144 results about "Visual field loss" patented technology

The invention relates to the technical field of visual function diagnosis, and provides a visual function examination device based on eye movement tracking, a medium and computer equipment, the device comprises a data acquisition unit, an eye movement evaluation unit, a visual field evaluation unit and a comprehensive analysis unit, the data acquisition unit is used for acquiring visual function data of an examinee, and the comprehensive analysis unit is used for analyzing the visual function data of the examinee; the eye movement evaluation unit evaluates an eye movement function based on eye movement parameters in the visual function data; the visual field evaluation unit evaluates a visual field function based on visual field parameters in the visual function data; according to the application, objective sight drop points are used for replacing subjective keys, false negative and false positive are reduced, before typical defects do not appear in the visual field, early visual function changes can be prompted through eye movement parameter abnormity, auxiliary screening of early glaucoma and other diseases is achieved, and the visual function detection accuracy is improved. Meanwhile, the diagnosis accuracy is improved through double evidences of eye movement and visual field in the middle and late stages, and the sensitivity and specificity of visual function examination are remarkably improved on the whole.

The embodiment of the invention provides a method and equipment for dynamically adjusting a motion control mode based on an intraoperative visual field environment, a medium and a program product, and relates to the field of intelligent medical treatment. The method comprises the following steps: acquiring an intraoperative view image and a preset basic force threshold value according to the tissue type of a to-be-operated site; calculating an intraoperative tissue real-time deformation rate based on the intraoperative view image, and calculating a real-time force safety threshold according to a preset basic force threshold and the tissue real-time deformation rate; receiving real-time contact force of the instrument and the tissue, comparing the real-time contact force with a real-time force safety threshold value, and if the real-time contact force is smaller than or equal to the real-time force safety threshold value, outputting an instruction of damping force in direct proportion to the real-time contact force; if the real-time contact force is larger than the real-time force safety threshold value, an emergency braking program instruction is output. According to the method, factors, such as tissue deformation and illumination change, which cause instability of the surgical field of view in the surgical environment are introduced, so that the environmental adaptability and dynamic adjustment of the field of view mechanism in the robot-assisted surgical operation process are improved.

Provided is a composition for visual field defect disorders, glaucoma, light-induced ocular tissue damage and related disorders, which can be used as a food or drug for long-term administration, prevention, symptom relief and improvement. A composition comprising a triglyceride represented by the formula (I):(wherein R1, R2, and R3 are each a saturated fatty acid residue, and at least one of them is a pentadecanoic acid residue) as an active ingredient.

Provided are an information processing method and the like that appropriately associate an image captured by an image acquisition catheter with an image captured by angiography even for a bent blood vessel.　The information processing method causes a computer to execute a process for: acquiring cross-sectional image information related to a plurality of cross-sectional images (71) of a blood vessel; acquiring, in perspective images (61), sensor position information related to the positions of a sensor used for capturing the respective cross-sectional images (71); acquiring designation of the visual field direction; and outputting either the shape of the blood vessel seen through in the acquired visual field direction or the angle relating to the visual field direction on the basis of the cross-sectional image information and the sensor position information.

The utility model relates to the technical field of glasses, in particular to a pair of virtual simulation glasses capable of being used for ciliary muscle detection, which comprises a glasses main body, the glasses main body is provided with a detection mechanism, the detection mechanism comprises an infrared imaging module and a miniature probe, the infrared imaging module and the miniature probe are connected with a nose pad, the glasses main body is provided with a warning mechanism, and the infrared imaging module and the miniature probe are connected with the nose pad. The warning mechanism comprises an LED, a vibration motor and an electrode patch, health detection is conducted on ciliary muscles through the miniature probe and the infrared imaging module which are arranged on the nose pad, the warning mechanism conducts vibration prompting on a patient according to the result of the detection mechanism, the patient is reminded that the patient is in the overuse fatigue state at present, and through low-frequency pulses released by the electrode patch, the patient is reminded to be in the overuse fatigue state at present. Through the lens adjusting mechanism, the diameter of the lens can be increased, the visual field range can be expanded, and the immersion feeling is enhanced; and the diameter can be reduced, the definition of a central area is improved, edge distortion is reduced, and the method is suitable for occasions requiring precise vision.

