Abstract: The present disclosure provides improved methods and apparatus for evaluation of an individual's cognitive performance in a fast-paced, visually dynamic environment. The apparatus may comprise a display configured to present a plurality of stimuli to the subject, and a processor coupled to the display, the processor comprising instructions to determine a subject's visual perceptual skills, memory and learning skills, and response command and control skills. The methods and apparatus described herein can evaluate key cognitive processes that underlie split-second decision-making in visually dynamic environments. The results can provide comparison of cognitive skills across individuals performing in a specific environment, as well as evaluations of more targeted sets of cognitive processes for specific positions in an environment that might require unique sets of skills.

Abstract: For measuring quality of view over a visual field of view of an eye, during a measuring period, deviations between gaze positions and associated stimulus positions where the stimulus to be followed was displayed when the gaze position was detected and magnitudes of the registered deviations arte determined. For each field portion of a map of a visual field of view, quality of view is determined in accordance with a quality of view estimates of associated ones of the registered deviations of which the associated stimulus positions are located relative to the gaze position so that the associated stimulus positions are in that field portion. For each of the associated ones of the registered deviations, the quality of view is estimated in accordance with the magnitude of that associated one of the registered deviations and with magnitudes of at least preceding or succeeding ones of the registered deviations.

Abstract: A method for creating a temporal-spatial dissociation between an ambient visual process and a focal visual process of a user is provided. The method includes rendering, via a parallactic ambient visual-field enhancing (PAVE) module configured to execute on a computing device communicatively coupled to a head mounted display device worn by a user, a fixation target and a background located behind the fixation target displayed within the head mounted display device. The method further includes updating, via the PAVE module, the rendering of the background within the head mounted display device, wherein the update comprises a virtual movement of the background behind the fixation target.

Abstract: Systems and methods for improving the peripheral vision of a subject are disclosed. In one aspect, embodiments of the present disclosure includes a method, which may be embodied on a system, for improving peripheral vision of a subject using a visual marker on a display screen, the method includes, displaying a peripheral target on the display screen, the peripheral target having a visually discernable characteristic and determining whether the subject is able to correctly identify the peripheral target displayed on the display screen using the peripheral vision. The visual marker is intended for viewing using central vision of the subject and the peripheral target is intended for identification using the peripheral vision of the subject.

Abstract: Methods and diagnostic tools are provided for assessing contrast sensitivity in a subject in the presence and absence of luminance noise by: i) presenting to the subject a series of scenes, each scene comprising at least a first target having a preselected level of contrast superimposed on a uniform background and a second target having a preselected level of contrast superimposed on a luminance noise background, wherein in each successively presented scene the first and second targets that are superimposed on the uniform background and on the luminance noise background, respectively, have contrast levels that are different from the contrast levels of the first and second targets superimposed on the uniform background and on the luminance noise background, respectively, in the previously presented scene; ii) monitoring responses by the subject to step i); and iii) evaluating the contrast sensitivity of the subject based on the monitored responses.

Abstract: The invention relates to a method for obtaining a visual field map of an observer, particularly a perimetry method, wherein a plurality of test locations in front of the observer is provided, at each test location of a subset of said plurality a respective perceived sensitivity threshold is measured, wherein at least one light signal is provided at the respective test location, and wherein it is monitored whether said observer observes said at least one light signal, and wherein for each test location a respective estimate of the perceived sensitivity threshold is derived from the previously measured perceived sensitivity thresholds of said subset, and wherein said light signal is provided at a light intensity value derived from the estimate of the perceived sensitivity threshold of said respective test location.

Abstract: A method for application of light to one or more eyes (300) of a user is disclosed. The method comprises identification (110) of location of an optic disk (330) on a retina (320) in the one or more eyes (300) and selectively applying (115) the light onto the optic disc (330) to stimulate the optic disk (330).

Abstract: The current subject matter relates to rehabilitation using a content guide for viewing video, for example as a vision rehabilitation aid for individuals with hemianopia or as a rehabilitation aid for individuals with attention disorders. The current subject matter includes providing video in which a region of interest of the image is specified with a marker, referred to herein as a content guide. The content guide can include a circle surrounding the region of interest. By providing video with a content guide to direct viewers to a region of interest in the video, information acquisition by the viewers is improved. Such an approach can aid individuals with vision deficits or attention disorders. The current subject matter can also be used as a therapy for spatial neglect. Related apparatus, systems, techniques and articles are also described.

