JPH043214B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to an automatic visual field measurement device that presents an optotype according to a predetermined program, and more specifically, to an automatic visual field measuring device that presents an optotype according to a predetermined program, and more specifically, an automatic perimetry device that presents an optotype according to a predetermined program, and more specifically, an automatic perimetry device that presents an optotype according to a predetermined program. The present invention relates to an automatic perimetry device that can additionally present an arbitrary visual field after completion.

[Conventional technology]

In the above-mentioned conventional automatic perimetry device, the optotypes that are additionally presented during or after the index presentation according to the predetermined program are the optotype arrangement pattern displayed on the TV monitor, that is, the optotypes are additionally presented.
The area containing the optotype was specified and inputted by surrounding it with a light pen.

[Problem that the invention seeks to solve]

The designation of the optotype for additional presentation in the conventional automatic perimetry device described above is not performed immediately after being input to the TV monitor with a light pen, but is displayed on the TV monitor only after the specified optotype is presented. However, there was a problem in that the measurer was unable to know whether the input using the light pen was desired before presenting the optotype and correct the input if necessary.

The present invention was made in view of the above problem, and when the measurer inputs an optotype to be additionally presented or an area including the optotype using a light pen, the input is immediately displayed on the TV monitor. The purpose of the present invention is to provide an automatic visual field measuring device.

The present invention also clearly shows the trajectory of the light pen, that is, the scanning area, by displaying it differently from the non-scanning area, for example, using a different color display or black and white inverted display, and furthermore, by erasing the optotype display in the scanning area, the scanning area is different from the scanning area. It is an object of the present invention to provide an automatic perimetry device that can clearly display whether or not a visual target near the boundary of a scanning area is additionally presented.

[Means to solve problems]

The present invention has the following structural features in order to solve the above problems. That is, the present invention includes an optotype presenting means 1 for presenting an optotype for visual field measurement, a presentation condition storage means 2 for storing optotype presentation conditions, and an optotype presentation condition read from the presentation condition storage means 2. a presentation control means 3 for causing the optotype presenting means 2 to present the optotypes, a TV monitor 4 for displaying the device pattern of the optotypes, and a display control means 3 for causing the optotype presentation means 2 to present the optotypes, and a TV monitor 4 for displaying the device pattern of the optotypes; and a TV monitor control means 5 for forming a signal constituted by a bright background and a scotoma optotype and outputting it to the TV monitor, and a light pen 6, and forming an optotype addition command signal and an optotype presentation restart command signal. and an operation command means 7, and when the operation command means 7 issues an optotype addition command signal,
The TV monitor control means 5 generates a signal for displaying the optotype pattern as a bright background and a dark spot optotype, and displays the optotype pattern on the TV.
The light pen 6 is output to the monitor 4, and then the scanning locus of the light pen 6 on the TV monitor 4 is controlled to be a dark area.Furthermore, when the operation command means 7 issues an optotype presentation restart command signal, The TV monitor control means 5 forms a signal for displaying the optotype pattern with a dark background and bright spot optotype and outputs it to the TV monitor 4, while the presentation control means 2 controls the light pen 6.
This is an automatic perimetry apparatus characterized in that the optotype presenting means 1 is controlled to present an optotype included in a dark area indicating a scanning locus.

〔Example〕

Embodiments of the present invention will be described below based on the drawings. The automatic perimetry device, as shown in Figure 2,
Housing 10, circular hole 12 for inserting the face of the person to be measured
a panel 14 and a recognition switch 16 attached to the front side of the housing 10 with It also has an operation display device 26 attached to the side wall 24 of the housing 10. A lower side wall near the front of the panel 14 has a handle 28 for moving the fixed part 22 to be measured vertically and horizontally.
A hemispherical dome 30 having a large number of LEDs 29 arranged as optotypes over the entire inner surface is built into the housing 10 to present an optotype.

The operation display device 26 includes a TV monitor 32 and a light pen 34, a printer 36 located below the TV monitor 32, a control switch 38 located above the TV monitor, and a fixed vision monitoring telescope 4.
Consists of 0. Hemispherical dome 30 is on the TV monitor 32
The type and distribution of the optotypes presented, as well as a plurality of operation commands to be described later, are displayed on the inner surface of the screen, and the apparatus is operated by selecting an operation command using the light pen 34 and the control switch 38.