The invention relates to a blood vessel blocking hemostatic balloon capable of assisting suturing and a using method thereof, and relates to the field of medical instruments.The blood vessel blocking hemostatic balloon capable of assisting suturing comprises a sleeve, blocking balloons, hemostatic balloons, a flushing part and an inner tube, and the two blocking balloons with developing rings are bonded to the sleeve at intervals to block blood flow; a hemostasis balloon with a developing ring is distributed on the sleeve between the two blocking balloons to block the crevasse, and the flushing part is located on the sleeve between the hemostasis balloon and the blocking balloons so that sterile liquid can flow out to clean the crevasse. The inner tube is bonded in the sleeve so as to ventilate or inject developing liquid into the blocking balloon and the hemostasis balloon and inject sterile liquid into the flushing part, and the blood vessel suture device has the advantages that during a blood vessel suture operation, free blood vessels do not need to be fully dissected, blocking forceps do not need to be put down, and it can be guaranteed that damaged blood vessels are sutured under the condition of clear view.

The invention provides a glaucoma visual field progress prediction device and electronic equipment, and the method comprises the steps: obtaining a first original fundus image feature, a second original fundus image feature and primary clinical text data through preprocessing, and enabling the second original fundus image to be overturned relative to the first original fundus image; the twin bilateral difference network obtains bilateral blood vessel difference features of the first original eye fundus image features and the second original eye fundus image features, the bilateral blood vessel difference features and the first original image features are fused, and the text guide image feature enhancement module guides enhancement of image features output by the twin bilateral difference network through clinical text features. According to the glaucoma visual field progress prediction method and device, the trained prediction device is utilized to realize intelligent prediction of the glaucoma visual field progress, so that the problems of insufficient judgment accuracy, time consumption and low efficiency caused by dependence on subjective experience are avoided, and the prediction accuracy and timeliness are improved.

The innovative aspirator head comprises a tubular handle and a working head part arranged at the front end of the tubular handle, an aspiration channel is formed in the tubular handle, the working head part is an integrally formed flat wedge-shaped aspiration head, and the aspiration channel is communicated with the aspiration channel. At least one suction hole communicated with the suction channel is formed in the stripping working surface; in the whole stripping process, wound surface errhysis is continuously sucked away through the suction holes, it is ensured that the operation view is clear, and the flat wedge-shaped head cannot pierce lung tissue due to the large contact area and the small pressure intensity; meanwhile, the flat wedge-shaped head is easy to insert into a gap, the pure flat blunt end ensures that the front end cannot be punctured, the clinical pain point that a traditional round-head aspirator is easy to poke into or tear fragile lung tissue is effectively solved, stable poking and separation of a fiberboard are achieved by increasing the stress area, and the safety and controllability of an operation are remarkably improved.

The application discloses a thoracoscope smoke removal and field optimization device, which comprises a thoracoscope body, a central controller and a display screen. The front end of the thoracoscope body is provided with a multispectral smoke sensor, and a liquid variable-focus lens is arranged in the optical channel of the thoracoscope body. The central controller comprises a data acquisition module, a hardware compensation calculation module, an optical execution module, an image reverse reconstruction module and a field output module. Thus, the efficiency delay and operation interruption problems caused by the dependence on physical removal in the traditional technology are overcome. Through the dual mechanism of integrated hardware optical compensation and software image reconstruction, the optical scattering and depth of field defocus caused by smoke are directly offset within milliseconds, and the field quality fluctuation and operation pause caused by waiting for physical removal are avoided. Not only the continuous stability and high definition of the surgical field are maintained, but also the smoothness and safety of the surgical operation are ensured, and the interference on the pneumoperitoneum environment is reduced.

