusion module and a frequency domain channel attention module to classify cataracts. The model can effectively extract color robust features with unchanged equipment, and the high-frequency detail perception capability of the cataract lesion boundary is enhanced; a color isotropic convolution and cross attention fusion mechanism is adopted to solve the color shift problem caused by different imaging devices, and the cross-device robustness of feature extraction is ensured; through a frequency domain channel attention module, in combination with Fourier transform, high-pass filtering and a double-path channel attention strategy, high-frequency features of lesion boundaries are highlighted, and the fine-grained feature expression ability is improved. The invention further provides a cataract classification system based on color equivariant and frequency domain attention. According to the invention, high-precision classification of multi-granularity cataract is realized.

The utility model provides a prevent cross infection formula slit lamp bracket, including base, the base top surface one side is provided with slit lamp, the top surface other side is equipped with peripheral support, the inside bottom of peripheral support is equipped with lower column, the top of lower column is equipped with arc shaped supporting plate, the top surface of arc shaped supporting plate is overlapped with isolation paper piece, and the isolation paper piece that overlaps is fixed on arc shaped supporting plate through locating screw rod, peripheral support top surface is provided with paper drawing assembly, and paper drawing assembly inside accomodates paper tube, and the outside of paper tube is wound with isolation paper roll, and the top outside wall of peripheral support is fixed with forehead pad, and the end of isolation paper roll is outside and reaches forehead pad, the inboard wall rotationally connects of peripheral support is with forehead stop component, and forehead stop component is used to overturn positioning paper drawing assembly. The utility model discloses a disposable isolation paper is used to the forehead and chin of bracket is isolated and protected, and effectively prevents contact infection, and is convenient to replace.

Provided is an ophthalmological device capable of obtaining a brighter and clearer inspection image.　A slit lamp microscope (100) comprises: a background illumination system (60); an imaging unit (50); and a control unit (20). The control unit (20) comprises an inspection image generation unit (21) that generates an inspection image of an inspected eye, on the basis of images captured by the imaging unit (50). The inspection image generation unit (21) has: an image acquisition unit (24) that acquires, from the imaging unit (50), a plurality of images captured through imaging an inspected eye while changing the illumination direction of illumination light with respect to the inspected eye; an image extraction unit (25) that extracts, as a partial image, a portion at which focus is achieved from the plurality of images acquired by the image acquisition unit (24); and an image combination unit (26) that combines a plurality of the partial images extracted by the image extraction unit (25) together to generate an inspection image.

The embodiment of the application provides a slit lamp module, comprising: a support, a light source, an adjusting part, a reflecting mechanism and a light uniformizing sheet; the light source and the reflecting mechanism are fixedly connected to the support; the adjusting part is movably connected to the support and located between the light source and the reflecting mechanism, the adjusting part is provided with a first light passing hole and a second light passing hole with different shapes; the reflecting mechanism is provided with a light inlet hole and a light outlet hole; the slit lamp module has a first working state and a second working state; in the first working state, light emitted by the light source is projected to the outside after sequentially passing through the first light passing hole, the light inlet hole, the light outlet hole and the light uniformizing sheet; in the second working state, light emitted by the light source is projected to the outside after sequentially passing through the second light passing hole, the light inlet hole and the light outlet hole. The problems of large volume and complex operation of a traditional slit lamp can be solved.

1. The name of the design product: image device. 2. The use of the design product: accessories for surgical microscope, slit lamp. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

1. The name of the design product: background light source module. 2. The use of the design product: used for lighting for a slit lamp microscope. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

A method (1) of centring a camera on a pupil involves capturing an image frame. A first pupil centre determination algorithm (12) is performed on the captured frame and a second pupil centre determination algorithm (13) is used simultaneously with the first pupil centre determination algorithm (12), upon the same captured frame. The first and second pupil centre determination algorithm (12, 13) will, return multiple first and second potential pupil centres PD,PL which are compared (14) with each other, to determine the distance between each pair of first and second potential pupil centres PD,PL. If the distance between the closest pair of first and second potential pupil centres PD,PL is below a predetermined threshold value, then the midpoint of said closest first and second potential pupil centres PD,PL is defined as the final pupil centre (15).

The invention relates to the technical field of slit lamps, in particular to a slit light adjusting device and a motor auxiliary control method for slit width adjustment. The device comprises an illumination angle adjusting mechanism and a crack width adjusting mechanism. The crack width adjusting mechanism comprises a rotary knob, a transmission shaft, a rotary knob end gear, an encoder gear, an encoder and a crack opening and closing executing mechanism. The knob drives the knob end gear to rotate through the transmission shaft, the encoder gear is meshed with the knob end gear and installed on the encoder input shaft, a shared transmission path is formed, the knob rotates to be synchronously transmitted to the encoder, and signals of the encoder drive the opening and closing motor. The spring assembly is arranged below the encoder and pushes the encoder gear upwards to eliminate the meshing clearance. According to the device, the problem that a traditional manual structure lacks electric control cooperation is solved, through the common path and spring design, idle stroke is avoided, instant response and consistent hand feeling of bidirectional adjustment are ensured, and motor assistance, remote control and automatic calibration are supported.

This invention relates to a method for diagnosing keratoconus by analyzing the geometric properties of Purkinje images. The method involves capturing Purkinje images of the cornea using a low-cost and simple device, such as a smartphone attachment, making it more accessible than current diagnostic tools like slit lamps. By comparing these images to reference images from healthy corneas, significant shifts and distortions are identified as indicators of keratoconus. This non-invasive tool provides an accessible and cost-effective means for early detection and ongoing monitoring. The method's reliability is ensured through extensive data collection from both healthy and keratoconic corneas. This approach offers primary assessments, especially in areas lacking access to advanced medical care, potentially reducing the need for more invasive procedures.

