EP4277513A1

EP4277513A1 - Method and device for measuring the visual field of a person

Info

Publication number: EP4277513A1
Application number: EP22701203.6A
Authority: EP
Inventors: Friedrich Hoffmann; Fabian Müller
Original assignee: H & M Medical Solutions GmbH
Current assignee: H & M Medical Solutions GmbH
Priority date: 2021-01-14
Filing date: 2022-01-14
Publication date: 2023-11-22
Also published as: WO2022152861A1; KR20230129032A; US20240074651A1; AU2022209122A1; JP2024502665A; CA3204951A1

Abstract

The invention relates to a method for measuring the visual field of a person by means of a device, comprising the following steps: displaying a visually detectable test spot on a surface display of the device, which surface display is viewed by the person by means of an eye of the person, wherein a spatial position of the head of the person remains unchanged with respect to the surface display; moving the test spot on the surface display by means of the device along a path during a measurement pass and activating an interaction means of the device by the person if the displayed test spot stops being visible or becomes visible again to the person at a current position during the movement of the test spot along the path, wherein, by activating the interaction means, the device is prompted to store the particular current position and any associated information from which it can be derived whether the test spot has stopped being visible or has become visible again for the person at the current position; and displaying a range of the visual field of the person on a further surface display, wherein said current positions form boundary points of the range.

Description

Method and device for measuring a person's visual field

description

The invention relates to a method for measuring a person's visual field and a corresponding device.

Perimetry is an examination technique of the visual system. Human vision distinguishes between central and peripheral vision. Central vision can be determined as central visual acuity, peripheral vision is measured as peripheral visual field. The field of view corresponds to a mountain, with the respective height of a point in the field of view corresponding to the visual acuity at that point. The maximum of this optical field peak is above the center of the retina, the fovea centralis. Visual acuity continues to decrease towards the periphery. The peripheral visual acuity is measured with the help of the light difference sensitivity. Technically there are two different methods to measure the visual field mountain:

■ kinetic perimetry

■ static or profile or grid perimetry

Both methods attempt to define the peak of the visual field by having the patient signal the perception of the light stimulus. The perception threshold is thus determined subjectively. In kinetic perimetry, the probe is slowly advanced centripetally in a meridian and then in other meridians around the entire circumference with constant brightness in a hemispherical perimeter, while in static perimetry the brightness of the initially subliminal probe is gradually increased at fixed locations on a meridian test patch is reinforced. The observed test spot is marked in each case. With kinetic perimetry, which scans the mountain horizontally, several isopters, lines of the same sensitivity to differences in luminance, are gradually created. Static perimetry, which scans the mountain vertically, produces a mountain profile running through the center of the visual field mountain. Modern computer-controlled grid perimeters, which follow a given test spot grid and also scan the visual field mountain vertically, draw a map on which the deviations from the norm are blackened in different ways.

The difference between perimetry and campimetry is that in campimetry the test objects are not presented in a hemisphere as in perimetry, but on a screen or a flat surface. Campimetry is therefore more suitable for measuring the paracentral visual field. Common to all current methods is a slow horizontal or vertical approach to the threshold of perception. This process is tedious and time-consuming. It must be taken into account that many patients are old at the time of the examination and that the willingness to cooperate can decrease in many patients after a short time.

Current perimetry examinations usually require 15 minutes of concentrated work per eye. The long examination time explains the difficulties in correctly characterizing the perception threshold at all measurement points. The test results therefore vary greatly.

Computer-controlled automated perimetry programs have relieved the examiner of the tedious examinations, but so far there is no relief for the patient.

Against this background, it is the object of the present invention to provide an improved method and an improved device for measuring the visual field of a patient or a person. This object is solved by the subject matter of the independent claims, preferred embodiments being presented in the corresponding dependent claims and in the description below.

According to claim 1 there is disclosed a method for measuring a person's visual field by means of a device, comprising the steps of: a. Displaying a visually detectable test spot on a surface display of the device viewed by the person using one of the person's eyes, with a spatial position of the head of the person being fixed with respect to the surface display, and b. Moving the test spot on the area display by means of the device on a predefined path during a measurement run and triggering an interaction device of the device during a measurement run, preferably whenever the displayed test spot becomes invisible to the person at a current position as it moves along the path (so-called Off-point) or becomes visible again (so-called on-point), the device being prompted by the triggering of the interaction device to store the respective current position and associated information from which it can be derived whether the test spot is at the current position has become invisible or visible again for the person. Optionally displaying an area of the person's visual field. Preferably, the method has the further step: c. Displaying information and/or an area (90) of the visual field of the person (P) on the area display (2) and/or on another area display, the said current positions forming edge points of the area (90).

The method according to the invention is also referred to as rapid campimetry and represents a screening method with the aid of which the central 10° visual field of a person can be measured in a very short time, e.g. within a minute. The comparatively large test spot density during the measurement run, which preferably takes just under a minute, differs significantly from the automated computer perimetry methods and makes it easier to find scotomas. While the automated computer perimetry methods usually only measure at 16 or 25 test spots in the 10° field of view, with the present method the entire 10° field of view, e.g and to the right of the examination field center, the field of view of a person can be efficiently measured with high accuracy. The length of the section running through the test point during a standard run of an examination is: distance patient to monitor * factor 0.5 to distance patient to monitor * factor 3, in particular distance patient to monitor * factor 1 to distance patient to monitor * Factor 2, but especially distance between patient and monitor * factor 1.7625.

Example 01: 40 cm distance patient to monitor * factor 1.7625 = 70.5 cm distance

Example 02: 80 cm distance patient to monitor * factor 1.7625 = 141 cm distance

The relatively fast movement of the test spot and a preferably large contrast between a background of the area display and the test spot, as well as the short examination time, facilitate attention and increase the reliability of the measured data. In addition, the short examination time of e.g. 1 minute improves the applicability of the procedure in everyday clinical practice. If a visual field defect is found, an additional measurement controlled by the examiner can ensure greater precision of the measurement data collected. The course of the nerve fibers is well known. Assigned to the coordinates of the scotoma, the scotoma borders can be precisely programmatically defined as the course of the nerve fibers in the direction of the optic nerve (cf. Fig. 3).

The method is preferably carried out for each eye individually, with the person's eye not being measured being covered. Said area of the visual field can be displayed, for example, by the said current positions being displayed or marked, so that the examiner gets an impression of the area. Furthermore, the area can be emphasized more clearly by creating an outer border line connecting the current positions on the other area display. Alternatively or additionally, it is possible to highlight the area within the displayed border line (or within a virtual border line that is not displayed) in color compared to a background that is displayed on the further area display.

Said path on which the test spot is moved does not necessarily have to be continuous, but can consist of individual sections that are separate from one another and which are then traversed, for example, one after the other. In this case, the path or the said sections can in principle take any conceivable form, with the area of the person's field of vision to be examined preferably being traversed several times by the test spot along the path, so that the area is e.g. in two dimensions (i.e. e.g. horizontal and vertical or . based on the area displays (e.g. line and column by line) is scanned.

According to one embodiment of the method, it is provided that the test spot has a speed S/f in [cm/s] when moving on the surface display, where S/f is the ratio of the distance covered S divided by a number f that is in the range of 2 to 7, in particular in the range from 3 to 6, in particular in the range from 4 to 5, the number f being in particular 4.7.