The invention relates to the crossing field of medical imaging and minimally invasive medicine, and discloses an endoscope-catheter cooperative control and anchoring optimization system which comprises an acquisition module used for continuously acquiring an image sequence through an endoscope and continuously acquiring a pose sequence of a catheter in the process of probing a target tissue through the endoscope and the catheter; the feature extraction module is used for performing feature extraction on the image sequence to obtain an image feature set corresponding to the image sequence, and performing feature extraction on the pose sequence to obtain a pose feature set of the catheter; the feature fusion module is used for fusing the image feature set and the pose feature set to obtain a feature fusion result; and the cooperative control module is used for determining a control signal based on the feature fusion result, and cooperatively controlling the anchoring posture of the catheter and the endoscope posture of the endoscope based on the control signal until the catheter is located in the visual field range of the endoscope. According to the scheme, the probability that the catheter is lost in endoscope view and accidentally hurts target tissue can be reduced.

The invention discloses a sclera jacking puncture locator. The sclera jacking puncture positioner comprises a handle and a tube body, the tube body comprises a first section and a second section, the first section is bent by 25-35 degrees relative to the second section, the end, away from the first section, of the second section is connected to the handle, and the end, away from the second section, of the first section is provided with a jacking head; the puncture needle is movably arranged in the tube body and can stretch out of or retract into the jacking head. The jacking head can jack the sclera, the puncture needle can stretch out of the jacking head to puncture the sclera, after puncture is completed, the puncture needle retracts into the jacking head, and the tube body is provided with the first section and the second section which are oppositely bent, so that the situation that the tube body shields the visual field of a microscope can be reduced, and non-blind area operation is achieved conveniently; according to the sclera jacking and puncturing positioner, jacking and positioning can be achieved, sclera puncturing operation can be conducted, non-blind area operation can be achieved during puncturing, and therefore the puncturing precision can be effectively improved, retina damage is avoided, and the risk of complications such as bleeding is reduced.

The present disclosure relates to a system 202 and a method 600 for detecting the visual field of eyes based on reflections on eyeglasses. The method 600 comprises receiving 602 image frames of a user from sensors and detecting 604 eye metrics of each eye. Furthermore, the method 600 comprises detecting 606 that the eyeglasses are being worn by the user, based on the receipt of one or more image frames, predicting 608 that reflections on the eyeglasses overlap with an area of ​​the at least one eye, and correlating 610 the eye metrics and the visual field of the at least one eye. The method 600 further comprises determining that a correlation value is below a predetermined range in order to send a warning signal to the user.Therefore, System 202 and Procedure 600 overcome the limitations of existing systems, which have problems due to hidden ocular metrics.

System and associated methods of use for rapid assessment of visual field integrity. In one embodiment, the device comprises a frame that rests near a patient's eyes with pinpoint lights or mechanical stimuli that act as visual stimuli mounted at locations within the frame and in the patient's peripheral visual field. A vantage point in front of the frame allows an operator to view the patient's eyes during assessment, enabling the operator to maximize the accuracy during both in person and telemedicine assessments. The lights or mechanical stimuli are positioned such that they are visible to patients with a wide range of interpupillary distances, enabling the use of a single-size device for all patients.

The invention discloses a three-dimensional vision field analysis method, device and equipment and a computer readable storage medium, and relates to the technical field of city design, and the three-dimensional vision field analysis method comprises the steps: constructing a three-dimensional model of a target region according to the region information of the target region; grid division is carried out on a view window where the three-dimensional model is located, and a plurality of viewport grid units are obtained; dynamically determining the proportion of each visual element in each viewport grid unit based on a preset element analysis algorithm; the element analysis algorithm is a ray detection algorithm or an image segmentation algorithm. According to the invention, the analysis efficiency of the element condition in the three-dimensional vision field can be improved, and the urban construction cost is reduced.