The invention discloses a wide-area slit-lamp microscope based on a deflection liquid lens and a control method of the wide-area slit-lamp microscope, and belongs to the technical field of ophthalmic medical equipment. The system comprises a deflection zooming module and an intelligent lighting module, view field deflection and zooming are achieved through an electric control liquid lens, a slit light source is controlled in combination with synchronous servo, and the control method comprises wide area scanning, dynamic zooming deflection, intelligent lighting optimization and data archiving. The method is suitable for wide-area examination of the microscopic structure of the eye, and is especially beneficial to examination of peripheral retina conditions. The wide-area slit-lamp microscope disclosed by the invention can break through the limitation of small view field of a traditional slit lamp, and can effectively overcome the invasive operation risk faced by means of a contact type lens in order to enlarge the view field. According to the invention, the examination range can be expanded in a non-contact, non-invasive, efficient, clear and visual manner in the whole examination process, great advantages are provided in the aspect of comprehensive observation of eye tissues, the acquisition of a more comprehensive microscopic structure of eyes is facilitated, and faster and more accurate diagnosis of eye diseases is facilitated.

The application discloses a corneal disease image detection and classification method and device based on local and global information, and the method comprises the following steps: segmenting an image to obtain a superpixel lesion area set; extracting local features and global features; obtaining superpixel lesion area feature representation combined with local and global information; performing classification training by using global main features combined with local features, and making a prediction on a corneal disease slit lamp image; performing unsupervised clustering and category representation on the superpixel lesion area, and visually displaying abnormal lesion areas in the corneal disease slit lamp image. The corneal disease image detection and classification method and device based on local and global information can effectively extract global features and lesion area local features of the slit lamp image, perform feature fusion on the abnormal areas, realize image classification and abnormal area display.

The utility model belongs to the technical field of ophthalmology medical instruments, and particularly relates to an auxiliary shooting support for a digital slit lamp microscope, which consists of a base, a connecting mechanism and a lens mounting component, and has the characteristics of reasonable structure, convenience in operation, good stability and the like. The base adopts a clamping design and can be firmly fixed at the edge of a table plate, so that the stability in shooting is ensured. The connecting mechanism adopts a multi-joint design and is equipped with an elastic structure design, so that not only can multi-directional flexible adjustment be realized, but also a stable state can be automatically kept after adjustment, and accurate positioning is facilitated. The lens mounting part can be compatible with lenses of various specifications and supports fine adjustment of the positions of the lenses in a bracket fixing state, so that the shooting requirement is met. According to the utility model, the shooting range of the digital slit-lamp microscope is effectively expanded, synchronous shooting of two eyes is realized, the accuracy of external eye image acquisition is improved, the accuracy and the working efficiency of clinical diagnosis of the ophthalmology department are improved, and reliable technical support is provided for diagnosis and treatment.

To provide an ophthalmologic apparatus capable of obtaining a brighter and clearer examination image.SOLUTION: A slit lamp microscope 100 includes a background illumination system 60, an imaging unit 50, and a control unit 20. The controller 20 includes an examination image generator 21 configured to generate an examination image of the subject's eye E based on the image captured by the imaging unit 50. The examination image generation unit 21 includes an image acquisition unit 24 that acquires, from the imaging unit 50, a plurality of images obtained by imaging the subject's eye E while changing the illumination direction of the illumination light with respect to the subject's eye E, an image extraction unit 25 that extracts a focused portion as a partial image from the plurality of images acquired by the image acquisition unit 24, and an image synthesis unit 26 that synthesizes the plurality of partial images extracted by the image extraction unit 25 to generate an examination image.SELECTED DRAWING: Figure 2

A slit lamp microscope of an aspect example includes a scanner and a data processor. The scanner is configured to scan an anterior segment of a subject's eye with slit light to collect a plurality of cross sectional images. The data processor is configured to generate opacity distribution information that represents a distribution of an opaque area in a crystalline lens, based on the plurality of cross sectional images collected by the scanner.

The invention relates to the technical field of experimental animal models, in particular to an establishment method and application of a rat radioactive cataract model. According to the invention, a rat cataract model induced by irradiation of X-rays with different doses (10 Gy, 20 Gy and 30 Gy) is constructed. Through multi-dimensional evaluation such as general situation observation, slit lamp inspection and histopathologic analysis, the influence of ionization radiation (IR) on the crystalline lens is systematically observed. The animal model successfully reproduces pathological manifestations of different radiation-damaged crystalline lenses, and an experimental basis is provided for further research on pathogenesis of radiation-induced cataract.

The application discloses a kind of multi-purpose portable ophthalmic examination device and method, it is related to medical equipment technical field, the scheme includes box, the inside of the box is equipped with two placing grooves, the inside of the placing groove is placed with eye detection device, the top of the box is hinged to be connected with lid, the inside of the box is sequentially embedded fixedly installed with two operation panels, the inside of the lid is embedded fixedly installed with display screen, two eye detection devices can be stored and fixed in the application, and it is convenient to carry and move, by being provided with display screen, operation panel and eye detection device, when using, eye detection condition can be directly displayed on display screen, manual observation is not needed, to reduce work burden, users can directly control eye detection device by operation panel, the position and angle of slit lamp can also be changed when using, to facilitate eye examination for different patients.

1. The name of the design product: portable slit lamp. 2. The use of the design product: the design product is used for ophthalmic medical treatment in mobile scenarios. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: front view.