Example 01: distance between patient and monitor = 40 cm; vertical run at 10° above and below the center of the examination area of 14.1 cm on the screen, the calculation is then 14.1 cm / factor 4.7 = 3 cm/s.

Example 02: distance between patient and monitor = 80 cm; vertical run at 10° above and below the center of the examination area of a total of 28.21 cm on the screen, the calculation is then 28.21 cm / factor 4.7 = 6.00213 cm/s.

Furthermore, according to one embodiment of the invention, it is provided that during the measurement run within a period of 1 minute at least 500 to 50000 different points (or pixels of the surface display) in the field of view are checked by means of the test spot, in particular at least 1000 to 25000 (or pixels of the Surface display) different positions, in particular at least 1500 to 10000 (or pixels of the surface display) different positions, in particular at least 2500 (or pixels of the surface display) different positions. During the measurement run, these points, which are also referred to as test spots, are preferably so close together that they partially overlap. For example, given a traversed path of about 70.5 cm at 40 cm distance between the patient and the monitor, a point or test spot path is subjectively created, which, for example, in the case of a narrow scotoma, results in only a brief darkening of the subjectively perceived path in the scotoma area.

In particular, the invention is based on the basic idea that the test spot appears to the patient as a constant point of light that is moving. Furthermore, according to one embodiment of the invention, it is provided that the path has an overall length of at least 17.625 cm to 705 cm, in particular of at least 35.25 cm to 352.5 cm, in particular of at least 52.875 cm to 176.25 cm, in particular of at least 70 .5 cm, with the test spot covering the entire path during the measurement process within a period of time that is less than or equal to 1 minute.

Furthermore, one embodiment of the method preferably provides for the person's eye or eyes to be at a distance from the surface display when moving the test spot along the path, which is in the range from 10 cm to 400 cm, preferably in a range from 20 cm to 200 cm, preferably in the range from 30 cm to 100 cm, the distance being in particular 40 cm.

According to a further embodiment of the invention, it is provided that the path has a plurality of first sections which are parallel to one another. According to a further embodiment, the path can have a plurality of mutually parallel second sections. In principle, this enables a two-dimensional scanning of regions of the person's field of vision or of the entire field of vision. Provision is preferably made accordingly for the first sections to cross the second sections, so that the first and second sections define a grid, for example.

According to one embodiment of the method, it is provided that the test spot is first moved along the first sections (e.g. in each case in a first direction) and then along the second sections (e.g. in each case in a second direction). The first sections of the path can run vertically on the surface display, with the second sections preferably running horizontally on the surface display (or vice versa). If one or both of the surface displays have an inclination to the horizontal, then vertical sections are also used then run substantially perpendicular to the horizontal portions of the path.

Furthermore, according to one embodiment of the invention, it is provided that the path has at least one section that runs along the vertical or inclined to the vertical. Furthermore, according to one embodiment, it is provided that the path has at least one section that runs in an arc, in particular in the shape of a semicircle. Furthermore, according to one embodiment of the invention, it is provided that the path has at least one section that crosses a nerve fiber and, in particular, runs orthogonally to the nerve fibers of the optic nerve of the person's eye to be examined.

Furthermore, according to one embodiment, it is provided that the path has a multiplicity of sections that run linearly.

Furthermore, according to one embodiment of the invention, it is provided that, in order to visualize said area of the field of view, the current positions of the measurement run at which the test spot has become invisible are connected with a line, which is displayed as an edge line of the area on the further area display, and /or that the current positions of the measurement run, at which the test spot has become visible, are connected with a line, which is also displayed as an edge line of the area on the further area display.

According to a further embodiment of the method, it is provided that the area surrounded by the edge lines on the further surface display is displayed as optically separated from the background of the further surface display.

Furthermore, the method according to the invention can provide in one embodiment that the detected area (limited by the stored current positions) is checked by the test spot being repeatedly controlled by an examiner on the surface display out of said area into a surrounding area in which the test spot is again visible to the person.

Furthermore, according to one embodiment of the method, it is provided that a central object is displayed on the surface display during the measurement run, in particular in the form of a cross, which is weaker in light than the test spot, and which is used to fix a line of sight of the person (and thus the field of view) through the person can be observed, with the device preferably detecting during the measurement run whether a viewing direction of the person deviates from the central object, and stopping the movement of the test spot if a deviation is detected.

Furthermore, according to one embodiment of the invention, it is provided that a movement of the test spot during the measurement run is coupled to the interaction device in such a way that when the interaction device is triggered, the test spot is stopped and returned (in particular according to the reaction time of the person) along the path in the opposite direction becomes. According to one embodiment of the invention, it is provided that the test spot has a brightness that is in the range of, in particular, 200 cd/m ² to 1000 cd/m ² , which is in the range of, in particular, 300 cd/m ² to 400 cd/m ² .

According to one embodiment, the test spot is preferably displayed on the surface display in front of a (preferably dark) monotonous background displayed on the surface display, the luminance of the test spot being greater than the luminance of the background. For example, the background can be rendered dark blue, specifically with a hue of 000066 (RGB hexadecimal code). The background can also be in another dark color.

Furthermore, according to one embodiment, the central object (e.g. cross) can have a hue with the hexadecimal RGB code 1111 AA. The test spot can have a hue with the hexadecimal RGB code FFFFFF. However, other color or contrast combinations are also conceivable.

According to an embodiment of the invention, the test spot on the area display is moved within a field of interest (i.e. said path is within the field of interest and in particular defines its edges), the field of interest having four corners and a height H .

Furthermore, according to one embodiment of the invention, it is provided that the test spot is generated on the surface display in such a way that it has a diameter in the corners of the examination field that is in the range from H/4.7 to H/470, in particular in the range from H /20 to H/200, in particular in the range from H/30 to H/100, the diameter being in particular H/47, H being the height of the examination field in cm in the vertical direction.

Furthermore, according to one embodiment of the invention, it is provided that the diameter of the test spot changes automatically in relation to a distance from the central object, the diameter decreasing in the direction of the central object and having a minimum diameter in the area of the central object.

The minimum diameter of the test spot is preferably in the range from H/18 to H/1800, in particular in the range from H/75 to H/750, in particular in the range from H/125 to H/500, with the minimum diameter being H/180 in particular , where H is the vertical height of the examination field in cm.

According to one embodiment of the method according to the invention, the steps described above are preferably carried out automatically in each case, except for the person's triggering of the interaction unit, which is brought about by an action by the person. Furthermore, if necessary, the test spot can be tracked by hand by the examiner in order to precisely sound out any limits at which the visibility of the test spot changes. The processing unit can be formed by a computer (or have a computer) on which a computer program can be executed which has instructions which cause the processing unit to carry out the method steps (using the further components of the device). Insofar as a processing unit is mentioned, this also includes embodiments in which the method steps are carried out by a plurality of interacting processing units. Instead of at least one computer or at least one processing unit on which or on which a computer program is executed, the processing unit can also be formed by a hard-wired control unit.

Furthermore, according to one embodiment of the method, it is provided that the speed of the test spot is temporarily significantly slowed down by the examiner, in particular by interaction with a user interface of the device, e.g. by at least 50%, in particular by a current position at which the test spot has become invisible or has become visible again (e.g. if the position in question is traversed again with the test spot if necessary).

