JPH0414571B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention automatically performs visual field presentation using a plurality of optotype presentation conditions, that is, visual field presentation conditions that differ in optotype position, brightness, presentation time, presentation interval, etc. The present invention relates to an automatic visual field measuring device that presents visual targets, and more particularly to an automatic visual field measuring device that has been improved in selecting a measurement program that is set at the beginning of measurement.

[Conventional technology]

Conventional automatic perimetry devices have a screening measurement program, a meridional measurement program that performs measurements in the radial direction, a glaucoma measurement program, etc., and optotypes are presented using these measurement programs. On the other hand, in order to facilitate the operator's operation procedure when turning on the power and starting measurements, an automatic perimetry device is used to automatically detect a visual field that is estimated to be frequently used and specified at the time of manufacture of the device. The system was configured to automatically read out the measurement program and prepare for visual target presentation.

[Problem that the invention seeks to solve]

In the conventional automatic perimetry apparatus described above, the measurement program read out at the beginning of measurement cannot be changed. On the other hand, the measurement programs that are frequently used at the beginning of measurement for each medical examination are different, and these measurement programs are, for example, a screening measurement program for mass examinations, a meridional measurement program for general ophthalmology examinations, and a meridional measurement program for adult disease examinations. This is a measurement program for glaucoma.

Therefore, depending on the type of medical examination, a predetermined measurement program is always read out at the beginning of measurement, for example, after the power is turned on, and preparations are made for visual target presentation, as in the past. The measurement program to be used for the second and subsequent visual field measurements on the same person is read out, rather than immediately after inputting the device, which has the problem of complicating the operator's operating procedure.

[Means to solve the problem]

The present invention has been made in view of the above-mentioned problems of the conventional automatic perimetry device, and is configured to read out the initial measurement program selected by the initial measurement program selection means at the beginning of the measurement and perform visual target presentation. .

That is, as shown in FIG. 1, the present invention includes an optotype presenting means 1 for presenting an optotype to a subject for visual field measurement, and a plurality of visual field measurement programs each having different optotype presentation conditions. an initial measurement program selection means 3 for selecting an initial measurement program to be set at the beginning of measurement; and an initial measurement program selection means 3 for reading and viewing the initial measurement program selected by the initial measurement program selection means 3 at the beginning of measurement. Visual target display control means 4 that performs target display control
configured to include.

〔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 operating display operation 26 mounted 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 eye fixation unit 22 to be measured vertically and horizontally. Inside the housing 10 is a hemispherical dome 30 with a large number of LEDs 29 arranged over the entire inner surface for presenting visual targets.

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 measured is the hemispherical dome 3.
This system monitors from the front whether or not the person is gazing at a fixation target (not shown) placed at the center of the spherical surface of 0, and the object being measured is monitored through an aperture located at substantially the same position as the fixation target. Monitor the anterior segment of the eye.

Next, the configuration of this embodiment will be explained based on FIG. 3. The I/O interface 100 includes a light pen 34 operated by the measurer, an output signal from a control switch 38, and a recognition switch 16 for inputting information as to whether or not the subject has recognized the visual target.
and an initial measurement program selection signal from the initial measurement program selection section 130, which converts the input signal into a signal suitable for processing by the internal device and is suitable for printing the measurement results on the printer 36. Convert to a signal. Although the explanation here assumes that the person to be measured operates the recognition switch 16 himself, the measurer may receive recognition from the person and input it using a light pen.

The CPU 102 performs the main control of this device, and in addition to the contents explained later in the flowchart,
Performs various timing controls.

The LED matrix interface 103 is
This is an interface for lighting the corresponding LED 29 under predetermined conditions in accordance with 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.
Combinations of optotype presentation conditions that determine how to light up the 29, i.e. lighting brightness (intensity), position, lighting time, etc., can be performed using multiple visual field measurement programs, such as screening measurement programs, meridional measurement programs, and glaucoma measurement programs. Measuring programs are stored in memory.