Abstract: A visual coding system is contemplated to facilitate encoding and decoding of visuals, representations, images, etc. utilized to facilitate immersive, augmented reality (AR), virtual reality (VR), light field or other types of video. The visual coding system may facilitate coding, scaling, segmenting, tiling, or otherwise processing portions of individual frames differently depending on light, color and/or spatial resolution sensitivities of the human visual system (HVS), such as to account for the HVS processing light/color information unequally/differently across its field of view.

Abstract: A method and an apparatus for capturing a visual field of a person having a scotoma, in particular a central scotoma, are disclosed. The method includes continuously capturing the eye alignment of the person with a capturing unit, sampling the visual field of the person point-by-point to determine points suitable and not suitable for sight in the visual field of the person, finding the scotoma as a region with a multiplicity of points not suitable for sight, calculating an outer boundary line of the scotoma, calculating an outer enveloping curve, which surrounds the outer boundary line of the scotoma at a predetermined distance, and displaying the outer enveloping curve on a display unit. The enveloping curve is perceivable by the person on the display unit as a frame of the scotoma.

Abstract: The present disclosure provides improved methods and apparatus for evaluation of an individual's cognitive performance in a fast-paced, visually dynamic environment. The apparatus may comprise a display configured to present a plurality of stimuli to the subject, and a processor coupled to the display, the processor comprising instructions to determine a subject's visual perceptual skills, memory and learning skills, and response command and control skills. The methods and apparatus described herein can evaluate key cognitive processes that underlie split-second decision-making in visually dynamic environments. The results can provide comparison of cognitive skills across individuals performing in a specific environment, as well as evaluations of more targeted sets of cognitive processes for specific positions in an environment that might require unique sets of skills.

Abstract: A visual field/visual acuity examination system includes a retinal projection head-mounted display; and a terminal device. The terminal device outputs examination image data to the retinal projection head-mounted display; displays an image on a display; and generates an examination image based on the examination image data and display the examination image on the display. The retinal projection head-mounted display inputs the examination image data from the terminal device; generates an image light beam based on the input examination image data and control emission of the image light beam from a light source; causes a scanning minor to scan the image light beam to generate an examination image light beam; and projects the examination image light beam as the examination image on a retina of an eyeball of a test subject after converging the examination image light beam in a vicinity of a pupil of the eyeball.

Abstract: Methods, apparatus, and systems for performing an ophthalmic diagnostic test are disclosed. In one aspect, a head-wearable device for administering an ophthalmic test to a subject can comprise a head-wearable frame for mounting the device onto the subject's head, and a light seal configured for coupling to the frame so as to isolate at least one eye of the subject from ambient light when the device is worn by the subject.

Abstract: Photo-stress by focal light bleaches the retina and temporarily reduced retinal function. Recovery from suppression is measurable by monocular and binocular endpoints, when recovery is prolonged a disease is suspected. The monocular endpoint is the moment the dark central afterimage representing the macula becomes the same brightness as the peripheral ring representing unstimulated retina and the binocular endpoint is brightness equality of rivalrous stimuli. Four embodiments are described for measuring relative brightness sense photo-stress utilizing monocular and binocular methodology.

Abstract: A pattern stimulus system is described that includes a hemispherical concave surface, a plurality of illumination sources, and a controller. The illumination sources are arranged on the hemispherical concave surface in a plurality of annular rows and a plurality of radial columns. The control is configured to operate the illumination sources to display a checkerboard pattern by illuminating a first subset of the illumination sources and dimming a second subset of the illumination sources. The control is further configured to invert the checkerboard pattern by dimming the first subset of the illumination sources and illuminating the second subset of the illumination sources. Methods are also described for using the pattern stimulus system to evaluate a condition of the eye and to diagnose diseases of the eye.

Abstract: A surgical hub within a surgical hub network may include a controller having a processor, in which the controller may determine a priority of a communication, an interaction, or a processing of information based on a requirement of a system or a device communicating with the hub. The controller may prioritize an order of transmission of communication packets, including packets to a device outside of the network. The packets may include data to update routines, processes, or execute a critical procedural step. The controller may prioritize a communication traffic flow within the hub network. A network of surgical hubs may include a first hub having a first controller and a second hub having a second controller. The first controller may control interactions between the first hub and the second hub based on the capabilities of the first hub and a location of modules within the network.