Furthermore, according to one embodiment of the method, it is provided that after the first measurement run along the path described above, when detecting current positions at which the test spot has become invisible or has become visible again, at least one further measurement run is carried out at the respective stored current position , in order to be able to record and visualize the said area (see above) more precisely.

Furthermore, according to one embodiment of the method, it is provided that the method also has the step: Carrying out a further measurement run for a section of the path of the (first) measurement run, which extends between two adjacent stored current positions, in which the test spot is on the Area display is moved by means of the device along a further path within an area on the area display that contains the respective section as the center, and the interaction device of the device is triggered by the person when the displayed test spot moves along the further path within the area becomes invisible at a current position for the person or becomes visible again, the device being prompted by the triggering of the interaction device to determine the respective current position of the test spot in the area and an associated store information from which it can be derived whether the test spot at the current position has become invisible to the person or has become visible again.

According to a further embodiment of the method, it is provided that after the respective further measurement run, further measurement runs are carried out for sections of the further path found in the respective area, which each extend between two adjacent stored instantaneous positions of the further path and are located on an edge of the area until a section is found that was previously found in the measurement run or in a further measurement run, with another measurement run also being carried out for this section, in which in turn the test spot on the surface display is moved along a further path by means of the device is moved within an area on the surface display that contains the section as the center, with the interaction device of the device being triggered by the person in each case when the displayed test spot moves along the further path within the area becomes invisible to the person at a current position or becomes visible again, the triggering of the interaction device prompting the device to store the respective current position of the test spot in the area and associated information from which it can be derived whether the test spot is has become invisible or visible again for the person at the current position.

According to one embodiment of the method, it is further provided that the respective area has a size of 5°, in particular 2.5°, in particular 1° around the center of the area, with the distance from adjacent parallel sections of the further path in the area being each further measurement run to one another is 2.5°, in particular 1°, in particular 0.5°.

With the optional storage of measurement results from other people, which can be stored in a database, for example, artificial intelligence (AI) can be used to identify other potential visual field failure areas of a person. Two basic Kl methods in particular can be used for this:

- a statistical analysis based on the stored current positions (e.g. in the coordinate system of the area display or other area display, in which the respective position is specified as a (x.y) coordinate pair) - e.g. using Kl Machine Learning, or

- An image analysis of the visualized examination results or areas - e.g. using Kl Deep Learning. Based on the results of the AI analysis of other people and the probability of a visual field defect compared to other people, further areas can then be checked automatically, in which potentially further visual field defects that have not yet been recognized may be present.

Accordingly, according to a further embodiment of the method, it is provided that the method has the further step of automatically selecting at least one area using a AI algorithm that has been trained with a large number of data sets from different people, with a further measurement run being carried out , in which the test spot on the surface display is moved by means of the device along a further path within the area on the surface display, with the interaction device of the device being triggered by the person if the displayed test spot during its movement along the further path inside of the area at a current position becomes invisible to the person or becomes visible again, the device being prompted by the triggering of the interaction device to store the respective current position of the test spot in the area and associated information, from which it can be derived whether the test spot at the current position has become invisible to the person or has become visible again.

Furthermore, according to one embodiment of the method, it is provided that the AI algorithm is designed to select the at least one area based on data records from different people, with the respective data record of a person containing the stored current positions of the person, or with the AI algorithm doing this is designed to select the at least one area based on data sets from different people, with the respective data set corresponding to the visualized area of a person.

Furthermore, according to one embodiment of the method, it is provided that in the case of a manual area examination, the examiner marks areas on the examination area in which further examinations are carried out automatically.

According to one embodiment of the method, it is provided that the method also has the step: Carrying out at least one further measurement run for an area selected by the examiner, the test spot on the surface display being moved by means of the device along a further path within the area on the surface display, and in each case triggering of the interaction device of the device by the person when the displayed test spot becomes invisible to the person at a current position as it moves along the further path within the area, or becomes visible again, the device being prompted by the triggering of the interaction device to store the respective current position of the test spot in the area and associated information from which it can be derived whether the test spot at the current position is invisible to the person or again has become visible.

Furthermore, according to one embodiment of the method, it is provided that the examiner carries out a manual free examination in which the test spot is controlled completely manually on the examination area (e.g. area display or further area display) by the examiner.

In this regard, according to one embodiment of the method, it is also provided that the method also has the step: carrying out at least one further measurement run, with the test spot on the surface display being moved along a further path by means of the device controlled by the examiner, and in each case triggering the interaction device of the Device by the person when the displayed test spot becomes invisible or visible again at a current position for the person as it moves along the further path within the area, the device being caused by the triggering of the interaction device to determine the respective current position of the Store the test spot in the area and associated information from which it can be derived whether the test spot has become invisible or visible again at the current position for the person.

When displaying said area of the person's field of vision on the area display and/or on another area display, the current positions stored in the further measurement runs now also form edge points of said area. This increases the accuracy of the area accordingly. In particular, to visualize the area, the current positions that were saved in the measurement run and the further measurement runs and at which the test spot has become invisible can be connected with a line that is displayed as the edge line of the area on the other area display. Alternatively or in addition, the current positions stored during the measurement run and the further measurement runs, at which the test spot has become visible, can be connected with a line that is displayed as an edge line of the area on the further area display, with the area surrounded by the edge lines in particular is displayed on the further surface display in a manner that is optically separated from the background of the further surface display.

In the measurement runs described above or further measurement runs, the

The investigator can optionally influence the relevant measurement run, e.g - a variable test spot size (e.g. start and end size of the test spot as well as a change in the test spot size),

- a speed of the test spot along the respective path,

- a direction of the path to be traversed (e.g. horizontal, vertical, diagonal)

- a number of sections of a path to be run through on the area display or other area display or in an area.

A further aspect of the invention relates to a computer program, comprising instructions which, when the computer program is executed by a computer, cause the computer or the device to carry out the steps of the method according to the invention.

According to a further embodiment of the method according to the invention, it is provided that, in particular during the measurement run, a content of the area display is transmitted to the additional area display via a data transmission connection and/or that (in particular during the measurement run) a content of the additional area display is transmitted to the area display via a data transmission connection becomes.

In the exemplary embodiments mentioned above, the data transmission connection can be a computer network connection, in particular an Internet connection, which can use one or more known network protocols. The data transmission link can also be a radio link or can be formed in sections by a radio link.

According to a further embodiment of the method, it is provided that the device has a processing unit, in particular for displaying and moving the visually detectable test spot on the surface display.

According to a further embodiment of the method, it is provided that the processing unit is a local processing unit (client) at the location of the person, with the respective current position and the associated information being stored on the local processing unit and being transmitted to a further processing unit via a data transmission connection and be evaluated on the further processing unit with generation of a result data record.

According to an alternative embodiment of the method, it is provided that the processing unit is a local processing unit (client) at the location of the person, with the respective current position and the associated information being stored on the local processing unit and being evaluated on the local processing unit with the generation of a result data record, wherein the result data record is transmitted to a further processing unit via a data transmission connection. The local processing unit can be a computer or client of the person, in particular in the form of a desktop computer, a laptop or a tablet PC. The further processing unit can be a (remote) server.

