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41 results about "Eye chart" patented technology
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An eye chart is a chart used to measure visual acuity. Eye charts are often used by health care professionals, such as optometrists, physicians or nurses, to screen persons for vision impairment. Ophthalmologists, physicians who specialize in the eye, also use eye charts to monitor the visual acuity of their patients in response to various therapies such as medications or surgery.
Anti-memorizing logarithmic visual chart
Owner:ZHANGJIAGANG XINFEI MEDICAL EQUIPMENT CO LTD
Ophthalmologic apparatus and visual target presenting device
An ophthalmologic apparatus includes a first visual target presenting unit that presents a first eye chart including a visual target, at a first examination distance, to an examinee's eye of which a trial lens is disposed ahead, and a second visual target presenting unit that presents a second eye chart including a visual target, at a second examination distance different from the first examination distance, wherein the first eye chart and the second eye chart are presented adjacently in plan view in a presentation region in which no influence of aberration of the trial lens is present, within a range viewable by the examinee's eye through the trial lens.
Owner:TOPCON CORPORATION
Synchronous mirror image control vision examination auxiliary system for infrared remote control visual chart
The invention discloses an infrared remote control visual chart-oriented synchronous mirror image control vision examination auxiliary system, which comprises an infrared receiving and transmitting device and a PC terminal, the infrared receiving and transmitting device comprises a development board, an infrared receiving module and an infrared transmitting module, and the PC terminal comprises a PC and is equipped with a bar code or two-dimensional code scanning gun and a bar code thermal printer. The PC is connected to an internal network and is connected with the development board; a signal pin of the infrared receiving module is connected with a digital pin D3 of the development board, a signal pin of the infrared transmitting module is connected with a digital pin D2 of the development board, and power supply pins of the infrared receiving module and the infrared transmitting module are respectively connected with a 5V pin and a GND pin of the development board; coding analysis software for infrared remote control of the visual chart and synchronous mirror image software for the infrared remote control visual chart are written in the PC, an infrared signal analysis database is established through the coding analysis software, and the software receives and sends infrared coding data through a COM port and an infrared receiving and emitting device.
Owner:MINGDE DOCTOR GROUP (SHENZHEN) CO LTD
Vision detection device
The invention relates to the technical field of vision detection equipment, in particular to a vision detection device. The internal projection device comprises a display assembly used for projecting a visual chart, an imaging support movably connected with the display assembly, an internal projection base arranged below the imaging support and used for being matched with the display assembly, a driving assembly used for changing the projection angle of the display assembly and a connecting rod assembly. And the imaging bracket is internally and movably connected with a rotary reflector assembly which is matched with the inner projection base and is used for changing a projection light path of the display assembly. The method has the advantages that the problem that the visual function detection equipment is difficult to efficiently switch the detection state in the same scene is solved, and the flexibility of the detection equipment is improved.
Owner:NINGBO MING SING OPTICAL R & D
Trajectory analysis method, device and storage medium based on self-test vision chart
The present invention relates to the technical field of eye chart trajectory generation, and specifically discloses a trajectory analysis method, device, and storage medium based on a self-test eye chart. The method comprises: determining a trainable range on the self-test eye chart based on a user's vision data; generating a training trajectory on the self-test eye chart based on the trainable range; controlling the self-test eye chart to perform a corresponding sight mark indication action based on a preset training time and the training trajectory; obtaining training feedback information from the user regarding the sight mark indication action; and storing the training feedback information. By determining the trainable range based on the user's vision data, a personalized training plan can be formulated based on each user's actual vision condition, making the training more targeted and improving the training effect.
Owner:SICHUAN HEALTHSUN VISION PHARMA TECH DEV CO LTD
Eye chart projector
1. The name of this design product: Eye chart projector. 2. Purpose of this design product: This design product is used for vision testing or screening of the eyes. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the key points of the design: Design 1 Stereoscopic Drawing 1. 5. Designate Design 1 as the base design.