Abstract: The invention provides an advantageous system and corresponding method for measuring a plurality of aspects of vision. It is a computer-implemented, user-interactive system which can be used by practitioners such as opticians to measure and assess a patient's visual acuity. It comprises a handheld computing device arranged and configured to present at least one optotype to a user (patient) within a gamified environment. This aspect of the invention provides the advantage that it is more easily used by certain types of patients, such as children, the elderly or those suffering from medical/clinical conditions who would typically struggle to use traditional measuring tools.

Abstract: Methods, apparatus, and systems for performing an ophthalmic diagnostic test are disclosed. In one aspect, a head-wearable device for administering an ophthalmic test to a subject can comprise a head-wearable frame for mounting the device onto the subject's head, and a light seal configured for coupling to the frame so as to isolate at least one eye of the subject from ambient light when the device is worn by the subject.

Abstract: A cognitive/multisensory stimulation system simulates real sports action/job task scenarios for assessing, profiling, practicing, improving or rehabilitating cognitive function performance of athletes or individuals.

Abstract: An improved visual field perimeter testing tool is provided that employs a head mounted display apparatus configured to removably support a hand-held electronic device comprising at least one processor, memory system and integral display screen. The memory system stores a software program executed by the at least one processor, wherein execution of the software program carries out visual field perimeter testing of a subject wearing the head-mounted display apparatus whereby discrete stimuli are presented to the subject on the display screen of the hand-held electronic device. In order to address nonlinearity of the display characteristics of the hand-held electronic device, a calibration routine can be performed to generate calibration data that is stored as part of the software program and used to generate the RGB pixel values for the discrete stimuli and background that surrounds the discrete stimuli in a manner that provides accurate contrast sensitivity measurements during the testing.

Abstract: An aspect of the present invention provides a method for early detection of ocular disease such as glaucoma in a subject. The method comprises the steps of: successively applying a plurality of test stimuli at different eccentricities to the subject's retina, wherein each of the test stimuli is adjusted for differences in spatial or temporal summation resulting from application of the test stimuli; determining visual field capability loss of the subject in response to each of the plurality of test stimuli; and diagnosing ocular disease in the subject if the subject's visual field capability loss in response to each of the test stimuli is substantially equal.

Abstract: Low-cost, easy-to-use alignment target generators for aligning a user's own face or eye to a camera or scanner are based on field-of-view visual feedback from a filtered or apertured planar light source. These approaches may be made agnostic to the scanner's operating system or other software. Alternatively, software on the scanner or its host device may create a solid light-colored section of an existing display screen to use as a planar light source. In some embodiments, the planar light source may be the virtual image of an object viewed in a plane mirror.

Abstract: The invention relates to mobile computer devices, front-mounted optical systems and computer program products allowing perimetry measurement.

Abstract: Various embodiments relate to systems and methods for performing eye examinations using an HMD that is able to present an image to each eye individually and then to both eyes simultaneously. Because the HMD, rather than a patient, controls conditions (e.g., glare, brightness) during the examination, test results are more likely to be accurate and reliable. In some embodiments, the HMD employs voice recognition to replicate the conversational exchange that would typically occur between the patient and the ophthalmologist or optometrist. The HMD may also be configured to change the visual environment experienced by the patient during testing. Further yet, the HMD, or another distinct computing system, may be configured to identify abnormal test results in real-time and, in some embodiments, the examination is modified accordingly. For example, tests scheduled to be performed during the examination can be modified or removed and new tests can be added.

Abstract: The present disclosure is directed toward tracking visual gaze information. Methods and systems of the present disclosure track a visual gaze of a user with respect to a display of a computing device. In particular, one or more embodiments track a visual gaze of a user with respect to content on a display. The methods and systems can use information about the visual gaze of the user for use in improving the presentation of content. For example, the systems and methods can increase a display size or volume of content in response to the visual gaze of the user. Still further, the methods and systems can use the visual gaze information for providing analytics regarding the viewing habits of the user.

Abstract: A method is provided for displaying an immersive video content according to eye movement of a viewer includes the steps of detecting, using an eye tracking device, a field of view of at least one eye of the viewer, transmitting eye tracking coordinates from the detected field of view to an eye tracking processor, identifying a region on a video display corresponding to the transmitted eye tracking processor, adapting the immersive video content from a video storage device at a first resolution for a first portion of the immersive video content and a second resolution for a second portion of the immersive video content, the first resolution being higher than the second resolution, displaying the first portion of the immersive video content on the video display within a zone, and displaying the second portion of the immersive video content on the video display outside of the zone.