According to a further alternative embodiment of the method, it is provided that the device also has a local processing unit at the person's location, which is connected to the area display, the processing unit (in particular server) displaying and moving the visually detectable test spot on the area display via a Causes data transmission connection to the local processing unit, the respective current position and the associated information on the processing unit (server) are stored and evaluated to generate a result data set.

The local processing unit can in turn be a computer or client of the person (see above). The processing unit is preferably a (remote) server which is connected in particular to the local processing unit via a data transmission connection.

The result data record can have data that can be displayed graphically, which correspond to or code the said area of the person's field of vision.

A further aspect of the present invention relates to a computer program, comprising instructions which, when the computer program is executed on the processing unit, cause the latter or the device to carry out the steps of the method according to one of claims 22 to 25.

A further aspect of the invention relates to a computer-readable storage medium on which the computer program according to the invention is stored.

A further aspect of the invention relates to a device for measuring a person's visual field, which is set up in particular for carrying out the method according to the invention (to this extent the device can also be further developed by the individual features of the method according to the invention described herein). The device has at least: - an area display configured to be viewed by the person,

- a processing unit configured to display a check spot on the person's area display and to move it on a predefinable path on the area display,

- an interaction device configured to be triggered by the person when the indicated check spot becomes invisible or visible again to the person as it moves along the path at a current position, the processing unit being configured to be triggered on triggering the interaction device to store the respective current position and associated information from which it can be derived whether the test spot at the current position has become invisible to the person or has become visible again.

In particular, the device can be configured to carry out or be used in carrying out the steps of the method according to any one of claims 1 to 25.

According to one embodiment of the invention, the interaction device has an actuating element for triggering the interaction device. This can be, for example, one of the following actuating elements: a switch, a microphone, a touchscreen, a rotary knob, a slider.

If the area to be examined or the field of view is scanned by the test spot in such a way that the test spot alternately becomes invisible and visible again, it is sufficient if the interaction device is triggered with a single signal, which is generated, for example, by actuating one of the above-mentioned actuating elements once becomes when the visibility of the test spot changes. In this respect, a microphone is also understood as an actuating element. A signal from the interaction device can reach the processing unit in various ways and be received and processed by it. Electrical signals, electromagnetic signals, optical signals, acoustic signals, for example, are conceivable here.

Furthermore, according to one embodiment of the device, it is provided that the device is configured to generate a central object (in particular in the form of a cross) on the surface display, which can be fixed by the person using the eye to be measured. According to a further embodiment of the device, it is provided that the device has a further surface display which is configured to be viewed by an examiner,

Furthermore, according to one embodiment of the device, it is provided that the surface display is formed by a screen or has one. Furthermore, in one embodiment of the device it is provided that the further surface display for the examiner is formed by a screen or has a light source for generating an image on a projection surface.

According to a further embodiment of the device, the processing unit is also configured to determine an area of the person's visual field and to display it to the examiner on the additional surface display, with the said recorded or stored current positions forming edge points of the area.

According to a further embodiment of the device, it is provided that the device has a fixation unit which is configured to fix a head position of the person with respect to the surface display.

According to a further embodiment of the device, it is provided that the device has a further processing unit, the processing unit being configured to transmit the current positions and the associated information to the further processing unit via a data transmission connection, the further processing unit being designed to transmit the Evaluate current positions and the associated information while generating a result data set.

The result data record can have data that can be displayed graphically, which correspond to or code the said area of the person's field of vision. The surface display and interaction device can be connected to the processing unit, which is provided or can be positioned at the person's location. The further processing unit can be a remote server. The data transmission connection can be a computer network connection, in particular an Internet connection, which can use one or more known network protocols. The data transmission link can also be a radio link or can be formed in sections by a radio link. Furthermore, the additional area display can be connected to the server or to a client that is connected to the server via a computer network connection. The embodiment described above thus enables a patient to carry out the measurement run on his local area display at home and to send the corresponding data (current positions and associated information) to a remote server for evaluation.

According to a further embodiment of the device, it is provided that the device has a further processing unit, the processing unit being configured to store the current positions and the associated information Evaluate the generation of a result data record and transmit the result data record via a data transmission connection to the further processing unit.

The result data set can in turn have data that can be displayed graphically, which correspond to or encode the said area of the person's visual field. The surface display and interaction device can be connected to the processing unit, which is provided or can be positioned at the person's location. The further processing unit can be a remote server. The data transmission connection can in turn be a computer network connection, in particular an Internet connection, which can use one or more known network protocols. The data transmission link can also be a radio link or can be formed in sections by a radio link. Furthermore, the additional area display can be connected to the server or to a client that is connected to the server via a computer network connection. The present embodiment also enables the patient to carry out the measurement run on his local area display at home, with the measurement data (current positions and associated information) also being evaluated locally and only the result data set being transmitted to the remote server or to the examiner.

According to a further embodiment of the device, the device also has a local processing unit at the person's location, which is connected to the area display, the processing unit (in particular server) displaying and moving the visually detectable test spot on the area display via a data transmission connection to the local Processing unit causes, the respective current position and the associated information on the processing unit (server) are stored and evaluated to generate a result data set.

Here, too, the results data record can have data that can be represented graphically, which correspond to or encode the said area of the person's field of vision. The surface display and interaction device can be connected to the local processing unit, which is provided or can be positioned at the person's location. The processing entity may be a remote server. The data transmission connection can be a computer network connection, in particular an Internet connection, which can use one or more known network protocols. The data transmission link can also be a radio link or can be formed in sections by a radio link. Furthermore, the additional area display can be connected to the server or to a Client connected to the server via a computer network connection. The embodiment described above thus enables the patient to carry out the measurement run on his local area display at home. The measurement run is carried out and evaluated on the server. The patient can, for example, use his local processing unit via a web browser to access an internet page that forms a user interface for carrying out the measurement run. A corresponding application can be run on the server.

Furthermore, the device according to the invention can be further developed by the features described above in connection with the method.

Area displays are characterized in particular by the fact that they have essentially flat surfaces for the graphic display.

Embodiments of the present invention and further features and advantages of the invention are to be explained below with reference to the figures. Show it:

1 shows a schematic representation of an embodiment of a device according to the invention,

2 shows a representation of a path that is traversed by the test spot in a method according to the invention,

Fig. 3 shows a schematic representation of the optic nerves for comparison with the sections of the path shown in Fig. 2,

4 shows a representation of the detected or stored instantaneous positions of the test spot at which it changes its visibility,

5 shows a colored highlighting of the area of the field of view of a person measured according to FIG.

6 shows a representation of a further path that can be followed by the test spot in a method according to the invention,

7 shows a schematic representation of an embodiment of a device according to the invention, which is particularly suitable for telemedicine purposes,

8 shows a schematic representation of the instantaneous positions recorded during a first measurement run, at which the test spot has become invisible or visible again, 9 shows a schematic representation of a further measurement run in a reduced area, the center of which corresponds to a failure previously detected during a first measurement run,

10 shows a schematic representation of a further measurement run in a reduced area, the center of which corresponds to a failure previously detected in an area,

11 shows a schematic representation of a further measurement run in a reduced area, the center of which corresponds to a further failure recorded in the first measurement run,

12 shows a schematic representation of further measurement runs in two reduced areas, which were selected using a KI algorithm that was trained using patient data,

13 shows a schematic representation of further measurement runs in two reduced areas which have previously been determined by the examiner, and

14 shows a schematic representation of a further measurement run, in which the test spot is moved along a further path that is defined, for example, in real time by the examiner.