Owner:ZHEJIANG MUCHANG MEDICAL TECHNOLOGY CO LTD
Fast calibration of gaze tracking method
ActiveCN117218701BCharacter and pattern recognitionBiological modelsComputer graphics (images)Radiology
The application discloses a kind of fast calibration sight line tracking methods, comprising: by accessing camera, extract each frame image in real-time video, obtain the image of face area;Image pre-processing module is used to the image pre-processing of obtained picture, and the pupil center point coordinate is obtained;Diagonal line two-point calibration is used, and the functional relationship between screen diagonal line L and the w and h of screen is constructed;Calibration module is set to be able to immediately enter standby calibration state when camera continuous multiple frames are not detected face, and after detecting face again, it will immediately start calibration module and carry out human eye calibration work;The mapping function between the center point of the center point between the pupils of two eyes and computer cursor is constructed by the eye chart data obtained in calibration work process, and then the eye chart data of any moment is substituted into mapping function, and the gaze point coordinate on screen at this moment can be obtained and mouse movement and single-click operation are controlled.The sight line tracking method calibration speed is fast, and time is saved.
Owner:AVIC EAST CHINA OPTOELECTRONICS CO LTD
Liftable visual chart
The utility model discloses a liftable visual chart which comprises a reverse plate, one side of the reverse plate is rotatably connected with a fixed base, two ends of the fixed base are provided with fixing lugs, a sliding block is arranged in the fixed base, the side edge of the fixed base is provided with a locking pulley, two sides of the locking pulley are provided with sliding grooves, and the locking pulley is provided with a sliding groove. A stopping block is connected to the sliding groove in a sliding manner; the visual chart can be hidden behind the decorative picture through the reversing plate and the fixed base and displayed when vision detection is needed, the attractiveness in families is improved, the height of the visual chart can be adjusted through the sliding block, and the visual chart is suitable for family members of different heights and universal.
Owner:SHENGJUE (SHANGHAI) TECH CO LTD
Intelligent vision detection method and system based on noninvasive brain-computer interface technology
The invention discloses an intelligent vision detection method and system based on a noninvasive brain-computer interface technology, and belongs to the field of medical diagnosis, and the system comprises a stimulation presentation module, a data acquisition module, a model building module and an online control module; the method comprises the steps that sighting marks of different sizes flicker at the frequency of 10 Hz to stimulate a visual system of a subject, a Neuroscan device is used for collecting electroencephalogram signals, after preprocessing such as filtering and artifact removal, frequency domain, time domain and time frequency features are extracted, and a three-level machine learning model is constructed; the offline experiment verifies the performance of the model, the online experiment collects data in real time through a TCP protocol and performs grading prediction, and a result is fed back to a display screen. According to the intelligent vision detection method and system based on the noninvasive brain-computer interface technology, subjective deviation of a traditional visual chart is avoided, the method and system are suitable for special crowds, an objective and dynamic new path is provided for vision detection, and research and development of portable intelligent equipment can be promoted.
Owner:TIANJIN UNIV
Movable vision detection equipment
The invention relates to the technical field of vision detection, in particular to movable vision detection equipment which comprises a detection mechanism and a remote controller used for controlling the detection mechanism, the detection mechanism comprises a flexible visual chart, a bottom box, a machine cover, a balance weight cylinder, a supporting assembly and a winding assembly, and the winding assembly is arranged in the bottom box. The upper end of the flexible visual chart is wound on the winding assembly, the lower end of the flexible visual chart penetrates through the bottom of the bottom box, the balance weight cylinder is connected to the lower end of the flexible visual chart, the supporting assembly is arranged on the rear sides of the two ends of the balance weight cylinder, the machine cover is buckled to the top of the bottom box, and the cleaning assembly is arranged in the machine cover and abuts against the flexible visual chart. The problems that in the prior art, vision detection equipment is not convenient to use and cannot meet the requirements of some patients who cannot leave the home or are inconvenient to go out, it is difficult to ensure that a visual chart is flatly and smoothly unfolded in the using process, stability and precision are low, the visual chart cannot be automatically cleaned, the workload of medical staff is easily increased, and the working efficiency is high are solved. And the working efficiency is poor.