Printer 36 prints the measurement results. In the fixation monitoring telescope 40, the eye to be examined is the hemispherical dome 30.
This system monitors from the front whether or not the patient is gazing at a fixation target (not shown) placed at the center of the spherical surface of the eye. Monitor the eyes.

Next, the configuration of this embodiment will be explained based on FIG. 3. The I/O interface 100 is provided with output signals from the light pen 34 and control switch 38 operated by the measurer, and whether or not the person to be measured recognizes the visual target or the number of visual targets recognized, based on the number of operations. A recognition signal from input recognition switch 16 is input and converts the input signal into a signal suitable for processing by the internal apparatus and converts the measurement result into a signal suitable for printing on printer 36. Although the explanation here assumes that the person to be measured operates the recognition switch 16 himself, the measurer may receive the recognition from the person to be examined and input it using a light pen.

The CPU 102 performs the main control of this device, and performs various timing controls in addition to the content that will be explained later using a flowchart.

The LED matrix interface 120 is
This is an ink face for lighting up the LED 29 under predetermined conditions according to the optotype presentation conditions read out by the CPU 102, and constitutes a matrix of at least two transistor arrays.

The presentation condition storage unit 104 stores the LED of the dome 30.
The optotype presentation conditions that determine how the 29 is to be lit, that is, combinations of lighting, brightness (intensity), position, lighting time, etc., are stored as a visual field measurement program. The types of perimetry programs stored here include perimetry programs for measurement purposes such as screening and glaucoma testing, but as will be described later, there are two types of perimetry programs for each, one for the right eye and one for the left eye. It's not that there are any, but only one type of each.

The presentation condition storage unit 104 assumes a matrix for each of the two left and right divided visual fields on the temporal side and the nasal side, and stores the position data of the visual target among the visual target presentation conditions as a matrix number for each matrix.

The response storage unit 106 stores the recognition signal from the recognition switch 16, which inputs whether or not the subject recognized the index or the number of visual targets recognized as the number of operations, as the subject's response and stores the visual target presentation conditions at that time. Remember it in relation to. Through this, data regarding the visibility of the subject is obtained.

The GDC (graphic display controller) 108 is, for example, NEC (registered trademark) μPD7220.
It is commercially available under the name , and the LED array signal, the selected measurement program signal, the signal indicating the position of the lit LED, and the above response signal are input and these signals are displayed on the TV monitor 32. An image signal displaying information is formed and output to the video memory 110.

Timing control circuit 112 is clock oscillator 1
A suitable timing signal is formed from the clock signal output from GDC 108 and CPU 102.
and output to the video memory 110.

The P/S converter 116 performs parallel-to-serial conversion on the parallel digital signal from the video memory 110 to form a video signal, and outputs the video signal to the TV monitor 32.

Next, the operation of this embodiment will be explained with reference to the flowchart shown in FIG. First, the light pen 34 selects a visual field measurement program for visual field display, and then the visual field pattern according to the selected visual field measurement program is displayed as a bright spot visual target on a dark background.

Next, the optotype presentation conditions are read out from the presentation condition memory 104, and the LEDs are adjusted according to the readout optotype presentation conditions.
Matrix interface 102 is LED 29
The visual target is presented by lighting up sequentially. On the other hand, if the subject operates the recognition switch 16 and is able to recognize the optotype, he or she inputs an ON signal and stores this response in the response storage unit 106 according to the optotype presentation conditions at this time.
remembers.

Next, it is determined whether or not a signal for additional presentation of the optotype inputted by the light pen 34 has been input, and if the signal is not input, it is then determined whether or not the program has ended, If the visual field measurement program has not finished, the measurement routine advances through steps and the visual target is presented again, and if no signal for additional visual target presentation is input during the measurement, the visual field measurement program ends. Visual target presentation is performed until

If the signal for additional presentation of the optotype is not input when the optotype measurement program is finished, after the input of the output signal is detected, if the output signal is input, output formation will be performed, and the output will be formed. Otherwise, no output formation will occur. Next, it is determined whether or not the measurement is to be continued, and if it is to be continued, a measurement program is selected, and if it is not to be continued, the measurement is terminated.