The method according to the invention is also referred to below as rapid campimetry (RAP CAMP or RAP-CAMP). According to one embodiment, for example using a device according to FIG Area display 2 of the device 1, with a spatial position of the head of the person P in relation to the area display 2 remaining unchanged, o moving the test spot 6 on the area display 2 by means of the device 1 along a path 7 during a measurement run and triggering an interaction device 8 of the device 1 the person P when the displayed test spot 6 becomes invisible or visible again for the person P as it moves along the path 7 at a current position 9 (cf. FIG. 4), the device 1 doing this by triggering the interaction device 8 is caused, the respective current position and an associated In to store information from which it can be derived whether the test spot 6 has become invisible or visible again for the person P at the current position, and o Displaying an area 90 of the visual field of the person P on a further surface display 3, with the said current positions 9 forming edge points of the area 90.

This can directly result in decisive advantages of the method according to the invention or individual embodiments of the method:

- A multiplication of the test spots 6 and acceleration of the examination.

- In the 10° area of the field of vision, it is possible to test at several hundred to several thousand instead of 16 or 25 points (as with modern computer perimeters), which improves the ability to detect absolute scotomas.

- Concentration and cooperation with the patient can be easily practiced for about 1 minute. This makes the information provided by the patient more reliable.

- The usability of the method increases, since approx. 1 minute can be integrated into a routine examination, in contrast to perimetry

- the RAP-CAMP becomes an easy-to-use screening method for absolute scotomas.

- Any patient with suspected normal tension glaucoma can be examined. Approximately 0.3% of the population over 40 in Germany has normal pressure glaucoma.

- Risk factors for normal tension glaucoma are myopia and migraine.

Migraine frequency in Germany is about 1%. Every patient over 40 years of age with myopia and migraine should be examined. The frequency of the diagnosis of normal tension glaucoma will increase because scotomas can be found more quickly and reliably and more patients are examined.

- Glaucoma patients (approx. 1% of the population over 40 in Germany) can easily be checked more frequently.

However, the method described here is in particular not a diagnostic method, but merely a measuring method which, in particular, does not include a diagnostic step, but in particular merely carries out a measurement of the visual field.

According to one embodiment, the method according to the invention can be carried out, for example, with the following steps:

■ The patient sits at a distance A of 40 cm, for example, in front of the surface display 2 in the form of a screen.

■ The head of the patient P is fixed via a fixation unit 4 having a chin and forehead rest. A bright white test spot 6 runs in rapid succession across the otherwise dark screen 2.

■ The test spot 6 runs through the field of view horizontally, vertically and diagonally, so that a grid of quadrants is covered by the test method.

■ As soon as the test spot 6 becomes invisible to the patient P and later becomes visible again, the patient P signals the change in each case.

■ At the end of the examination, all instantaneous positions 9 of the test spot recorded in this way, at which the test spot 6 became invisible (off points) or became visible again (on points) are connected to one another in a preliminary connection in such a way that an area 90 of the visual field , which can correspond to a visual field failure, becomes recognizable (cf. FIG. 4).

■ The visual field loss can then be specified more precisely with a kinetic perimetry.

FIG. 1 shows an embodiment of a device 1 for measuring the visual field of a person P, which is suitable for carrying out the method according to the invention. The device 1 has an area display 2 which is configured to be viewed by the person P. FIG. The device 1 also has a further surface display 3 which is configured to be viewed by an examiner U, and optionally a fixation unit 4 which is configured to fix a head position of the person P with respect to the surface display 2 . The device 1 also has a processing unit 5 (eg in the form of a computer), which is configured to display a test spot 6 on the area display 2 of the person P and to move it along a predefinable path 7 on the area display 2 . The device 1 further has an interaction device 8 which is configured to be triggered by the person P when the displayed test spot 6 becomes invisible to the person P or becomes visible again as it moves along the path 7 at a current position 9 , wherein the processing unit 5 is configured to store the respective current position 9 and associated information when the interaction device 8 is triggered, from which it can be derived whether the test spot 6 at the current position 9 has become invisible for the person P or has become visible again is (see Fig. 4). The processing unit 5 is also configured to display an area 90 of the visual field of the person P on the additional area display 3 , with the said current positions 9 forming edge points of the area 90 . The fixation unit 4 can have a chin and forehead rest, for example, on which the patient P can rest his chin. A holder for the possible use of spectacle lenses that may be required can be provided in front of this.

The surface display 2 is preferably designed in the form of a screen and is arranged at a fixed distance A from the uncovered eye of the patient P. The interaction device 8 can be operated by the patient, e.g.

Furthermore, a fixation control unit can be provided, which ensures that the patient P fixes a central object 10 (e.g. a cross) with the eye to be examined. The fixation of this central fixation cross 10 is preferably checked by the examiner U and adjusted precisely at the beginning of the examination (e.g. by means of a corneal reflex or pupil image). If there is a deviation from the central fixation 10, the test spot run is preferably automatically stopped by the fixation control unit.

The area display 2 or the screen 2 preferably differs completely from any usual perimetry and campimetry. It preferably has the following properties:

- The surface display 2 is darkened and has a dark blue hue, for example; other dark colors are also possible.

- The distance between the patient P's eye and the surface display or screen 2 is set to 40 cm, for example. Accordingly, the campimetry according to the invention is carried out in the central 10° area with a grid size of 14.1 cm (vertical) to 15° with a grid size of 21.4 cm (horizontal). All early failures of glaucoma and also the blind spot F (cf. FIG. 3), which can make it clear to the patient that the test spot has disappeared, are in this area.

FIG. 3 schematically shows the course of the nerve fibers N at the fundus of the eye. The square corresponds to the central 10° field of view G. Also shown is the point S of sharpest vision. The circles BS show an example of the course of an arcuate scotoma.

According to an example of the invention, the test spot 6 is bright white. Unlike in the hemispherical perimeter, there is no addition of the luminance (surroundings + test spot). The light test spot replaces the dark background.

The central object 10 (eg the central cross) serves as a fixation point, see above. It is therefore preferably clearly visible in order to easily enable fixation, but on the other hand it should not be too bright and dazzle the patient P. It is therefore preferred weaker in light than the test spot 6 and can, for example, have a light blue hue (other colors are also possible).

The size or the diameter of the test spot 6 can preferably be set variably and can be adapted as required with a view to the patient being examined. According to one example, the diameter of the test spot can be 2 mm, corresponding to a range of 0.3° in the field of view. For certain applications, a test spot of 2.5 mm (range of 0.4° in the field of view) may be necessary if the test area is more than 10° from the center, since visual acuity decreases towards the periphery. Patients with poor visual acuity should also be able to be examined. A test spot that is only 1 or 1.5 mm in size would enable a more precise examination as long as it is easily perceptible. However, the tester can also be larger. The device 1 is preferably designed in such a way that the test spot 6 becomes larger as the distance from the center 10 increases.

