SU1202545A1 - Apparatus for examining visual system - Google Patents

Description

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The invention relates to the class of ophthalmic devices and can be used to monitor the state of the human retina.

The aim of the invention is to reduce the study time by introducing an automatic search mode for localizing the 1st pathology zones.

The device provides two test modes. The first is for a given program when the patient’s response is normal. The second is the control mode, in which additional testing is performed; - the area of the retina with suspected pathology. After completion of the test test cycle, the mode of investigation according to a given program is established. A reduction in the patient's retinal examination time is provided by reducing the amount of software testing (first mode). As is well known, a certain amount of testing is required to ensure the required accuracy of the results of retinal studies. By introducing adaptive control testing of only suspicious retinal segments, the total amount of research can be reduced. At the same time, the high accuracy of the investigation of the visual fields of interest is ensured

on control tests. I

The drawing shows the scheme

devices.

The device contains a synchronous generator 1, the output of which is connected to the first inputs of the clock generator 2, character generator 3, block 4 specifying the size, display 5, block 6 specifying the direction of movement, generator 7 familiarity, block 8 coloring, switches 9 and 10, elements IDN 11 and 12, inverters 13 and 14, a plotter 15, a patient console 16, and a doctor’s console 17. The second input of the clock generator 2 is connected to the first input of the console 17 of the doctor, the first and; The second codes are connected to the first inputs of switches 9 and 10, respectively. The outputs of the inverters 13 and 14 are connected to the first inputs of the elements OR 11 and 12, the outputs of which are connected to the second inputs of the switches 9 and 10. The output of the switch 9 is connected to the first input of the familiarity generator 7, the second input of which

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connected to the first output of the block 6 specifying the direction of movement; the first output is connected to the second input of the character generator 3 and the first input

5, the plotter 15, the second output is connected to the first input of the 8 Coloring unit. The second input of the unit 4 of the task size is connected to the second output of the doctor’s house 17, the output is connected

 with the third input of the character generator 3., the output of which, in turn, 5 is connected to the second input of the coloring unit 8. The third input of the staining unit 8 is connected to the third output.

 5 of the doctor’s console 17, and the output is connected to the second input of the display 5, the first output of the patient’s console is connected to the second input of the plotter 15, the second output is connected to the input of the inverter 13 and the second input of the OR element 12. The input of the inverter 14 is connected to the second input of the OR element 11 and the second output of the block 6 specifying the direction of movement, the input of which is connected

 to switch 10 output.

The device works as follows.

The researcher from the doctor’s console 17 starts the clock generator 2 by pressing the corresponding key. At the same time, the resolving signal of the unit level from the first output of the doctor’s console 7 goes to the second input of generator 2. From the first output of the clock generator 2 through the switch 9 counting input of the generator 7 familiarity. These pulses form a code that characterizes the duration of the test and the threshold brightness level presented when testing an image according to a given (hard) program. When the patient clicks on the Test button - the object is not visible to F1outator 9 is closed.

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This is because the low level signal arrives at its second input from the output of the OR 11 element, and the switch 10 is opened when the second input of the given circuit of the logical unit from the output of the OR 12 element, impulses arriving at the input of the 6 eadan; moving from the second output of the clock generator 2 through the switch 10, determine the time of presentation of the control test objects during the adaptive testing. If the counter overflows in the familiarity generator

This is because the low level signal arrives at its second input from the output of the OR 11 element, and the switch 10 is opened when the second input of the given circuit of the logical unit from the output of the OR 12 element, impulses arriving at the input of the 6 eadan; moving from the second output of the clock generator 2 through the switch 10, determine the time of presentation of the control test objects during the adaptive testing. If the counter overflows in the familiarity generator

the high level signal from the second output of this circuit is fed to the input of the inverter 14 and the second input of the OR 11 element. G output of the inverter 14 of the logic level zero signal comes to the first input of the OR 12 element and then to the second input of the switch 10, locking it. From the output of the SHS 11 element, a high level signal is fed to the second input of the switch 9 and permits the passage of pulses from the first output of the clock generator 2 to the first input of the generator 7 familiarity. Thereby, patient testing is resumed according to a rigid program. At the output of the staining unit, a test image signal is generated, which is fed to the second input of the display 5. In the process of testing over a rigid program, the clock pulses from the output of the generator 2 through the switch 9 are fed to the generator 7 familiarity. At its output, upon receipt of the next clock pulse pr, they are shown with the coordinate codes X and Y, the test object

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In accordance with these codes, a signal of the test object is generated in the character generator 3, which is then painted using the coloring unit 8 and reproduced on the display 5. When the next test object is not perceived, the patient presses the Test button — the object is not visible, on the plotter 15 are fixed coordinates of the unrecognized stimulus and starts the cycle of adaptive control testing. The switch 9 is closed at the same time, and the switch 10 is closed. The clock pulses from the generator 2 begin to arrive at the size setting unit 4. At the outputs of block 4, the dX and LU codes are set, allowing the location of the test test to change relative to its initial position within the specified viewing angle. After completing the 4-step test control cycle, the patient is restarted with a rigid program.

Claims (1)

DEVICE FOR THE STUDY OF THE VISUAL SYSTEM, containing a clock, a clock, a character generator, a size setting unit, a display, a familiarity generator, a doctor’s desk, the output of a sync generator being connected to the first inputs of a clock generator, a character generator, a size setting unit, a display, and a first output of a familiarity generator connected to the second input of the character generator, the third input of which is connected to the output of the size setting unit, the second input of the clock generator is connected to the first output of the doctor’s console, that, in order to reduce the study time by introducing an automatic search mode for localized pathology zones, two switches, two inverters, two OR elements, a staining unit, a unit for setting the direction of movement, a graphical builder and a patient console are introduced into the device, the first output of the clock generator connected to the first input of the first switch, and the second output of the clock generator with the first input of the second switch, the inverter outputs are connected to the first inputs of the OR elements, the outputs of which are connected to the second the inputs of the switches, the output of the first switch is connected to the first input of the familiarity generator, the first output of which is connected to the first input of the plotter, the second input is the first output of the unit for setting the direction of movement, and the second output is connected to the first input of the coloring unit, the output of the character generator is connected to the second input of the coloring unit, the first input of the movement direction setting unit is connected to the output of the second switch, and the second output is connected to the second input of the first OR element and the input of the second inverter, the second and The third outputs of the doctor’s console are connected respectively to the second input of the size setting unit, and the third input of the staining unit, the output of which is connected to the second input of the display, the first output of the patient’s panel is connected to the second input of the plotter, and its second output is connected to the input of the first inverter and the second input of the second element OR.