A GDC (graphics display controller) 110 receives an LED array signal, a selected measurement program signal, a signal indicating the position of the lit LED, and the above response signal, and displays these signals on the TV monitor 32. An image signal displaying information is formed and output to video memory 112.

Timing control circuit 114 is clock oscillator 1
A suitable timing signal is formed from the clock signal output from GDC 110 and CPU 102.
and output to the video memory 112.

The P/S converter 118 performs parallel-to-serial conversion on the parallel digital signal from the video memory 112 to form a video signal and outputs the video signal to the TV monitor 32.

Next, the operation of the CPU 102 will be explained based on the flowchart shown in FIG. When the power switch is turned on, the initial measurement program selection section 13
An output of 0 is detected, and then, based on this detection, the initial setting measurement program is read from the presentation condition storage section 104. Next, it is determined whether or not a measurement program selection signal has been input, and if not, it is determined whether a measurement start signal has been input. Then, when a measurement start signal is input, an optotype is presented according to the read measurement program.

On the other hand, the subject responds to the recognition of the presented optotype via the recognition switch 16.
The response output from 6 is stored. Subsequently, it is determined whether the measurement program has ended, and if it has ended, it is further determined whether a measurement program selection signal has been input. If the measurement program selection signal is not input, the input of the output signal is determined, and if the output signal is not input, the input of the measurement end signal is determined, and the measurement end signal is input. The measurement ends when the

Furthermore, when the input is determined in determining the input of the measurement program selection signal which is performed after reading the initial setting measurement program, the measurement program selected by the input is read out, and the measurement start signal is input. Proceed to the determination step.

Furthermore, if no input is determined in the determination of the input of the measurement start signal, the process proceeds to the step of determining the input of the measurement program selection signal, which is performed after reading the initial measurement program.

If it is not determined that the measurement program has ended, the measurement program advances one step and then proceeds to the optotype presentation step.

In the determination of the input of the output signal, when the input of the output signal is determined, an output such as a printout is formed, and then the process proceeds to the step of determining the input of the measurement end signal.

If the input of the measurement end signal is not determined in the determination of the input of the measurement end signal, the process proceeds to the step of determining the input of the measurement program selection signal.

〔Effect of the invention〕

As explained above, the present invention reads the initial measurement program selected by the initial measurement program selection means at the beginning of the measurement, and when the initial measurement program is not selected by the initial measurement program selection means, the initial measurement program is predefined. The measurement program is configured to read out a measurement program and perform visual target presentation, and at the beginning of measurement, a predetermined measurement program is automatically read out, and the measurer can also read out any other measurement program as desired. have an effect.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the configuration 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, FIG. 3 is a block diagram of the electrical system of the embodiment shown in FIG. 2, and FIG.
The figure is a flowchart showing the operation of the electrical system CPU. 10...Housing, 16...Cognition switch,
26...Operation display switch, 29...LED, 3
0... Hemisphere dome, 32... TV monitor, 36...
...Printer, 38...Control switch, 1
00...I/O interface, 102...
CPU, 103...LED matrix, 104...
...Presentation condition storage unit, 108...GDC.

Claims (1)

[Scope of Claims] 1. An index presenting means for presenting an optotype to a subject for visual field measurement, a measurement program storage means for storing a plurality of visual field measurement programs each having different optotype presentation conditions, and an initial measurement program. an initial measurement program selection means for selecting an initial measurement program set in the initial measurement program; and an optotype presentation control means for reading out the initial measurement program selected by the initial measurement program selection means and controlling the optotype presentation at the beginning of measurement. An automatic visual field measuring device characterized by: 2. When the optotype presentation control means receives a measurement start signal from the measurer at the beginning of the measurement, the optotype presentation control means calls the initial measurement program and controls the optotype presentation according to the initial measurement program; When a selection signal for selecting another measurement program is received from the measurer, the other measurement program is called and visual target presentation control is performed in accordance with the other measurement program. An automatic perimetry device according to claim 1.