One of the significant differences to all visual field examination methods of the prior art is the running speed of the test spot 6. This moves comparatively quickly through the visual field of the patient 6. The perceptibility of the test spot 6 can therefore be measured at many points in a short time. For example, according to an example of the invention, 3750 points in the 10° range can be checked in 30 seconds. Depending on the program, modern computer perimeters check in the 10° range at 16 to 25 points. However, the inspection speed of the present invention may be, for example, 125 frames per second. In the method according to the invention and the device 1 according to the invention, the running speed of the test spot 6 can be adjusted based on the individual requirements of the patient being examined.

FIG. 2 illustrates a possible path 7 that the test spot 6 follows during a measurement run due to a corresponding configuration or design of the device 1.

According to one embodiment of the invention, the device 1 is designed to let the test spot 6 run on a path 7, initially from right to left along six vertical sections 70, in particular alternating from top to bottom and from bottom to top and then along four horizontal sections 71. The length of path 7 may be, for example, about 130 cm on area display 2. If a test spot speed of 3 cm/s is used, the example results in an inspection time of less than 1 minute.

FIG. 5 shows an alternative configuration of the path 7. Here the test spot 6 is first guided from right to left along four vertical sections 70, in particular alternating from top to bottom and from bottom to top. Thereafter, the test spot 6 is guided along four sections 72 which are inclined with respect to the vertical and thereby cross, for example, the 5° circle and/or the 10° circle, in particular orthogonally to the respective circle. This proves to be advantageous since the nerve fibers N of the optic nerve (cf. FIG. 3) are thereby cut as perpendicularly as possible.

The further surface display 3 or the further screen 3 of the examiner U preferably also has a central object/cross 10 which corresponds to the fixation point 10 of the patient on the screen 2 . In addition, the 5°, 10° and 15° circles for the dimension of the field of view are preferably displayed.

The two surface displays/screens 2, 3 are, in particular, coupled to one another and cooperate, with the test spot 6 running over the other screen 3 so that the examiner U can also see it. If the patient P signals the disappearance or reappearance of the test spot 6, then these locations or current positions 9 (cf. FIG. 4) are marked on the screen 3 of the examiner U.

At the end of the examination, all positions or points 9 at which the test spot 6 became invisible (off points) or became visible again (on points) are connected to one another in a preliminary connection by the processing unit 5 of the device 1 in such a way that a probable form of the field of vision failure can be identified, as shown in FIG. 4 by way of example. The predetermined probability of a visual field failure can be verified as in kinetic perimetry by moving the test spot (cursor like test mark) from the area of invisibility to the area of becoming visible. This movement of the test spot, controlled by the examiner U, is controlled by the examiner U, e.g. via input means 11, in particular direction keys of the computer or the processing unit 5. The device or processing unit 5 can also be designed to automatically visualize said area 90 or the suspected visual field defect at the end of the examination, as shown in FIG. 5 .

During the measurement run, the patient P can signal in various ways that the visibility of the test spot 6 has changed, e.g. by pressing a button, speaking, etc. The interaction device 8 provides a corresponding input means for this purpose.

The position 9 of the failures signaled by the patient P is stored by the device 1 . After a first measurement run, the areas signaled by the patient P can be specified manually by the examiner. Such a more precise definition of the suspected visual field defect 90 takes place, for example, by approaching the approximate point of the visibility change again more slowly after the first measurement run and with a focus on the defect areas signaled by the patient P. In principle, the method according to the invention is also suitable for configuration as a telemedical method. For example, the measurement run or the examination can be carried out via the Internet. A patient P can be examined if he has only one computer in has his premises, the examiner U can carry out the measurement run remotely if necessary. Experienced patients in particular, e.g. glaucoma patients, who have already been examined several times, know the examination procedure, which could therefore also be repeated autonomously if necessary (cover one eye, keep a distance of e.g. 40 cm, fixate on the central object 10, e.g. when the test spot disappears).

Auxiliary staff would not be required. A patient could, for example, collect his findings at regular intervals and send them to his doctor (examiner U). In other parts of the world where perimeters do not exist, campimetry results could be collected and sent via the Internet via a support person who is trained in the examination technique.

FIG. 1 shows a further embodiment of a device 1 for measuring the visual field of a person P, which is suitable for carrying out the method according to the invention and also does not require an examiner U to be present at the patient P's location.

In this case, the device 1 has a surface display 2 which is configured to be viewed by the person P. FIG. The surface display (especially screen) 2 is connected to a local processing unit (e.g. in the form of a computer) 5, which in turn is connected to an interaction device 8, which can be e.g. a keyboard or a microphone of the computer. The local processing unit 5 is connected via a data transmission connection V (e.g. an Internet connection) to a further processing unit 55, which is e.g. a server. A further surface display 3 and a keyboard 11 for an examiner U can be provided on the server side. With regard to the measurement run, there is now the possibility of implementing this using a computer program that is executed on the local processing unit 5 . The measurement data (current positions and associated information) can be stored on the local processing unit 5 and evaluated while generating a result data set. The result data set can be transmitted to the server 55 or to the examiner U via the data transmission connection V. Alternatively, there is also the possibility of transmitting the measurement data to the server 55 and evaluating them there while generating the result data set.

Furthermore, there is the possibility that the measurement run is implemented using a computer program that is executed on the further processing unit 55 (eg server), eg as a browser-based application. The patient can access this application via the data transmission or Internet connection V and the measurement data collected during the measurement process can be stored on the server 55 and evaluated there, generating the results data record. In the aforementioned process variants, the result data record can have data that can be represented graphically, which correspond to or encode said area 90 of the person's visual field (cf. FIGS. 4 and 5). This area 90 can be shown to the patient, for example, via the surface display 2 or to the distant examiner U via the further surface display 3 .

The examiner U can communicate with the patient P in particular during the measurement run. Such (e.g. audiovisual) communication between the patient and the examiner (e.g. in the form of a video chat) can also be implemented via a data transmission connection V between the two processing units 5, 55 or in some other way.

The various refinements of the embodiment according to FIG. 5 thus advantageously enable the patient to carry out the measurement run on his local area display at home. The patient can be guided or accompanied by the examiner in real time, if necessary.

Furthermore, according to one embodiment of the method according to the invention and the corresponding device, it is provided that after the first measurement run along the defined path described above, if a visual field failure is detected (i.e. in the event that current positions 9 are recorded at which the test spot is invisible and then becomes visible again) further, optional detailed examinations or further measurement runs can be carried out, which scan any detected visual field defects more precisely. This can be done in the manner described above (e.g. for a smaller area 92), in particular (partially) automated (see Fig. 9 to 11), and also with the support of methods based on artificial intelligence (K1) (see Fig .12). Furthermore, a manual area examination (cf. FIG. 13) or even a manual free examination (cf. FIG. 14) can be carried out.

In detail, for example, sections 91 along the path 7 recognized during the first measurement run or standard run, which extend between two consecutive instantaneous positions 9, at which the test spot 6 becomes invisible or visible again for the person P being examined, by area tests all around the relevant section 91 (potential scotoma area) can be automatically further detailed and specified by using the following method steps, for example:

An area 92 is defined around the sections 91 (potential scotoma or defect areas) detected during the first measurement run (cf. FIG. 8), through which the test spot is guided along a further path 70, with the current positions 9 being recorded again , at which the test spot 6 becomes invisible or becomes visible again (cf. FIG. 9). After a further measurement run along the further path 70 in the relevant area 92, the sections 91 located at the edge of the area 92 (new potential failure areas) are used as the center for further areas 92 and these areas 92 are run through again until an overlap with another , in the first measurement run or in the further measurement runs detected section 91 (potential scotoma area) is present. This section 91 is also selected as the center of an area 92 that is traversed according to the same principle (see FIGS. 9 to 11).

