270 results about "Visual field loss" patented technology

The invention discloses a tunnel entrance dynamic light and signal control system based on a visual algorithm, relates to the technical field of intelligent manufacturing control, and is used for solving the problem of poor light control when the visual field of a tunnel entrance suddenly changes. According to the method, a dynamic sensing mechanism based on visual feature understanding and multi-strategy linkage is constructed, continuous monitoring and intelligent control over the driving visual adaptation state of the tunnel portal are achieved, multi-dimensional visual features are extracted through image collection and preprocessing, visual risk scores are generated, visual field sudden change and traffic abnormity are recognized in combination with a sliding window, and the driving visual adaptation state of the tunnel portal is obtained. A risk response instruction is output, illumination adjustment and signal linkage control are driven, then vehicle behavior continuity, parking probability and blind area shielding factors are fused, speed limiting, guiding or warning signals are dynamically issued, and visual model fine adjustment and strategy updating are performed based on execution feedback. And finally, illumination and signal adaptive optimization under cross-time and multi-environment conditions is realized in combination with a control scene library, and the traffic safety and control intelligence level are improved.

The invention provides a blood cell image recognition method based on a multi-scale Vision Transform model, and the method comprises the steps: constructing a multi-scale feature extraction architecture, combining the global modeling capability of a Transform network, carrying out the parallel processing of Patches of different sizes, and fusing the multi-scale information, thereby achieving the recognition of a blood cell image. The cells in the blood smear can be comprehensively perceived from microscopic details to macroscopic contexts, so that not only is the adaptability of the model to cell size difference and morphological diversity enhanced, but also the recognition stability under the conditions of cell overlapping and dyeing difference in a complex visual field is improved; the accuracy and calculation efficiency of cell classification and counting are effectively improved, and full-process automation from visual field quality evaluation to automatic cell recognition and counting is achieved.

A brain organoid containing optic vesicles generated based on H9 induction and an eye-brain fusion culture method thereof are provided. H9 embryonic stem cell induction is used to generate a brain organoid containing optic vesicles with primitive visual field. Based on an established optic vesicle brain organoid culture system, microscopic imaging is combined with specific marker antibodies related to early retinal development and photoreceptor cell maturation to structurally and functionally identify the brain organoid containing optic vesicles.

The invention discloses a calibration board and wind tunnel feature point-based binocular system wind tunnel coordinate system calibration method, and belongs to the field of aerodynamic tests. Comprising the following steps: reconstructing surface mark points of a calibration plate by photogrammetry outside a hole and establishing a local coordinate system to obtain coordinates under the local coordinate system; a binocular system is arranged in the hole, and binocular internal and external parameters are calibrated through a special cross calibration ruler; arranging a plurality of circular feature mark points on the surface of the hole wall with overlapped visual fields of the binocular system; the calibration plate is correctly placed according to the geometrical relationship, so that each vector of the local coordinate system is parallel or perpendicular to an incoming vector, and the binocular system reconstructs global points of the calibration plate and registers the global points to achieve alignment of a measurement coordinate system of the binocular system and a wind tunnel coordinate system; reconstructing a three-dimensional coordinate of the fixed point in a wind tunnel coordinate system through a binocular system; and in a subsequent test, adopting resection to realize the recalibration of the wind tunnel coordinate system. According to the invention, high-precision and high-efficiency alignment requirements of a measurement coordinate system and a wind tunnel coordinate system of a binocular system can be met.

The invention belongs to the field of passenger car blind area early warning, and particularly discloses a passenger car blind area early warning method, system and device and a storage medium, a visual field missing area caused by vehicle body posture change is recognized by comparing visual field coverage areas of a vehicle under a straight-going working condition and a turning working condition, a dynamic blind area can be accurately recognized, and the passenger car blind area early warning efficiency is improved. The problem of blind area omission caused by static modeling is avoided, the comprehensiveness and accuracy of blind area recognition are ensured, and meanwhile, when the visual field missing area is recognized, real-time recognition and motion trail capture of a dynamic target are carried out in an adjacent visible area focused on the periphery of the visual field missing area. And early warning information is generated in time based on potential conflict analysis between the captured target movement track and the vehicle driving track, so that the early-stage discovery capability of potential conflicts is improved, a driver has more time to take danger avoiding measures, traffic accidents caused by blind areas are effectively prevented, and the safety of pedestrians, non-motor vehicles and other vehicles is guaranteed.