Abstract: A method for assessing the function of at least one sensory field of a subject, and apparatus and systems for carrying out the method, the method comprising: using a display, presenting stimuli to selected locations of the sensory field, the selected locations being centered at points on a sampling grid spanning a portion of the sensory field, wherein the individual stimuli if presented simultaneously at the sampling grid points would overlap in the space defined by the sensory dimensions of the field; using a sensor, detecting responses in the subject's sensory field evoked by the stimuli; and processing the detected responses to relate them to the function of the subject's sensory field at the selected locations.

Abstract: A rapid screening device has a sensing unit, a processing unit and a carrier, the processing unit is connected to the sensing unit, the sensing unit and the processing unit are disposed on the carrier, the sensing unit captures an image of an eyeball and outputs an image signal of the eyeball, the image of the eyeball is resolved from the image signal of the eyeball, the processing unit retrieves a plurality of images from the sensing unit within a predetermined time interval and executes an algorithm to generate a calculated result by the images of the image signals of the eyeball, and the calculated result is used to diagnose or predict a disease.

Abstract: A system for use in remote medical diagnosis of a biological subject, the system including one or more electronic processing devices that receive image data indicative of at least one image of part of the subject's eye from a client device via a communications network, review subject data indicative of at least one subject attribute, select at least one analysis process using results of the review of the subject data, use the analysis process to quantify at least one feature in the image data and generate an indicator value indicative of the quantified at least one feature, the indicator value being used in the assessment of a condition status of at least one condition.

Abstract: One embodiment of the invention provides a method for performing a supra-threshold test of sensitivity across a visual field of a subject. The method includes presenting a stimulus at each location of a set of locations spread across the visual field and obtaining for each stimulus a result indicating whether or not the stimulus was seen by the subject. The method further includes determining for each location whether or not to re-present a stimulus at that location, wherein for a given location, the determining involves combining results obtained from multiple locations. These multiple locations are defined by a cluster associated with the given location, with the cluster being determined based on the paths of optic nerve fibre bundles across the visual field.

Abstract: An information processing device includes an API (Application Programming Interface) only for reading/writing of an offset value, which is data providing disparity to a graphics image to generate an image for the left eye and an image for the right eye from the original image, arranged to store the offset value in an internal storage region that is a storage region inside of a reproducer configured to reproduce images, and to read out the offset value stored in the internal storage region.

Abstract: A method of visual cognitive training is performed at a device with a display. The method includes sequentially displaying a plurality of visual stimuli in a first region of a subject's field of view. While sequentially displaying the plurality of visual stimuli, the device moves the first region periodically along a predefined path within the subject's field of view. The device prompts the subject to respond to a task associated with the sequential display of the plurality of visual stimuli. The device receives a response to the task associated with the sequential display of the plurality of visual stimuli and records information corresponding to the subject's response to the task associated with the sequential display of the plurality of visual stimuli.

Abstract: A cognitive and/or motor skill testing system and method may include a processor that records respective time information for each of multiple positions of a display device that are traced during administration of a test, that determines speed and/or velocity values based on the recorded time information, and that outputs test result information based on the determined values. The test result information may be based on a comparison between a graphed curve of such values to an ideal curve. The positions may correspond to a path between displayed targets whose size and/or distance therebetween depend on past test performance. The system and/or method may output a change expected with a change to therapy parameters for a patient, where the expected change is determined based on changes which occurred in other patients having similar test results and therapy parameters as those of the patient.

Abstract: One aspect of the disclosure includes a method to assess vision function. In one embodiment, the method comprises providing a sequence of test images on a display (106) to a test subject (102) during a stimulus interval and providing a response pattern image for each of the sequence of test images during a response interval after the stimulus interval. Each of the sequence of test images includes multiple stimulus patterns (304, 306) arranged around a fixation target (302). The response pattern image includes multiple response targets (320), each of which corresponds to a location of each of the multiple stimulus patterns (304, 306). One (304) of the multiple stimulus patterns (304, 306) differs. An assessment of a vision function of the test subject (102) is based on a selection by the test subject of one of the multiple response targets (320) that the test subject indicates corresponds to a location of the multiple stimulus pattern that differs (304).