When an input to additionally present an optotype is made using the light pen 34 during or after the visual field measurement program, the optotype pattern displayed as a bright spot optotype on the dark background is reversed, and the optotype pattern shown in FIG. 5A is reversed. As shown in Figure 3, the optotype pattern is changed to a scotoma optotype on a bright background. Subsequently, as shown in FIG. 5B, the additional presentation area input by the light pen 34 is detected and set as a dark area. Therefore, the additionally presented scotoma optotype is not visible on the TV monitor 32 here.

Subsequently, the optotypes included in the additional presentation area of the optotypes are extracted. Next, the input of the optotype presentation restart signal is determined, and when the input is determined, the process proceeds to the step of displaying the optotype pattern, and as shown in FIG. 5C, the additional presentation optotype pattern is darkened. Displayed as a bright spot target in the background.

If it is determined that the program has not ended, the measurement routine proceeds, and then the process proceeds to the optotype presentation condition reading step, where the optotype is presented using a new measurement routine.

In determining whether or not the output signal has been input, if it is determined that the input has been made, an output is formed and the process proceeds to the step of determining whether or not to continue the measurement.

If continuation is determined in the determination as to whether or not to continue the measurement, the process proceeds to a program selection step.

Furthermore, if it is determined in the determination of the input of the restart signal that the signal is not input, the process proceeds to step after detecting the target addition area and changing it to a dark area.

〔Effect of the invention〕

According to the present invention configured as described above, when a measurer inputs an area containing an additional visual target to be presented using a light pen, the input is immediately displayed on the TV monitor, and the measurer inputs an area containing an additional visual target to be presented. This has the effect of being able to know the visual target for additional presentation without starting the presentation, and is convenient for confirming input and correcting input. In addition, by visually confirming the trajectory of the light pen that inputs the visual target for additional presentation, and by erasing the visual target display within the trajectory, the visual target near the boundary of the additional presentation area can be displayed. , it is possible to easily know whether the visual target is not displayed, and the visual target can be presented accurately.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram of the present invention, FIG. 2 is a perspective view of an automatic visual field measuring device according to an embodiment of the present invention, and FIG.
The figure is a block diagram of the electrical system of the embodiment shown in Figure 2.
FIG. 4 is a flowchart showing the operation of the embodiment shown in FIG. 2, FIG. 5 shows the display on the TV monitor, FIG. 5A shows the display when the visual target additional presentation signal is input, and FIG. The input display of the target additional presentation area and FIG. 5C show the display of the additional presentation target. 1: Automatic visual field measuring device, 10: Housing, 1
6: Recognition switch, 26: Operation display device, 29:
LED, 30: Hemisphere dome, 32: TV monitor, 3
4: light pen, 100: I/O interface, 104: presentation condition storage section, 120: LED matrix interface.

Claims (1)

[Scope of Claims] 1. Presentation means for presenting an optotype for visual field measurement, presentation condition storage means for storing optotype presentation conditions, and optotype presentation conditions etc. read from the presentation condition storage means. a presentation control means for causing the optotype presentation means to present the optotype; a TV monitor for displaying the arrangement pattern of the optotype;
The placement pattern of optotypes is based on dark background and bright spot optotypes.
and a TV monitor control means for forming a signal constituted by bright-background optotypes and outputting it to the TV monitor; and an operation command means including a light pen and forming an optotype addition command signal and an optotype presentation restart command signal. and when an optotype addition command signal is issued from the operation command means, the TV monitor control means forms a signal for displaying the optotype pattern with a bright background and a dark spot optotype, and outputs it to the TV monitor; Subsequently, the scanning locus of the light pen on the TV monitor is controlled to be a dark area, and further, when the optotype presentation restart command signal is issued from the operation command means, the TV monitor control means displays the optotype pattern. A signal to be displayed using a dark background and a bright point optotype is formed and outputted to the TV monitor, while the presentation control means controls the optotype so as to present the optotype included in the dark area indicating the scanning locus of the light pen. An automatic perimetry device characterized by controlling presentation means.