Owner:JINAN PEOPLES HOSPITAL
Intelligent vision correction and management system
PendingCN120391990AEye exercisersCharacter and pattern recognitionVisual perceptionManagement system
The invention discloses an intelligent vision correction and management system, and relates to the technical field of vision training. The system comprises a vision detection unit, a rechecking unit, a correction training unit and a management unit, wherein the vision detection unit evaluates vision through a dynamic visual chart and gesture recognition; and the re-checking unit is combined with historical data to confirm the current vision level by an expert. The correction training unit adjusts and determines a new acousto-optic television force training scheme according to a confirmation result of an expert, and VR simulation, eye massage, ciliary muscle training and nursing light system assistance are combined. And the management unit is bound with a user account, visually displays vision changes and training schemes, and facilitates tracking and management. According to the invention, the vision detection efficiency can be improved, and the automation degree of vision training can be improved.
Owner:ZHEN VISION HEALTH IND TECH (WUHAN HUBEI) CO LTD
Ophthalmic treatment examination device and method
The present invention provides an ophthalmic treatment examination device and method, which relate to the field of vision examination technology, and include: a support unit, a controller, a power socket, a control button, a vision examination unit, a positioning unit and a control unit; the controller is installed on the rear side of the support unit; there are three control buttons, and the three control buttons are installed on the right side of the support unit, and the three control buttons are electrically connected to the controller; the vision examination units are provided in a row, and a row of vision examination units is installed on the support unit; the positioning unit is installed on the support unit, and the positioning unit is used to position the support unit; the control unit is installed on the support unit; the patient does not need to maintain a distance of about five meters from the eye chart, and is suitable for use in smaller clinics; it solves the problem that the patient generally needs to maintain a distance of about five meters from the eye chart, which is not suitable for use in smaller clinics.
Owner:THE SECOND XIANGYA HOSPITAL OF CENT SOUTH UNIV
Rapid children vision screening system and method based on Internet of Things
The invention belongs to the technical field of vision screening, and discloses a rapid children vision screening system and method based on the Internet of Things. The system comprises a screening terminal device, an Internet of Things communication device and a cloud server. The method comprises the following steps: collecting real-time basic information of a child, and uploading the real-time basic information to a cloud server; generating a real-time vision screening strategy according to the real-time basic information; according to a real-time vision screening strategy, selecting visual chart elements from a visual chart element library, generating a real-time visual chart page, and sending the real-time visual chart page to screening terminal equipment; visualizing the real-time visual chart page, collecting real-time interaction data of the child, and uploading the real-time interaction data to a cloud server; and according to the real-time vision screening strategy, analyzing the real-time interaction data to obtain a real-time vision screening analysis result, and sending the real-time vision screening analysis result to the screening terminal equipment. According to the invention, the problems of high hardware cost, low efficiency, poor effect, dependence on professionals and poor real-time performance in the prior art are solved.
Owner:BEIJING NUWA BUNIAN TECH INFORMATION TECH CO LTD
A subjective optometry prediction method combining wavefront aberration and optical signals
The present invention proposes a subjective optometry prediction method that combines wavefront aberration with optical signals. This method measures the wavefront aberration data of the eyeball through a wavefront sensor, obtains the biological parameters of the cornea, lens, and retina through multi-field scanning with a galvanometer system, and after screening high-credibility data points, uses the NURBS algorithm to construct a three-dimensional model of the eyeball with a gradient refractive index; optimizes the corneal stress distribution using finite element analysis, it iteratively corrects the model through deformation energy functions, and dynamically compensates for eye movement errors based on eye tracking data; generates multi-field angle vision chart images through ray tracing simulation, and predicts subjective optometry results in combination with an image quality assessment algorithm. The present invention integrates high-precision modeling, dynamic error suppression, and intelligent simulation technologies to significantly improve the accuracy, personalized adaptability, and dynamic scene adaptability of optometry predictions, providing an efficient and reliable solution for refractive correction.