Abstract: A method and apparatus for inspecting a structure. Images of heat generated by an inconsistency in the structure are received. A final image is generated from the images using portions of the images having a greatest amount of heat.

Abstract: Described herein is a light directing assembly for use in an object analysis system. The light directing assembly includes a plurality of optical relay assemblies. Each optical relay assembly includes at least one optical element configured to relay an interrogation beam from a light transmission system to an object and relay a return beam from the object to the light transmission system, the return beam being generated by reflection or back scattering of the interrogation beam by the object. Each optical relay assembly defines an interrogation angle at which the interrogation beam relayed by the optical relay assembly reaches the object, and an optical path length being the distance from the light transmission system to the object traveled by an interrogation beam via the optical relay assembly.

Abstract: A method and an apparatus for testing night vision are disclosed. At least one visual mark is presented to a test person having an open pupil from a distance of several meters. The visual mark is configured as a light point, and a visual impression of the test person is determined by means of the visual mark. The apparatus comprises means for opening a pupil of a test person, in particular a darkened room. An examination position for the test person and a presentation apparatus for visual marks arranged at a distance of several meters from the examination position are also provided. The presentation apparatus comprises at least one point-shaped light source. A light beam thereof is directed towards the examination position. Means are provided for determining a visual impression of the test person with the help of the visual marks.

Abstract: A cognitive stimulation system for assessing, profiling, training, and improving performance of athletes and other populations is provided. A sensory semantic language is established with an athlete for relating semantic meaning of a number of sensory signals to corresponding possible actions, the sensory semantic language being essentially new to the athlete. The athlete is instructed to perform an athletic exercise involving skills and full body movement. During the exercise sensory signals are provided to the athlete to require rapid discernment by the athlete of the semantic meaning of the sensory signal to correctly choose one possible action. Whether the athlete correctly responds to the selected sensory signal during said exercise is determined. The system simulates sports scenarios during real sports actions by stimulating different perceptive-cognitive and motor mechanisms typically experienced by athletes during real competition.

Abstract: The perimeter (2), which has a perimetry means (13) that measures the visual field of a test eye and outputs the results thereof as measurement results (MR), is configured by comprising: a measurement database memory (17) wherein multiple measurement results of previous visual field measurements are stored as a measurement database (MDB) in a form that is divided into a database (DB1) pertaining to normal eyes and a database (DB2) pertaining to eyes with glaucoma; a means (16) for assessing whether or not the measurement results (MR) for the test eye can be used as measurement results for normal eyes; and a means (15) that, when it is determined that the measurement results can be used as measurement results for normal eyes, adds the measurement results to the database (DB1) pertaining to normal eyes along with database search attribute data (data such as the subject's age, sex, race, visual acuity, refractive index, diagnosis, residence, date and time of examination, etc.).

Abstract: A system for clinical examination of visual field functioning, comprising a programmable display configured to generate the 2D or 3D image of specialized examination image for a limited duration to the viewer, a lenticular unit comprising one or more lenticular plates configured to project a 2D or 3D image of an examination image to a viewer, wherein the examination component visible to the viewer is dependent on an orientation of the lenticular unit with respect to the viewer and through the lenticular unit. The method projects an specialized examination image on predetermined portions of the viewer's visual field by generating a 2D or 3D image of the examination image for a limited duration from a programmable display, or projected through at least one lenticular lens toward the viewer's visual field.

Abstract: A method of customizing a vehicle component control system of a vehicle includes creating a performance characteristic. A stimulus is presented via a stimuli presentation system. An actuation sensor detects actuation of a vehicle component of the vehicle component control system in response to the stimulus. A controller determines the performance characteristic based on the detected actuation. The performance characteristic is stored in a memory device. A vehicle control characteristic of the vehicle component control system is adapted based on the performance characteristic.

Abstract: An apparatus, system and method for performing a health correlation assessment based upon results an eye contrast sensitivity measurement test of a person. The health correlation assessment yields a predictive and probabilistic measure of the likelihood of the person appropriately assigned to a particular clinical health classification. Such an eye contrast sensitivity measurement can be used to identify people who are likely to be within a pre-Alzheimer's disease state or within Alzheimer's disease state of health and identify those who should seek further clinical and/or other types of testing to ascertain their actual health status and to determine an appropriate course of medical treatment.