As an alternative to this procedure, the sections 91 (or potential scotoma or defect areas) identified during the first measurement run (cf. FIG. 8) can each be used as the center of an area 92 in which the test spot 6 is guided along a further path 70 , the current positions 9 at which the test spot 6 becomes invisible or visible again for the person P being examined are in turn stored (see FIGS. 9 and 11).

In particular, the areas 92 have an area that is smaller than the area that the path 7 sweeps over during the first measurement run. In particular, the respective area 92 can cover an area around the respective center (section 91) which corresponds to a viewing angle of 5°, in particular 2.5°, in particular 1°, the distance between adjacent parallel sections 70a of the further path 70 being 2, 5°, in particular 1° in each case, in particular 0.5° in each case.

With regard to the further measurement runs, patient data from other people can also be used, for example in order to train a KI algorithm. In this way, potential areas of failure or sections 91 can be identified which have not been found with the previous examination methods. Two basic AI methods can be used for this, namely on the one hand the statistical analysis based on the stored instantaneous positions 9 in the coordinate system of the examination area (e.g. (x,y) coordinates in the coordinate system of the area display or other area display, and on the other hand an image analysis of the visualized examination results, ie, for example, the area 90, the edges of which are formed by the positions 9. Based on the results of the KI analysis of other people and the probability of a potential defect/scotoma compared to other people, other areas 92 can be checked automatically , in which there may potentially be further, not yet recognized sections 91. To this end, as described above, further measurement runs can be carried out in areas 92 determined by the AI (cf. FIG. 12). Furthermore, the respective area 92 can also be specified by the examiner, after which an (automatic) further measurement run can be carried out along a further path 70 in the manner described above (see FIG. 13).

Finally, there is also the possibility that the examiner defines or controls the further path 70 for the further measurement run in real time (see FIG. 14).

In all of the examination methods and further measurement runs described above, the examiner can optionally influence or set the following examination parameters, i.e. in particular:

A size or a diameter of the test spot 6 (e.g. start and end size of the test spot 6 and, if necessary, a change in size or its rate),

A speed of the moving test spot 6,

A direction of the path to be traversed 7, 70 (e.g. horizontal, vertical, diagonal etc.)

A number of sections 70a of a path 7, 70 to be traversed in an area 92 or on the area display or the further area display.

Claims

patent claims

Claims 1. A method for measuring the visual field of a person (P) by means of a device (1), comprising the steps of: Displaying a visually detectable test spot (6) on a field viewed by the person (P) using one of the person's (P) eyes Area display (2) of the device (1), wherein a spatial position of the head of the person (P) with respect to the area display (2) remains unchanged, and o moving the test spot (6) on the area display (2) by means of the device (1) along a path (7) during a measurement run and triggering of an interaction device (8) of the device (1) by the person (P) if the displayed test spot (6) moves along the path (7) at a current position (9) becomes invisible for the person (P) or becomes visible again, the device (1) being caused by the triggering of the interaction device (8) to store the respective current position and associated information from which it can be derived whether the Test spot (6) has become invisible or visible again at the current position for the person (P).

2. The method according to claim 1, wherein the method comprises the further step:

Displaying information and/or an area (90) of the visual field of the person (P) on the surface display (2) and/or on another surface display (3), the said current positions forming edge points of the area (90).

3. The method according to claim 1 or 2, wherein the test spot (6) when moving on the surface display (2) has a speed S/f in cm/s, where S is the distance covered by the test spot in cm, and where f is a number is in the range from 2 to 7, in particular in the range from 3 to 6, in particular in the range from 4 to 5, where f is in particular 4.7.