The invention discloses a pair of circle-of-vision far-end Panum myopia prevention and control glasses and a manufacturing method, and relates to the technical field of myopia prevention and control glasses. Comprising the following steps: carrying out adjustment function and phoria measurement on the comprehensive optometry unit; under the guidance of Sheard accurate measurement, near-end orientation determination of myopia measurement and a Panum fusion region is completed; aC / A measurement is carried out; performing binocular depth sense measurement based on the polarized light stereoscopic vision picture; measuring the myopia level and the adjusting intensity; quantifying a non-cross parallax position; determining a corresponding area boundary of the myopia prevention and control glasses; the non-cross parallax far-end position and the vision field circle position are the bottom edge thickness of the prism, and the Bernoulli myopia prevention and control glasses are customized according to the width of the fusion rupture point. According to the method, myopia prevention and control can be completed under the conditions that the reading amount is not reduced and outdoor activities are not demanded, the method is a practice process of a far-end effect of non-cross parallax in a Top-down visual process, and the degree reduction of the myopia can be really realized.

Provided is a visual field estimation apparatus using a machine learning model that has been machine-trained so that, with respect to a plurality of eyes to be examined, at least one of image information of retina and three-dimensional structure information of retina is acquired at each of a plurality of time points, visual field related information relating to a visual field of the eye to be examined is acquired at a corresponding time point, at least one of the image information of the retina and the three-dimensional structure information of the retina regarding each of the eyes to be examined is input to the machine learning model as input information, visual field change information representing change of the visual field and obtained based on the visual field related information at the plurality of time points with regard to the corresponding eye to be examine is used as training information, and visual field change information estimated on the basis of the input information is output from the machine learning model.

The invention provides a method and system for cooperatively simulating the visual state of a patient with impaired visual field by using AR, and belongs to the technical field of visual state simulation, the method is applied to a server side, the server side is connected with AR equipment worn by the patient with impaired visual field, and the method comprises the following steps: acquiring visual field meter inspection data of the patient with impaired visual field; determining view defect area features of the view impaired patient based on the view meter inspection data; remapping the visual field defect area features to a visual field picture of the visual field impaired patient so as to simulate the visual state of the visual field impaired patient; wherein the view image is acquired by the AR equipment. By adopting the technical scheme of the invention, the visual states of different visual field impaired patients can be accurately simulated.

The invention discloses an ophthalmology intelligent auxiliary diagnosis method and system based on heterogeneous data collaboration, and the method comprises the steps: synchronously obtaining an ophthalmology multi-mode heterogeneous data set of a patient, including an OCT image, a fundus photograph and a visual field inspection report; the OCT image is subjected to retina layered structure segmentation, and an RNFL thickness distribution diagram is extracted; performing optic disc region positioning and blood vessel tree segmentation on the fundus photography to generate a CDR and a blood vessel curvature quantized value; mode deviation probability graph coding is carried out on the visual field inspection report, and a quadrant sensitivity missing matrix is output; an ophthalmic multimodal heterogeneous data set is associated through a patient unique identifier, and a RNFL thickness distribution map of OCT is mapped to an optic disc coordinate system of fundus photography by using feature-driven non-rigid registration. According to the invention, an ophthalmology multi-modal data cooperation barrier is broken through, an intelligent decision-making system with structure-function mutual verification is constructed, and the diagnosis reliability and clinical interpretability are significantly improved.

The application provides a first-person visual angle auxiliary perception method for people with visual field defects, and relates to the technical field of visual technology.The application realizes automatic recording and auxiliary perception of target objects based on initial calibration and recording habits of users, and comprises the following steps: initialization calibration, user habit learning, multi-modal data acquisition, automatic recording and auxiliary perception.The method combines personalized needs of users and characteristics of visual field defects, and improves the perception efficiency and integrity of target objects for people with visual field defects through active learning and automatic recording.