Owner:HUNAN HUOYAN MEDICAL TECH CO LTD
Target presentation device
To provide a target presentation device capable of preventing a positional deviation of an eye to be examined in a space-saving and low-cost manner.SOLUTION: A target presentation device includes: a display device (distant target 41) that emits a target light flux; a target presentation window W; a target presentation optical system 5 that guides the target light flux emitted from the display device to the target presentation window W; a position acquisition unit (second imaging unit 62, position detection unit 73) that acquires the position of an eye E to be examined; a determination unit 74 that determines whether the eye E to be examined is included within an examination possible range R based on the position of the eye to be examined acquired by the position acquisition unit; and a display control unit 70 that switches the display device to an examination mode for emitting the target light flux when the determination unit 74 determines that the eye to be examined is included within the examination possible range, and switches the display device to a position adjustment mode for emitting a light flux of a notification image 76 representing a positional relationship between the eye E to be examined and the examination possible range R when the determination unit determines that the eye to be examined is not included within the examination possible range.SELECTED DRAWING: Figure 3
Owner:TOPCON CORPORATION
Visual training method and device based on self-test visual chart and storage medium
The invention relates to the technical field of visual training, and particularly discloses a visual training method and device based on a self-test visual chart and a storage medium, and the method comprises the steps: determining a trainable range on the self-test visual chart based on the visual data of a user; generating a training track on the self-test visual chart based on the trainable range; controlling the self-test visual chart to execute a corresponding sighting mark indication action based on preset training time and the training track; acquiring training feedback information of a user for the sighting mark indication action; and storing the training feedback information. The trainable range is determined based on the user vision data, and a personalized training scheme can be formulated according to the actual vision condition of each user, so that the training is more targeted, and the training effect is improved.
Owner:SICHUAN HEALTHSUN VISION PHARMA TECH DEV CO LTD
A deep learning-based VRAR binocular 3D target positioning method
The application discloses a VRAR binocular 3D target positioning method based on deep learning, which comprises the following steps: collecting an eye chart video of a human eye tracking interest point Pc variation, analyzing the state when the eyes are stable, and analyzing the time required for a position change of the eye tracking interest point; a binocular 3D positioning model is constructed, including a feature extraction model based on a pupil-corneal reflection vector method, a 3D positioning model and a feature fusion module; each small eye chart change video and various features are taken as input parameters, and the three-dimensional coordinates of the interest point are taken as output parameters, which are input into a position recognition model for training and learning to obtain a trained position recognition model which is used in the practical stage; then, the position recognition model is saved and updated to a data set and used as a personal data set of a user to improve the adaptability of the personal model to the user.
Owner:NANJING BOTUO VISION TECH CO LTD
A method and system for automatically generating variable distance correction results of an electronic vision chart
This application discloses an automatic generation method and system for variable distance correction results of electronic vision charts, relating to the field of electronic vision testing. The method includes: obtaining the target examination distance of the examinee and configuring a target examination distance mode based on the target examination distance; performing vision testing on the examinee according to the target examination distance mode to obtain the original recognition result; extracting correction parameters corresponding to the original recognition result from the distance correction relationship, and using the correction parameters to convert the original recognition result to generate a standardized vision result; performing a format conversion on the standardized vision result according to the target format to obtain the format-converted standardized vision result; and generating a structured variable distance correction result. This application improves the automation level of variable distance correction and standardized result generation of electronic vision charts, and can perform multiple format conversions and structured recording, facilitating multi-scenario use and interconnection, and enabling collaborative product applications with existing modules.
Owner:BEIJING ZHIPU SUNSHINE HEALTH MANAGEMENT CO LTD
Regional eye movement tracking user parameter calibration method
The embodiment of the invention provides a regional eye movement tracking user parameter calibration method. The method comprises the following steps: collecting a calibration eye pattern of each calibration point watched by a human eye; determining a calibrated pupil feature and a calibrated light spot feature of each calibration point; calculating a calibrated cornea curvature radius and a calibrated cornea curvature center of each calibration point according to the calibrated pupil feature and the calibrated light spot feature of each calibration point; determining the calibration optical axis direction of each calibration point and the distance from the calibration pupil center to the calibration cornea curvature center according to the calibration cornea curvature center and the calibration pupil center of each calibration point; calculating an included angle between the calibration optical axis direction and the calibration visual axis direction of each calibration point; and collecting an actual eye pattern, and calculating the actual optical axis direction of the actual eye pattern according to the included angle and the actual optical axis direction of the actual eye pattern. By performing regional calibration on each calibration point, the eye movement tracking accuracy and precision are improved.