The invention relates to the technical field of intelligent visual detection, in particular to visual field detection equipment, system and method based on extended reality (XR), and the method comprises the steps that an image feature extraction module collects image data in real time, extracts features and eliminates optical distortion; the fixation deviation correction module analyzes eye movement data in real time, quantifies fixation deviation and triggers visual prompt and correction; the adaptive stimulation generation module dynamically encrypts to generate a test point image and adaptively adjusts the test point image according to visual field analysis and test requirements; the dynamic adjustment image module predicts and optimizes a test point presentation sequence according to image features and fixation points, automatically encrypts a high-probability defect area and quickly jumps to a key screening area; and the visual field defect identification module extracts image features, calculates the defect probability of each region in real time by using a Bayesian network in combination with subject response data, and locates a high-risk region. The system provides an efficient and accurate visual field detection scheme through the synergistic effect of multiple modules.

Described herein is a chin rest apparatus for a visual field system. The chin rest apparatus can include a base and at least one chin rest insert moveably coupled to the base and configured to be adjusted to one of a plurality of head turn angles and one of a plurality of head tilt angles. The plurality of head turn angles and plurality of head tilt angles can be associated with obtaining a visual field of a subject in the visual field system.

The invention discloses a visual monitoring method assisted by an AI image recognition algorithm in a transparent working sleeve under a spine endoscope, and relates to the technical field of medical instruments, and the method comprises the following steps: collecting a torque waveform, a perfusion pressure signal and a cavity pressure signal under a unified event time base line, constructing a resonance frequency band spectrum, and obtaining a resonance frequency band spectrum; calculating a resonance pressure index and extracting a phase evolution trajectory for liquid level distortion reconstruction; and under the constraint of the resonance pressure index and the phase evolution trajectory, recovering the liquid level phase, reconstructing a lens phase field in front of the camera, calculating a view distortion gradient, and determining a liquid level dynamic distortion core area. According to the method, a resonance dynamic map is constructed through multi-source data fusion, a liquid level potential field is reconstructed, a visual field distortion area is locked, artifacts are eliminated in combination with image feature recognition, perfusion control is reversely driven based on a reliable visual field state, and a closed-loop regulation and control strategy with time reversal gating and self-adaptive updating capacity is formed. And stable and intelligent control of the visual field in the operation is realized.

The invention relates to a visual training method, device and equipment based on a dynamic view field, and the method comprises the steps: obtaining detection data and a training time threshold value of a to-be-trained user, and the detection data comprises long-distance data, short-distance data and measurement precision; detecting the to-be-trained user according to the detection data to obtain vision data before training; determining training data according to the vision data; and according to the training data, carrying out distant view field and near view field alternate cycle training on the to-be-trained user until the duration reaches a training duration threshold, and completing visual training on the to-be-trained user. According to the visual training method based on the dynamic view field, vision data detected by a to-be-trained user is obtained to determine training data, and then the to-be-trained user is subjected to far view field and near view field alternate cycle training according to the training data and a training duration threshold value, so that the eyes of the to-be-trained user really move in the training process; therefore, the training effects of eye fusion image and focusing and diverging function adjustment are obviously improved.

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.

The invention relates to a real-time eye identification and visual detection process control method, which comprises the following steps of: applying bitamporal edge disturbance stimulation in a visual field, inducing spontaneous dominant reaction of a dominant eye of a user, collecting perceptual response difference of a non-gazing area to the disturbance stimulation, and judging the current dominant state of the dominant eye; on the basis of micro-differential pressure distribution of different quadrant areas of eye sockets, speculating a visual attention gravity center in real time, and executing spatial geometric deformation on an ROI (Region of Interest) in a visual detection process, so that a detection area dynamically adapts to a gaze offset trend of a user; the method comprises the following steps: respectively constructing two physically independent visual detection links of a feature target strong discrimination process driven by a main visual eye and an environment contour weak confirmation process driven by an auxiliary visual eye, introducing a logic thermal impedance adjustment mechanism, and setting a buffer time window to absorb processing fluctuation caused by state switching; and dynamically matching a visual detection flow path by constructing a mapping relationship between the eye dominant frequency and the user intention type on the basis of statistical information of the dominant eye identification frequency.