To provide a visual field evaluation instrument that can realize visual field evaluation in a location where the use of electronic devices is restricted. [Solution] Visual field assessment device 1 is an instrument used to assess a user's visual field, and is characterized by comprising a head fixing part 2 fixed to the user's head, a transparent base 3 supported by head fixing part 2 and positioned in front of the user's eyes, and an effective visual field display part 4 that non-electronically displays the user's effective visual field on transparent base 3. Visual field assessment device 1 may also comprise a detachable fixing part 6 that detachably fixes transparent base 3 to head fixing part 2.

The application discloses an endoscope transparent cap with an auxiliary structure and an endoscope with the transparent cap. The transparent cap comprises a cap body, a proximal end of the cap body is used for sleeving on the endoscope, and a distal end of the cap body is used for abutting against tissue to form a fulcrum. A main working channel is arranged through the cap body along an axial direction of the cap body and is used for passing through a surgical instrument. An auxiliary structure body is arranged on an outer surface of a side wall of the cap body. An electrode needle auxiliary channel is formed in the auxiliary structure body and is independent of the main working channel and extends along the axial direction of the cap body. The electrode needle auxiliary channel is used for guiding an electrode needle to pass through. In the above manner, the electrode needle auxiliary channel which is physically separated from the main working channel can realize synchronous visual operation of double instruments, can stabilize the fulcrum and actively separate tissue, effectively expands a visual field and an operation space, is perfectly compatible with the existing endoscope, and significantly improves surgical accuracy and safety.

The present application relates to the technical field of exposure machine, especially to a projection visual field shielding device and a shielding method thereof, comprising a machine shell, a main light shielding plate, a rotating mechanism, a secondary light shielding plate and a translation mechanism, the machine shell is provided with a projection visual field area, the main light shielding plate is arranged in a fan shape, the rotating mechanism comprises a rotating ring, a first coil, a first magnet and a ball seat, the translation mechanism comprises a guide rail, a sliding block, a second coil and a second magnet, the secondary light shielding plate is arranged in a rectangular shape, the projection visual field area can be completely exposed and completely shielded, the main light shielding plate preliminarily shields the projection visual field area, forming an irregular visual field shape, the secondary light shielding plate is used for trimming the irregular visual field shape, the movement of the main light shielding plate and the movement of the secondary light shielding plate are independent and do not interfere with each other, the structure is simple, the control precision requirement of the main light shielding plate is low, the secondary light shielding plate can be arranged in a small area, the space occupation is reduced, the weight is light, and high-precision control is facilitated.

The invention belongs to the technical field of medical equipment, and particularly relates to gradient out-of-focus hyperopia correction glasses and a design method thereof.The gradient out-of-focus hyperopia correction glasses are each provided with a lens structure with three functional partitions, each lens structure comprises a base lens, and the central portion of each base lens is a central correction area; the annular transition stimulation area is located outside the central correction area, and the peripheral strengthening area is located on the outer side of the transition stimulation area. The design of the gradual-change hyperopia defocusing amount conforms to the effect that the hyperopia defocusing amount is increased in a stepped mode due to the fact that the retina form is transited to the peripheral retina from the macular area, and the good vision correction and hyperopia treatment effects are achieved, it is guaranteed that a clear object image is formed in the central area, and amblyopia training of a patient is not affected; a relatively clear central side view field range is provided, and the visual quality is ensured; peripheral retina hyperopia defocus is formed, and eye axis growth and hyperopia degree reduction are promoted.

Systems for customized visual field (VF) testing use machine learning models (15) trained on retinal images (12A, 12C, 12D) including optical coherence tomography (OCT), optical coherence tomography angiography (OCTA), fundus, and / or fluorescein angiography images. In operation, when a particular VF test (13) is to be prepared for a patient, a retinal image of the patient is submitted to the current machine model, which responds by synthesizing a VF for the patient. The synthesized VF can be used to optimize the particular VF test prior to performing the particular VF test on the patient.