Owner:NANCHANG VIRTUAL REALITY RES INST CO LTD
Eyeglass lens production method, eyeglass lens ordering device, eyeglass lens order receiving device, and eyeglass lens ordering and order receiving system
Contrast sensitivity of a wearer of an eyeglass lens (10) is measured using a first eye chart and a second eye chart with different spatial frequencies, and the eyeglass lens (10) is designed using a design parameter based on the contrast sensitivity of the wearer. For example, the eyeglass lens (10) is designed such that a distribution of an addition power in a progressive portion of the eyeglass lens (10) becomes high, that is, a refractive power of the progressive portion becomes high as a difference (rate of change) in contrast sensitivity with respect to the different spatial frequencies becomes large.
Owner:NIKON ESSILOR
Self-service vision testing lamp box, tester and testing method
The invention discloses a self-service vision test lamp box or tester and a test method, and relates to the technical field of vision test equipment, the self-service vision test lamp box or tester comprises a lamp box, the front side of the lamp box is provided with a visual chart and a camera; the remote controller is internally provided with a gyroscope, the gyroscope is used for collecting real-time attitude data, and the light box main control unit is used for determining a vision test result according to the real-time attitude data; the voice broadcast circuit is connected with a microphone, the microphone converts voice emitted by a tested person into an electric signal, and the lamp box main control unit judges whether the input direction of the tested person is correct or not; the camera collects a gesture image of a tested person, the lamp box main control unit recognizes the gesture direction, and the vision testing result is determined according to the gesture direction. After the vision tester is adopted, a tested person interacts with the lamp box through operation of pointing, voice or gestures of the remote controller, then the input direction of the tested person is intelligently recognized, additional person assistance is not needed, and self-service vision testing in the true sense is achieved.
Owner:陕西摩高昆科技创新有限公司
Visual chart device, method and system for measuring adjustment amplitude and gathering near points
The invention discloses a visual chart device, method and system for measuring adjustment amplitude and gathering near points, and particularly relates to the technical field of medical optical equipment, and the technical key points are as follows: a sighting target display module, which is used for displaying sighting targets based on the size of the sighting targets calculated by a calculation processing module; the distance measuring module is used for measuring the real-time distance between the eyes of the detected person and the sighting mark display module; the calculation processing module is used for responding to the distance recording signal, acquiring the real-time distance measured by the distance measuring module based on the distance recording signal, and calculating to obtain an adjustment amplitude and a set near point; the recording signal input module is used for acquiring a distance recording signal and inputting the distance recording signal into the calculation processing module; acquiring a distance recording signal input by the detected person, and recording a real-time distance measured by the distance measuring module at the current moment based on the distance recording signal; and calculating the adjustment amplitude and the set near point by using the real-time distance measured at the current moment.
Owner:WEST CHINA HOSPITAL SICHUAN UNIV
Pocket visual chart inspection equipment
The utility model discloses pocket visual chart examination equipment, and relates to the technical field of visual examination equipment. The device comprises a lens cone, wherein an observation window is formed in the front end of the lens cone; the vision screen is mounted in the lens cone; the light source is arranged in the lens cone and located on the rear side of the vision screen; the iris diaphragm is arranged in the lens cone and located on the front side of the vision screen, the iris diaphragm is connected with a diaphragm indication drive plate used for adjusting the visual range, and the diaphragm indication drive plate is rotationally arranged at the rear end of the lens cone in a sleeving mode; and the eyepiece is arranged in the lens cone and close to the observation window. A lens is used between the vision screen and an observer, the observation distance is shortened, the distance between two points of the visual chart is reduced or enlarged in an equal proportion, the two points reach the visual angle needed by the fundus, illumination, the vision screen, a light path and an observation opening are integrated into a space, a pocket type handheld device is formed, self-examination can be completed by holding the visual screen close to the eyes, and the visual chart is convenient to use. The device is small in size, attractive, convenient to take out for use at any time and convenient to store.
