JPS60241420A - Automatic visual field measuring apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic eye field measurement device that presents an optotype according to a predetermined program, and more specifically, to an automatic eye field measuring device that presents an optotype according to a predetermined program, and more specifically, an automatic eye field measuring device that presents an optotype according to a predetermined program. The present invention relates to an automatic perimetry device that can additionally display any parent or mark 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 include optotypes that are the optotype arrangement pattern displayed on the TV monitor, that is, the optotypes that are additionally presented. The area was specified and inputted by surrounding it with light veins.

[Problem that the invention seeks to solve]

The specification of the optotype for additional presentation of the conventional automatic perimetry device described above is not displayed immediately after being input by the light ben on the TV monitor, but is displayed on the TV monitor only after the specified optotype is presented. There was a problem in that the measurer could not know whether the input by the light ben was desired before presenting the optotype, and could not correct the input if necessary.

The present invention solves the above problem, and when the measurer inputs an optotype to be additionally presented or an area including the optotype using a light, the input is immediately displayed on the TV.
The purpose of the present invention is to provide an automatic perimetry device that is displayed on a monitor.

The present invention also provides a method for clearly indicating the trajectory of the light (i.e., the scanning area) from the non-scanning area by using a display different from the non-scanning area, such as a different color display or black and white inverted display, and furthermore, erasing the optotype display within the scanning area. An object of the present invention is to provide an automatic perimetry device that can clearly display whether or not visual targets near the boundary of the non-scanning area will be 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 read out from the presentation condition storage means 2. A presentation control means 3 that causes the optotype presentation means 2 to present the NeM mark according to conditions, a TV monitor 4 that displays the arrangement pattern of the optotypes, and a TV monitor 4 that displays the arrangement pattern of the optotypes based on the dark background and bright spot viewing #. , a TV monitor control means 5 for forming a signal constituted by a bright background and a scotoma visual target, and outputting the signal to the upper FTV monitor, and a TV monitor control means 6 for displaying a target addition command signal and a visual target. and an operation command means 7 for forming a restart command signal, and when the m% addition command signal is issued from the operation command means 7, the TV monitor control means 5 changes the optotype pattern between the bright background and the scotoma target. A signal to be displayed is formed and outputted to the TV monitor 4, and then the scanning trajectory on the TV monitor 4 of the lie F < 76 is controlled so as to be a dark area, and furthermore, a visual target is sent from the operation command means 7. When the presentation restart command signal is issued, the TV monitor control means 5 forms a signal for displaying the optotype with a dark background and a bright spot and outputs it to the TV monitor 4, while the presentation control means 2
is an automatic perimetry device #f# for controlling the above-mentioned Yanagi presentation means 1 so as to present the image included in the dark area showing the scanning locus of the Light Ben 6.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in FIG. 2, the automatic visual field measuring device is equipped with a housing 10, which has a circular hole 12 for inserting the subject's face, and is attached to the front side of the housing 10. eyelid 14, a V-sensing switch 16, a forehead rest 18 and a chin rest 20 attached to the housing 10 for fixing the eye to be examined in a predetermined position.
It has an operation display device 26 attached to.・(Nel 1
A handle 28 is provided on the lower part of the wall near the front of the 4 for moving the measurement limit fixing part 22 vertically and horizontally. Inside the housing 10, a hemispherical dome 30 is built in which a large number of LEDs 29 are arranged as visual targets over the entire inner surface for presenting visual targets.

The operation display device 26 includes a TV monitor 32 and a light monitor 3.
4. Printer 36 placed below the TV monitor 320;
Control switch 3 located above the TV monitor
8 and a fixation monitoring telescope 40. TV monitor 32
The type of visual inspection and target distribution presented on the inner surface of the hemispherical dome 30, as well as a plurality of sweeping commands to be described later, are displayed, and the operator selects an operation command using the Light Ben 342HF control switch 38 to operate the device.

Printer 36 prints the measurement results. The fixation monitoring telephoto-40 monitors from the front whether or not the subject's eye is gazing at a fixation target (not shown) placed at the center of the spherical surface of the hemispherical dome 30. The anterior segment of the subject's eye during measurement is monitored through an aperture located at substantially the same position as the eye.

Next, the configuration of this embodiment will be explained based on FIG. 3.

The I10 interface 100 includes a light pen 34 and a switch 3 operated by the measuring person.
8 and a recognition signal from a recognition switch 16 which inputs whether or not the person to be measured has recognized the visual target or the number of visual targets recognized by the number of operations, and the input signals are processed by the internal device. A suitable signal button is converted and the measurement result is converted into a signal suitable for printing on the printer 36. Here, it is explained that the person to be measured operates the recognition switch 16 himself/herself, but the person taking the test may receive the recognition from the person and input it using the light ben. In addition to what will be explained later in the flowchart, various types of timing control are also performed.

The LED matrix ink face 120 is CPL1
LED 2 according to the optotype presentation conditions read out by 102.
9 is an ink face for lighting up under predetermined conditions.
A matrix is formed by at least two transistor arrays.

The presentation condition storage unit 104 stores the a-building presentation conditions that determine how the LED 29 of the dome 30 is lit, that is, the combination of lighting brightness and intensity), position, lighting time, etc., as a visual field measurement zologram. There is. The types of perimetry programs stored here include perimetry programs for measurement purposes, such as perimetry programs for ophthalmoscopy and glaucoma testing, but as will be described later, there are perimetry programs for the right eye and left eye, respectively. There are not j types of things, but only one type of each type.