The utility model discloses a ureteral flexible mirror belongs to medical instrument technical field, including handle shell, one end of handle shell is rotatively connected with joint, the outside fixed connection of joint has mirror body sleeve, the other end fixed connection of handle shell has first channel pipe, the end of first channel pipe is communicated with first sheath pipe channel, first sheath pipe channel sets up inside handle shell, the inside fixed connection of handle shell has connecting block, and one end of first sheath pipe channel is inserted in the inside of connecting block, the utility model discloses a first channel pipe and second channel pipe are set up, better satisfy clinical treatment demand, when perfusion physiological saline maintains clear vision and operation space, another channel carries out operation, guarantees operation visual field clear, avoids the tissue damage because of visual field fuzzy, improves the operation convenience, solved the single problem of existing ureteral flexible mirror working channel.

The present invention relates to a method for diagnosing an ocular disease from a fundus image. The method for diagnosing an ocular disease from a fundus image, according to an embodiment of the present invention, comprises: a step A of extracting a grayscale map from a static field of view report by using template matching; a step B of generating a pair of images by mapping a patient's fundus image and the grayscale map, the patient's fundus image having the same examination date and the same eye position; and a step C of training a visual field prediction model by using the generated pair of images.

The utility model discloses a gradient microstructure optical lens adapted to a simulated outdoor environment, which comprises a substrate and a microstructure layer, the microstructure layer comprises a lower high-density area, a middle transition area and an upper low-density area, the microstructure layer is provided with a plurality of uniformly distributed microstructures, and the microstructures are arranged on the substrate. The density of the microstructures is gradually reduced from the lower part to the upper part along the vertical direction of the lens, and the gradient change range of the density of the microstructures is that 2-5 microstructures are reduced per millimeter. According to the gradient microstructure optical lens adaptive to the simulated outdoor environment, targeted anti-dazzle is achieved, and the dense microstructures on the lower portion effectively restrain ground reflection light which accounts for more than 60% of an outdoor dazzle source; visual field definition optimization: the upper sparse arrangement reduces interference to a long-distance visual field; and ergonomic adaptation: the visual behavior characteristic that the downward watching proportion of human eyes is 70% during outdoor activities is met.

The invention relates to a visual field intensity modeling and parameter optimization method based on a directional glancing eye movement task, and the method comprises the steps: carrying out the parameterization design and data collection of the directional glancing task, constructing a visual field intensity model covering the three stages of central fixation, green spot glancing and red spot maintenance, carrying out the back-stepping of an individual visual field parameter based on maximum likelihood estimation, and carrying out the optimization of the visual field intensity. And performing distribution modeling and type division on multiple tested parameters, and optimizing task parameters through simulation and discrimination performance. According to the method, a unified space-time visual field intensity model is established, fine splitting of different cognitive mechanisms is realized, a task parameter optimization closed loop of simulation-backstepping-evaluation-screening is constructed, the distinguishing efficiency of different visual fields and execution control subtypes is remarkably improved, and the method has the advantages of being high in robustness and high in robustness. The method overcomes the defects of dependence on empirical parameters, insufficient cognitive interpretation and low crowd discrimination in the prior art, and can be used for quantitative evaluation and targeted task design of visual attention and eye movement control functions.

This invention discloses a closed-loop control method and device for intraoperative bleeding detection, localization, and autonomous hemostasis in robot-assisted surgery. The method includes acquiring intraoperative binocular images and depth information; identifying the surgical stage in the binocular images to constrain the bleeding detection range; segmenting surgical elements in the binocular images to obtain segmentation masks for tissues, instruments, and blood; fusing the segmentation masks and depth information to extract three-dimensional features of suspected bleeding areas and determining bleeding events based on relevant trends; determining the three-dimensional coordinates of the bleeding point and converting them to three-dimensional coordinates in the robotic arm coordinate system; and generating a target trajectory and hemostasis control commands based on these three-dimensional coordinates to drive the robotic arm to perform autonomous hemostasis. This invention, through integrated closed-loop control, achieves early and accurate identification and rapid autonomous intervention for intraoperative bleeding, effectively reducing the risk of visual field contamination without human intervention, and significantly improving the safety and timeliness of clinical treatment in robotic surgery.