Owner:丹阳易久科技有限公司
Medical logarithmic LED optometric chart light box (charged home version)
Owner:SHANGRUN (HENGSHUI) HEALTH TECHNOLOGY CO LTD
Eye magnetic conditioning device and method
PendingCN120837846AElectrotherapyDevices for pressing relfex pointsIncreased blood flowMagnet therapy
The invention discloses an eye magnetic conditioning device and method, and relates to the technical field of eye treatment. Magnetic induction magnets are adopted to surround the eye circumference, and 13 acupuncture points around the eye circumference are synchronously massaged. The method has the following beneficial effects that the eyesight is rapidly improved, and the number of visual chart recognition lines is averagely improved by 1.5 lines after a pseudomyopia patient is conditioned for one time; after the course of treatment, the naked eye vision is improved by 2.0 D or above, and 73% of patients account for; a physiological mechanism verifies that ciliary muscle blood flow is increased by 45%; the crystalline lens adjustment amplitude is improved by 22% + / -3%; the safety advantages are as follows: the magnetic induction intensity is lower than an ICNIRP public exposure limit value; and the non-invasive operation realizes zero accident rate.
Owner:CHANGZHOU JIUGONGCI HEALTH MANAGEMENT TECHNOLOGY CO LTD
Portable integrated optical zoom subjective optometry unit
The invention discloses a portable integrated optical zoom subjective optometry unit, which comprises an equivalent sighting mark device, a continuous zoom optical assembly and a focal power display device, and is characterized in that the continuous zoom optical assembly comprises a first spherical negative lens, a first spherical positive lens and a second spherical negative lens which are sequentially arranged on the same optical axis; the equivalent sighting target device comprises an optical component and an equivalent sighting target plate, the optical component and the first spherical positive lens are arranged at a fixed interval with the same optical axis, the second spherical negative lens is located between the optical component and the first spherical positive lens, the optical component has positive focal power, and the focal power display device displays the overall focal power of the continuous zoom optical assembly; and the sighting target on the equivalent sighting target plate is equivalent to a standard sighting target on a standard visual chart at a standard distance from the optical component. The portable optometry device greatly improves optometry portability, has the same detection standard as a standard visual chart for optometry, and is accurate and reliable in optometry structure.
Owner:SHENYUER OPTICAL INSTR (SHANGHAI) CO LTD
Medical multifunctional vision eyeshade for children
The utility model relates to the technical field of medical instruments, in particular to a medical multifunctional vision eyeshade for children, which comprises an eyeshade body, the eyeshade body comprises a first eyeshade, a third eyeshade and a second eyeshade, the third eyeshade is positioned in front of the first eyeshade, and the second eyeshade is positioned in front of the third eyeshade. The first eyeshade comprises a head and a first supporting rod fixedly connected with the head, the second eyeshade comprises a top and a second supporting rod fixedly connected with the top, a needle hole is formed in the front end face of the head of the second eyeshade in a penetrating mode, and the head of the third eyeshade is a plane standard visual chart. Therefore, the problems of myopia, astigmatism, amblyopia and the like can be integrated when the eyesight of children is detected in the existing eyesight detection technology, the problem that an existing eyesight covering plate is single is solved, and a near eyesight card, a covering plate, a pinhole plate and the like need to be worn in work are solved. Clinical work is more convenient, time and labor are saved, the cooperation degree of children is high, and clinical results of doctors are more accurate.
Owner:AIER EYE HOSPITAL GRP CO LTD CHANGSHA AIER EYE HOSPITAL
Visual target presentation device
Provided is a visual target presentation device that makes it possible to prevent misalignment of an eye being examined, while saving space and being low in cost. The present invention comprises: a display device (distant eye chart (41)) that emits a visual target light beam; a visual target presentation window (W); a visual target presentation optical system (5) that guides, to the visual target presentation window (W), the visual target light beam which has been emitted from the display device; a position acquisition unit (second imaging unit (62), position detection unit (73)) that acquires the position of an eye (E) being examined; a determination unit (74) that determines, on the basis of the position of the eye being examined acquired by the position acquisition unit, whether or not the eye (E) being examined is included in an examinable range (R); and a display control unit (70) that, when the determination unit (74) has determined that the eye being examined is included in the examinable range, switches the display device to an examination mode in which the visual target light beam is emitted and that, when the determination unit has determined that the eye being examined is not included in the examinable range, switches the display device to a position adjustment mode in which to emit a light beam of a notification image (76) representing the positional relationship between the eye (E) being examined and the examinable range (R).
Owner:TOPCON CORPORATION