Disclosed techniques evaluate the visual field of a patient's eye using deep learning techniques. A computer system obtains a plurality of cross-sectional scan images of a retina captured by an optical coherence tomography (OCT) device. The retina has an inner retinal layer. A retinal optical texture analysis (ROTA) map of the inner retinal layer is generated from the plurality of cross-sectional scan images. The ROTA map includes a plurality of pixels, and each pixel of the ROTA map corresponds to a respective optical texture signature value S providing information about tissue composition and optical density of the inner retinal layer at a respective retinal location. The computer system applies a machine learning model to process the ROTA map of the inner retinal layer to determine visual field sensitivity of the retina.

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.

A binocular visual field (VF) testing system and a method employing spherical (non-Euclidean) geometric modeling and eye-tracking technology to generate cyclopean visual field maps are disclosed. The system projects dichoptic stimuli to each eye independently at controlled fixation distances and dynamically records vergence responses using eye tracking. A non-Euclidean spatial encoding model based on logarithmic spirals and Jacobian analysis is applied to the resulting binocular data, enabling three-dimensional topographic field mapping. This approach extends traditional monocular field testing by accounting for retinal curvature, binocular integration, and fixation depth effects, resulting in volumetric visual field models more representative of real-world spatial perception. The system includes hardware (BINOSCOPE) and software modules that implement real-time depth encoding, topological mapping, and boundary detection of peripheral visual fields.

The application discloses a kind of big visual field image side telecentric underwater visual docking imaging optical systems, the optical system includes in sequence: spherical cover window, front group lens, variable diaphragm, rear group lens and filter;Front group lens includes in sequence: front group first lens, front group second lens, front group third lens, front group fourth lens;Rear group lens includes in sequence: rear group first lens, rear group second lens, rear group third lens, rear group fourth lens;Variable diaphragm is located between front group fourth lens and rear group first lens;Object side imaging light beam is imaged on strobe camera target surface in sequence through spherical cover window, front group lens, variable diaphragm, rear group lens and filter.The application has big visual field, short focal length, variable F number and image side telecentricity and the like characteristics, clear imaging is realized by rear group focusing and variable F number, can be used for the close-range underwater visual docking recovery of cross-domain aircraft, ensure that imaging is clear during docking process, and the position solution error caused by image side focusing can be eliminated.

The utility model relates to the technical field of medical instruments, and discloses a laparoscope intestine pressing clamp which comprises a hollow pipe, the right end of the hollow pipe is fixedly connected with a grab handle, the outer wall of the hollow pipe is provided with a second sliding groove, the inner wall of the second sliding groove is connected with a limiting block in a sliding mode, and the outer wall of the limiting block is provided with an adjusting sleeve. And the inner wall of the adjusting sleeve is slidably connected with the outer wall of a limiting block, the bottom side of the limiting block is fixedly connected with a second limiting ring, the left side of the second limiting ring is fixedly connected with a second spring, and the inner wall of the second limiting ring is slidably connected with a guide rod. According to the utility model, by rotating the pull disc, the guide rod is pulled to enable the limiting ring I to extrude the spring II, and the position of the limiting ring II is adjusted by rotating the adjusting sleeve, so that the pressing forceps are opened, the purposes of exposing the rectum posterior clearance and the rectum anastomotic stoma and giving the visual field to a surgeon for suturing are achieved, the working efficiency is improved, and the operation time is shortened; the labor cost is reduced.

The present invention provides a camera comprising: a body supported on a carrier; the transparent cover is arranged at the bottom of the body through a base, and the transparent cover and the body are spliced to form a closed containing cavity; the lens assembly is arranged in the transparent cover so as to shoot through the transparent cover; wherein the transparent cover comprises a first transparent cover and a second transparent cover which are mutually spliced to form a sphere, the first transparent cover is hemispherical, the second transparent cover is arranged on the body through the base, a first included angle is formed between a splicing seam of the first transparent cover and the second transparent cover and the horizontal direction, and a second included angle is formed between the splicing seam of the first transparent cover and the second transparent cover and the horizontal direction. Therefore, the first transparent cover covers the visual field range of the lens assembly.