The presentation condition storage unit 104 assumes matrices for each of the two left and right divided visual fields of the ear side and the true side, and stores the position data of the optotypes among the optotype presentation conditions as row and column numbers of the respective matrices.

The response storage unit 106 stores the recognition signal from the recognition switch 16, which inputs whether the subject recognized the index or the number of visual targets recognized as the number of operations, as the subject's response to display the visual target at that time. Store in relation to conditions. This is a trap,
Obtain data regarding the subject's visibility.

C0C (graphic display controller) 10
8 is commercially available under the name of NEC (registered trademark) μPD7220, and includes an LED array signal, a selected measurement program signal, and the position fl of the lit LED.
The timing control circuit 112 receives the signal indicating the 0 and the above response signal, forms an image signal for displaying the information of these signals on the TV monitor 32, and outputs it to the video memory 11 (RC). A suitable timing signal is formed from the clock signal generated by
It outputs to DCloB, CPU 102 and video memory 110.

The P/S converter 116 converts the parallel digital signal from the video memory 110 into a parallel to serial signal to form a video signal and output it to the TV monitor 32VC. Refer to and explain. First, a visual field measurement program for presenting an optotype is selected using the light pen 34, and then a visual pattern according to the selected visual field measurement program is displayed as a bright spot on a dark background.

Next, the optotype presentation conditions are read out from the presentation condition storage 104, and the LED matrix interface 102 sequentially turns on the LEDs 29 according to the read out optotype presentation conditions to perform optotype presentation. On the other hand, if the subject operates the recognition switch 16 and is able to recognize the rabbit or naka, he or she inputs an ON signal, and the response storage unit 106 stores this response in accordance with the optotype presentation conditions at this time.

Subsequently, the light ben 34 determines whether or not a signal is input for additional presentation of the visual target, and if the # signal is not input, it is determined whether or not the next 1/Cf program is finished. If the measurement program has not been completed, the measurement routine will advance/step and the display will be performed again.During the measurement, a signal for additional display of one willow must be input. Visual inspection presentations are performed until the perimetry program is completed.

If the signal for additional presentation of the optotype is not input when the visual field measurement program is finished, after the input of the output signal is detected, the output signal is input (・re&f output formation is performed, and the input If not, output formation is not performed.Next, it is determined whether or not the measurement is to be continued.If the measurement is to be continued, a measurement grogram is selected, and if not, the measurement is terminated.

When the light ben 34 inputs an input force for additional presentation of the optotype during or after the visual field measurement program, the optotype (which was not displayed as a bright spot on the dark background) or the turn is reversed and As shown in Figure S AIC 5, the display changes to a bright background with a bright background. Next, Part S
As shown in FIG. EIK, the additional presentation area inputted by the write 734 is detected and made into a dark area. Therefore, here, on the TV monitor 32, the additional presentation of the visual point is 1iE.

Next, the cultivated species included in the additional presentation area of the god and camphor are extracted. Next, the input of the restart signal for tXS presentation is determined, and when the input is determined, the process proceeds to the step of displaying the prayer barrel and turn, and as shown in FIG. Display turns as bright dots on a dark background.

If it is determined that the grogram has not ended, the measurement routine proceeds, and then the process proceeds to the step of reading the optotype presentation conditions, and the optotype is presented according to a new measurement routine.0 The above output In determining whether or not a 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 program selection step fK advances.

Further, if it is determined that the signal is not input in step 1 of determining whether the restart signal is input, the process proceeds to the step of detecting the benediction addition area and changing the stiffness to a dark area.

〔Effect of the invention〕

According to the present invention configured as described above, when a measurer inputs an area including a visual target to be additionally presented by a light ben, the input is immediately displayed on a TV monitor, and the measurer inputs an area including an additional visual target to be presented. This has the effect of making it possible to know the visual target to be additionally presented without starting the process, and is convenient for confirming input or correcting input. In addition, by visually confirming the trace of the light ben 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 the drawing]

Fig. 1 is a block diagram of the mechanical part of the present invention, Fig. 2 is a perspective view of an automatic visual field measurement 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. 7 The figure is a flowchart showing the operation of the embodiment shown in Figure 1, Figure S shows the display on the TV monitor, Figure 5A is the display when the visual target additional presentation signal is input, and Figure 5B is the visual target additional presentation. The input display of the region and the display of the additionally presented optotype are shown in FIG. l: Automatic visual field measurement device 10: Housing 16 2g knowledge switch 26: Operation display device 29: LED 30: Hemisphere dome 32: TV monitor 34: Light-in

Claims (1)

[Scope of Claims] Means for presenting an optotype for visual field measurement; presentation condition storage means for storing optotype presentation conditions; Presentation control means for displaying optotypes, a TV monitor for displaying an optotype arrangement pattern, and a signal forming means for forming an optotype arrangement pattern of a dark background, a bright spot optotype, and a bright background optotype. a TV monitor control means for outputting a visual target addition command signal to the TV monitor; and an operation command means for forming a light pen, a visual target addition command signal, and a visual target presentation restart command signal; When the signal is emitted, the TV monitor control means forms a signal for displaying the optotype pattern with bright background and scotoma and outputs it to the TV monitor, and then scans the light pen on the TV monitor. The trajectory is controlled to be a dark part, and further, when the operation command means issues a command signal for restarting the display of the cat target, the TV monitor control means generates a signal for displaying the target pattern with a dark background and a bright spot target. to form the above T
An automatic visual field measuring device, wherein the display control means controls the optotype presentation means to display an optotype included in a dark area indicating the light-in scanning locus.