Abstract: Systems and methods for improving the peripheral vision of a subject are disclosed. In one aspect, embodiments of the present disclosure includes a method, which may be embodied on a system, for improving peripheral vision of a subject using a visual marker on a display screen, the method includes, displaying a peripheral target on the display screen, the peripheral target having a visually discernable characteristic and determining whether the subject is able to correctly identify the peripheral target displayed on the display screen using the peripheral vision. The visual marker is intended for viewing using central vision of the subject and the peripheral target is intended for identification using the peripheral vision of the subject.

Abstract: Systems and methods are provided for altering the position or visual appearance of a movable indicator in a GUI that is controlled by eye tracking to counteract a perceptual fading of the movable indicator with respect to the GUI. The position of the user's point of gaze may be tracked, the movable indicator may be rendering at a position associated with the user's point of gaze, and the position or visual appearance of the movable indicator may be altered when an event, such as a passage of time or a blinking of the user's eyes, is detected.

Abstract: A control method of a fundus examination apparatus configured to examine a fundus of an examinee's eye, includes: processing an examination data obtained by one of fundus examination apparatuses, which are a perimeter configured to measure a visual field and an optical coherence tomography device configured to obtain a tomographic image of the fundus, to thereby obtain positional information relating to an abnormal site of the fundus; setting an examination position on the fundus in the other fundus examination apparatus which is the perimeter or the optical coherence tomography device based on the positional information; and examining the abnormal site of the fundus by controlling the other fundus examination apparatus based on the set examination position.

Abstract: An analysis method for determining a morphological property of an optic disc and/or a retinal nerve fiber layer of an eye is, performed an ophthalmological device, in particular a perimeter, and also means for data processing using a database with functional data of a field of vision and morphological data of the optic disc and/or retinal nerve fiber layer, wherein, by the ophthalmological device, functional data of a field of vision of the eye are measured, a retina being divided into points representing the field of vision, optical stimuli of a defined intensity being provided to the points of the retina, a reaction to a stimulus being determined as a measuring result of a point, the measuring results having a statistically significant relation to morphological data of the optic disc and/or the retinal nerve fiber layer, the morphological data nerve fiber layer being derived from the measuring results and the datasets.

Abstract: This invention relates to a method for providing markers for evaluating and/or practising the visual field recognizable by an eye, and/or eyes, and/or visual system of a person. The method relies on the reporting of the person of identifications of fixation objects only identifiable when the eye or eyes of the person are accurately fixated on the fixation object. Accordingly active monitoring of a saccade, if a saccade triggering stimulus is employed; or smooth pursuit, if smooth pursuit triggering stimulus is employed, of the eye of the person is not needed for determining whereto to eye or eyes are fixated. The present invention also relates to the use of a system employing the method of the invention. The present invention further relates to a system for the method of the invention and a software product for the system.

Abstract: In one example of the invention a patient display is provided on which a fixation graphic or video is shown in substantially the center of the display, and then target graphics or video are shown at different positions on the display about the center. A test subject is positioned in front of the patient display a known distance therefrom, and a camera captures an image of the test subject's eyes, to allow gaze direction determination to be performed. The captured images are displayed to a clinician user by a controlling test application, the clinician making a determination based on the images as to whether the test subject saw a target graphic or video when it was displayed. The clinician user then makes an appropriate input into the controlling test application, which also logs the position at which the target image was displayed.

Abstract: In one example of the invention a patient display is provided on which a fixation graphic or video is shown in substantially the centre of the display, and then target graphics or video are shown at different positions on the display about the centre. A test subject is positioned in front of the patient display at a known distance, and a camera captures an image of the test subject's eyes, to allow gaze direction determination to be performed. The captured images are displayed to a clinician user by a controlling test application, the clinician making a determination based on the images as to whether the test subject saw a target graphic or video when it was displayed. The clinician user then makes an appropriate input into the controlling test application, which also logs the position at which the target image was displayed.

Abstract: A static visual field scanning apparatus including: visual field scanning screen generating means; fixation image displaying and controlling means; scan line setting means; scanning point setting means; visual target displaying and controlling means; the first detection means; the second detection means; visual field mapping screen generating means; immediate post first detection scan continuation means; immediate post second detection scan continuation means; response waiting means; visual target display coordinates storing means; visual target perception inability symbol mapping means; the first completion judgement means; the second completion judgement means; post first completion judgement the next scanning point calculation means; and post second completion judgement the next scanning point calculation means.