The application discloses a single-hole laparoscopic cholecystectomy method and relates to the technical field of laparoscopy application, S1: a patient is given general anesthesia by air insertion, a belly navel turning-over technique is used to establish an operation hole at the navel, and a single-port multi-channel puncture device is arranged; S2: a 30-degree straight laparoscope lens, a curved blood vessel clamp, a non-injury grabbing clamp, an ultrasonic knife, an electric coagulation hook and other conventional surgical instruments used in multi-hole laparoscopic cholecystectomy are used, a Cross Hand method is adopted to enter the surgical instrument, the bottom of a gallbladder is lifted by the non-injury grabbing clamp, and a gallbladder triangle is exposed. If the gallbladder triangle is shielded by liver Ⅲ or Ⅳb in this step, the visual field cannot be completely exposed, and a liver traction device needs to be used to assist in exposing the visual field of the gallbladder triangle. The application always keeps the same traction force on the liver, avoids the problem that the traction force of the liver is insufficient to cause unclear visual field with the cutting of the gallbladder being deepened, better exposes the surgical visual field of the gallbladder triangle, reduces the operation time and improves the operation safety.

The utility model relates to a height increasing device for a measuring instrument. At present, under the conditions that the environment is limited, the sight line height is not enough, the gradient is large, the sight line is close to an obstacle and the like, a target cannot be effectively observed by using the height of a conventional measurement tripod, and the accuracy and authenticity of measurement data cannot be ensured even if the target can be observed. The supporting and fixing device comprises a plurality of supporting and fixing main rods, a plurality of fixing connecting pieces and a plurality of telescopic connecting rods. The supporting and fixing main rods are arranged in a triangular mode, the fixing connecting pieces are arranged in the middles of the supporting and fixing main rods respectively, the telescopic connecting rods are arranged between the adjacent supporting and fixing main rods respectively, and the two ends of each telescopic connecting rod are connected with the fixing connecting pieces through fixing pieces respectively. The top end of the supporting and fixing main rod is provided with a supporting and fixing part capable of supporting the bottom of the measuring tripod. The height of the measuring foot stool can be increased, the visual field of target measurement is expanded, target identification is more accurate, the authenticity and the accuracy of measured data are improved, and therefore the measuring efficiency is greatly improved.

A system may include a headset device comprising a display screen and an adaptive map perimetry algorithm that is configured to access or implement a normative database or model. The system may implement a VF test adapted to fit an area of the display screen based on values in the normative database or model and is rendered as a same or similar visualization compared to one or more different headset devices having different display screens having different respective shapes, formats, sizes, and / or resolutions. The system may receive visual test data indicating a visual field of the user and detect one or more initial test locations. The one or more initial test locations define one or more healthy clusters indicative of an absence of scatoma and one or more damaged clusters indicative of scotoma. The system may generate a spatial mapping identifying locations of the one or more damaged clusters.

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.

To provide a new technique to image or measure an eye to be examined at a wide angle while appropriately performing positioning between an apparatus optical system and the eye to be examined.SOLUTION: An ophthalmologic apparatus includes an objective optical system, an illumination optical system, an imaging optical system, an imaging unit, a moving mechanism, and a three-dimensional position specification unit. The objective optical system optically relays a measurement position where the pupil of the eye of a subject can be arranged. The illumination optical system irradiates the eye with illumination light through the objective optical system. The imaging optical system is configured to receive return light of the illumination light from the eye through the objective optical system. The imaging unit includes two or more cameras arranged so that a position substantially optically conjugate with the measurement position relayed by the objective optical system is included in a visual field. The moving mechanism moves the objective optical system, the illumination optical system, the imaging optical system, and the imaging unit relative to the eye. The three-dimensional position specification unit determines a three-dimensional position of the eye on the basis of two or more captured images of the eye obtained by the imaging unit.SELECTED DRAWING: Figure 1

The invention discloses a visible drag hook for mandibular angle plastic surgery, relates to the technical field of drag hooks for mandibular angle plastic surgery, and solves the problems that an existing drag hook only adopts a lamplight illumination mode to light an operation part of a patient, then a blind area exists in the operation part, a doctor who operates a knife cannot observe the position of the blind area through sight, and the operation difficulty is high. The surgical retractor comprises a rod body, a ring body is fixedly mounted at the lower end of the rod body, a pair of handles is fixedly mounted at the lower end of the ring body, and a retractor plate is fixedly mounted at the upper end of the rod body. Through video recording of a pinhole camera, an image of an operation position is presented on an external display, then a good visual field is provided for a doctor, the total length of an extension plate and a retractor plate is adjusted through an adjusting assembly, and hooking and pulling of the side walls of different oral cavities with different lengths are facilitated.

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.