Eyesight testing device and method

A vision test and eye chart technology, which is applied in the fields of eye test equipment, medical science, diagnosis, etc., can solve the problems of inaccurate test values, easy to forget reports, and inconvenient memory of test values, etc., to achieve the effect of ensuring accuracy

Active Publication Date: 2019-06-21
浙江国眼医疗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual test process, the testee blocked one eye with an eye-blocking key. When the tested eye could not see the visual mark clearly, the testee would habitually approach the eye chart, and then continue the test. The tester's eyes are less than 5 meters away from the eye chart horizontally, and the eye level is no longer at the same height as the line of sight at 1.0. At this time, the test value is inaccurate
Moreover, various actions of the testee during the test ...

Method used

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  • Eyesight testing device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Such as Figure 1-5 As shown, a kind of eyesight testing device comprises light box 1, mounting frame 2, test glasses 3 and indicating rod 4, and the front of light box 1 is provided with eye chart 5, and the back side of eye chart 5 is provided with a group of Hall sensor 6, and Hall The sensor 6 corresponds to the vision value on the vision chart 5 and each Hall sensor 6 is closely attached to the back of the vision value on the corresponding vision chart. Guide rails 7 and racks 8 are respectively fixed on the left and right sides of the back of the guide rail 7. Slidingly connected with a slider 9, the slider 9 is fixed on the back of the mounting frame 2, the inner rail groove of the guide rail 7 and the corresponding position of the slider 9 are T-shaped, so that the slider 9 is limited to slide in the guide rail 7, and the mounting frame The middle of 2 is provided with crosspiece 10, and controller 11 and stepper motor 12 are fixed on crosspiece 10, and the axle...

Embodiment 2

[0046] The present invention also provides a visual inspection method, comprising the following steps:

[0047] S1. Identify the electronic tag 20, enter the identity information, and store it in the storage 1102 of the controller 11 through Bluetooth transmission.

[0048] S2. The person to be tested first tests the right eye, uses a blocking piece to block the left eye socket of the test glasses 3, puts on the test glasses 3, and the ultrasonic transmitter 16 on the test glasses 3 transmits a signal, the first ultrasonic receiver 14, the second When the ultrasonic receiver 15 receives the signal, the second Bluetooth module 1602 records the transmission time and interacts with the first Bluetooth module 1104 , and sends the time information to the central processing unit 1103 .

[0049] S3. The central processing unit 1103 calculates the horizontal distance between the eyes of the testee and the visual acuity chart 5 according to the time difference between transmitting and ...

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Abstract

The invention provides an eyesight testing device and method and relates to the field of eyesight testing. The eyesight testing device and method has the advantages that the horizontal distance between a testee and a visual chart can be precisely calculated through an ultrasonic emission device, a first ultrasonic receiver, a second ultrasonic receiver and a central processing unit, and the testeecan be reminded to adjust the distance through the voice of a voice module until the distance meets the requirements of testing standards so as to guarantee the accuracy of the testing result; the height difference between a horizontal plane where the testee is located and the horizontal plane where the visual marks on the 1.0 row are located can be precisely calculated through the ultrasonic emission device, the first ultrasonic receiver, the second ultrasonic receiver and the central processing unit, a controller regulates a stepping motor to drive the visual chart to move upwards and downwards to guarantee the horizontal plane where the testee is located and the horizontal plane where the visual marks on the 1.0 row are located are on the same horizontal plane to meet the requirementsof the testing standards so as to guarantee the accuracy of the testing result; the testing result can be transmitted by the central processing unit to the mobile phone of the testee through Bluetooth, saved into a storage and compared with the subsequent testing results of the testee to judge whether the eyesight changes or not.

Description

technical field [0001] The invention relates to the field of vision testing, in particular to a vision testing device and method. Background technique [0002] With the development of science and technology, more and more multimedia devices are widely used by people, such as smart phones, computers, Internet TVs, etc. While these multimedia devices bring convenience and wonderful life to people, due to the increasing use time Long, its damage to people's eyes is getting bigger and bigger. In order to protect eyesight, people generally need to test the visual acuity value through an eye chart, detect changes in vision, and take protective measures in time. Visual acuity is generally divided into two categories: distance vision and near vision. The distance vision mostly adopts the international standard eye chart. This table is composed of 14 rows of "E" letters with different sizes and opening directions. The measurement ranges from 0.1 to 2.0 and is measured by The eye le...

Claims

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Application Information

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IPC IPC(8): A61B3/00A61B3/032
Inventor 梁恩惠余威明郑玲姚春艳孙守彬李春秀吴荒刘冬梅
Owner 浙江国眼医疗科技有限公司
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