4. The method according to any one of claims 1 to 3, wherein the eye of the person (P) when moving the test spot (6) along the path (7) has a distance (A) to the surface display (2) which is in a range of 10 cm to 400 cm, in particular in a range from 20 cm to 200 cm, in particular in a range from 30 cm to 100 cm, in particular in a range from 30 cm to 50 cm, in particular in a range from 35 cm to 45 cm, the distance being in particular 40 cm. Method according to one of the preceding claims, wherein during the measurement run within a period of 1 minute at least 500 to 50000 different points of the pixel area display are checked in the field of view by means of the test spot (6), in particular at least 1000 to 25000 different points, in particular at least 1500 to 10000 different locations, in particular at least 2500 different locations, and/or wherein the path (7) has an overall length of at least 17.625 cm to 705 cm, and/or wherein the path (7) has an overall length of at least 35.25 cm to 352.5 cm cm, and/or wherein the path (7) has an overall length of at least 52.875 cm to 176.25 cm, and/or wherein the path (7) has an overall length of at least 70.5 cm, the test spot (6) travels the entire path (7) within a period of less than or equal to 1 minute during the measurement process. Method according to one of the preceding claims, wherein the path (7) has a plurality of first sections (70) parallel to one another, and/or wherein the path (7) has a plurality of second sections (71) parallel to one another. Method according to claim 6, wherein the first sections (70) cross the second sections (71), so that in particular the first and second sections define a grid. Method according to one of Claims 6 to 7, in which the test spot (6) is first moved along the first sections (70) in each case and then along the second sections (71) in each case. A method according to any one of claims 6 to 8, wherein the first sections (70) run vertically on the faceplate (2) and the second sections (71) run horizontally on the faceplate (2); or wherein the first sections run horizontally on the area display and the second sections run vertically on the area display. Method according to one of the preceding claims, characterized in that the path (7) has at least one section (72) which runs along the vertical runs or inclines to the vertical; and/or that the path (7) has at least one section that runs in an arc, in particular in the shape of a semicircle; and/or that the path (7) has at least one section (72) which crosses nerve fibers (N) and in particular runs orthogonally to the nerve fibers (N). Method according to Claim 2 or according to one of Claims 3 to 11 if related back to Claim 2, the current positions (9) at which the test spot (6) has become invisible being connected with a line to visualize the region (90), which is displayed as an edge line of the area (90) on the further area display (3), and/or that the current positions at which the test spot (6) has become visible are connected with a line which is used as an edge line of the area (90 ) is displayed on the further surface display (3), in particular the area (90) surrounded by the edge lines being displayed on the further surface display (3) in a manner that is optically separated from the background of the further surface display (3). A method according to claim 2 or any one of claims 3 to 11 when appended to claim 2, wherein the detected area (90) is checked by repeatedly controlling the test spot (6) by an examiner (U) under observation of the person (P). is guided on the surface display (2) out of the detected area (90) into a surrounding area in which the test spot (6) is visible to the person. Method according to one of the preceding claims, wherein a central object (10) is displayed on the surface display (2) during the measurement run, in particular in the form of a cross, which is weaker in light than the test spot (6), and which is used to fix a line of sight of the person (P) is viewed by the person (P), with the device (1) detecting during the measurement run whether a viewing direction of the person (P) deviates from the central object (10), and if a deviation is detected, the movement of the test spot (6 ) stops, with the test spot (6) in particular having a diameter which becomes smaller as the distance from the central object (10) decreases. The method according to claim 3 or one of claims 4 to 13 as far as dependent on claim 3, wherein the speed of the test spot (6) is temporarily slowed down by the examiner, in particular by interaction with a user interface of the device (1), in particular by a momentary To specify the position at which the test spot (6) has become invisible or has become visible again. Method according to one of the preceding claims, the method further comprising the step of: performing a further measurement run for each section (91) of the path (7) of the measurement run which extends between two adjacent stored instantaneous positions (9), in which respectively the test spot (6) on the area display (2) is moved by means of the device (1) along a further path (7) within an area (92) on the area display which contains the respective section (91) as a centre, and respectively Triggering of the interaction device (8) of the device (1) by the person (P) when the displayed test spot (6) in its movement along the further path (70) within the area (92) at a current position (9) for the Person (P) becomes invisible or becomes visible again, the device (1) being caused by the triggering of the interaction device (8) to determine the respective current position (9) of the test spot (6) in the area (92) and associated information from which it can be derived whether the test spot (6) at the current position (9) has become invisible for the person (P) or has become visible again. Method according to Claim 15, wherein after the respective further measurement run for sections (91) of the further path (70) found in the respective area, which each extend between two adjacent stored current positions (9) of the further path (70) and at one edge of the area (92), further measurement runs are carried out until a section (91) is detected that was previously found during the measurement run or in a further measurement run, with another measurement run also being carried out for this section (91). . The method according to any one of claims 1 to 14, wherein at least one area (92) is selected automatically by means of a Kl algorithm that has been trained with a large number of data sets from different people, with a further measurement run being carried out in which the test spot (6) is moved on the surface display (2) by means of the device (1) along a further path (70) within the area (92) on the surface display, with the interaction device (8) of the device (1) being triggered by the Person (P) takes place when the displayed test spot (6) further along as it moves Path (70) within the area at a current position (9) for the person (P) becomes invisible or becomes visible again, the device (1) being caused by the triggering of the interaction device (8) to change the current position ( 9) of the test spot (6) in the area (92) and associated information from which it can be derived whether the test spot (6) at the current position has become invisible for the person (P) or has become visible again. The method of claim 17, wherein the Kl algorithm is designed to select the at least one area (92) based on data records from different people, the respective data record of a person comprising the stored current positions (9) of the person, and/or wherein the Kl algorithm is designed to select the at least one area (92) based on data sets from different people, with the respective data set corresponding to the visualized area (90) of a person. Method according to one of the preceding claims, wherein the method further has the step: carrying out at least one further measurement run for an area selected by the examiner, the test spot (6) on the surface display (2) being traced by means of the device (1) along a further path ( 7) is moved within an area on the surface display, and the interaction device (8) of the device (1) is triggered by the person (P) if the displayed test spot (6) moves along the further path (7) within the Areas at a current position (9) for the person (P) is invisible or visible again, the device (1) by triggering the interaction device (8) is caused to the respective current position of the test spot in the area and a to store associated information from which it can be derived whether the test spot (6) at the current position for the person (P) is invisible or visible again has become. Method according to one of the preceding claims, wherein the method further comprises the step: carrying out at least one further measurement run, wherein the test spot (6) on the surface display (2) controlled by the examiner by means of the device (1) along a further path (70) is moved, and in each case the interaction device (8) of the device (1) is triggered by the person (P) if the displayed test spot (6) is at a current position during its movement along the further path (70) within the area (9) becomes invisible to the person (P) or becomes visible again, with the device (1) being prompted by the triggering of the interaction device (8) to store the respective current position of the test spot in the area and associated information, from which it can be derived whether the test spot (6) has become invisible or visible again at the current position for the person (P). Method according to Claim 2 or one of Claims 3 to 20 insofar as dependent on Claim 2, in which a content of the area display (2) is transmitted to the further area display (3) via a data transmission connection (V) and/or in which a content of the further area display ( 3) is transmitted to the surface display (2) via a data transmission connection (V). Method according to one of the preceding claims, wherein the device (1) has a processing unit (5, 55), in particular for displaying and moving the visually detectable test spot (6) on the surface display (2). Method according to claim 22, wherein the processing unit (5) is a local processing unit at the location of the person (P), and wherein the respective current position and the associated information are stored on the local processing unit (5) and transmitted via a data transmission connection (V). be transmitted to a further processing unit (55) and evaluated on the further processing unit (55) while generating a result data set. Method according to claim 22, wherein the processing unit is a local processing unit at the location of the person (P), and wherein the respective current position and the associated information are stored on the local processing unit (5) and on the local processing unit (5) to generate a Result data set are evaluated, the result data set is optionally transmitted via a data transmission connection (V) to a further processing unit (55). Method according to claim 22, wherein the device (1) further comprises a local processing unit (5) at the location of the person (P) which is connected to the area display (2), the processing unit (55) being able to display and move the visually detectable test spot on the area display (2) via a data transmission connection (V) to the local processing unit (5), the respective current position and the associated information being stored on the processing unit (55) and evaluated to generate a result data set. Computer program, comprising instructions which, when the computer program is executed on the processing unit, cause the latter to carry out the steps of the method according to one of Claims 22 to 25. Device (1) for measuring the visual field of a person (P), comprising: an area display (2) configured to be viewed by the person (P), a processing unit (5, 55) configured to to display a test spot (6) on the area display (2) of the person (P) and to move it along a predefinable path (7) on the area display (2), an interaction device (8) which is configured to be activated by the person (P ) to be triggered when the displayed test spot (6) becomes invisible or visible again as it moves along the path (7) at a current position for the person (P), the processing unit (5) being configured to, at a Triggering the interaction device (8) to store the respective current position and associated information from which it can be derived whether the test spot (6) at the current position for the person (P) has become invisible or has become visible again. A device according to claim 27, wherein the device (1) comprises a further area display

(3) configured to be viewed by an examiner (U). Apparatus according to claim 28, wherein the processing unit (5) is further configured to display an area (90) of the visual field of the person (P) on the to display a further area display (3), said current positions (9) forming edge points of the area (90). Device according to one of claims 27 to 29, wherein the device (1) has a fixation unit (4) which is configured to fix a head position of the person (P) with respect to the surface display (2). Device according to one of Claims 27 to 30, wherein the device (1) has a further processing unit (55), and wherein the processing unit (5) is configured to transmit the current positions and the associated information via a data transmission connection (V) to the further To transfer processing unit (55), wherein the further processing unit (55) is designed to evaluate the current positions and the associated information to generate a result data set. Device according to one of Claims 27 to 30, wherein the device (1) has a further processing unit (55), and wherein the processing unit (5) is configured to evaluate the current positions and the associated information while generating a result data record and the result data record via to transmit a data transmission connection (V) to the further processing unit (55). Device according to one of claims 27 to 30, wherein the device further comprises a local processing unit (5) at the location of the person (P), which is connected to the surface display (2), the processing unit (55) displaying and moving the visual detectable test spot on the surface display (2) via a data transmission connection (V) to the local processing unit (5), with the respective current position and the associated information being stored on the processing unit (55) and evaluated while generating a result data set.