Visual testing instrument and visual testing method

A vision inspection and vision technology, applied in the field of information inspection, can solve problems such as vision inspection manpower and environmental constraints, achieve real-time inspection of vision, solve the limitations of human and environmental conditions, and achieve the effect of thin thickness

Inactive Publication Date: 2015-06-03
BBK EDUCATIONAL ELECTRONICS CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention provides a kind of visual inspection instrument and visual inspection method, to solve the problem that visual inspection is restricted by manpower and environment, realize the real-time visual inspection of hand-held visual inspection instrument

Method used

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  • Visual testing instrument and visual testing method
  • Visual testing instrument and visual testing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] figure 1 The structure of the vision tester provided by the first embodiment of the present invention is shown.

[0024] by figure 1 It can be seen that the vision tester 1 includes a lens 11 having a function of extending the observation distance of the human eye, an eye chart display device 12, and a box 14 (preferably a rectangular parallelepiped box) with a certain shape.

[0025] The lens 11 with the function of extending the observation distance of the human eye and the eye chart display device 12 are installed in a box 14 having a certain shape.

[0026] The box 14 with a certain shape is provided with an observation hole 15 in front of the lens 11 with the function of extending the observation distance of the human eye.

[0027] The eye chart display device 12 is used to display the content of the eye chart.

[0028] Further, the installation distance between the eye chart display device and the lens with the function of extending the observation distance of the human eye...

Embodiment 2

[0033] image 3 The structure of the vision tester provided by the second embodiment of the present invention is shown.

[0034] by image 3 It can be seen that the vision tester 1 includes a lens 11 having a function of extending the observation distance of the human eye, an eye chart display device 12, and a box 14 (preferably a rectangular parallelepiped box) with a certain shape.

[0035] The lens 11 with the function of extending the observation distance of the human eye and the eye chart display device 12 are installed in a box 14 having a certain shape.

[0036] The box 14 with a certain shape is provided with an observation hole 15 in front of the lens 11 with the function of extending the observation distance of the human eye.

[0037] Further, the installation distance between the eye chart display device and the lens with the function of extending the observation distance of the human eye is smaller than the focal length of the lens.

[0038] The eye chart display device 12 i...

Embodiment 3

[0052] Figure 4 The flow of the vision inspection method provided in the third embodiment of the present invention is shown, and the details are as follows:

[0053] In step S401, the display randomly displays an optotype pattern with a vision level.

[0054] The display refers to an LCD liquid crystal display. Various levels of different optotype patterns are stored in the memory of the vision tester. When performing vision inspection, the processor controls different levels of different optotype patterns to be displayed on the monitor screen. The optotype patterns are displayed from the highest level according to the visual acuity level, and then switch to the next level.

[0055] The optotype pattern refers to a pattern used to test vision, such as the commonly used optotype letter E.

[0056] In step S402, the receiver receives vision check information sent by the user according to the optotype pattern.

[0057] The vision check information includes vision check voice informatio...

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Abstract

The invention belongs to the field of information check and provides a visual testing instrument and a visual testing method. The visual testing instrument comprises a visual chart display device, a lens with the function of extending the human eye observation distance and a box in a set shape, wherein the visual chart display device and the lens with the function of extending the human eye observation distance are mounted in the box body in the set shape; and an observation hole is formed, in front of the lens with the function of extending the human eye observation distance, in the box in the set shape. According to the visual testing instrument, the lens with the function of extending the human eye observation distance is utilized to extend the distance by which a human eye sees a visual chart to be the standard distance for visual test, so that the problem that visual test is restricted by both human and environmental conditions is solved and the visual testing instrument can be handheld for visual test in real time.

Description

Technical field [0001] The invention belongs to the field of information inspection, and particularly relates to a vision inspection instrument and a vision inspection method. Background technique [0002] The traditional vision check uses a vision check chart. The examiner indicates the letter E on the vision chart, and the examinee makes gestures according to the opening direction of the letter E seen. The examiner determines the vision of the examinee according to the opening direction of the letter E and the direction of the gestures. [0003] This method of operation is simple, but it is greatly restricted by the external environment. For example, the standard distance between the person and the eye chart must reach 5 meters, and there must be enough light intensity, not too bright or too dark; at the same time, the eye chart is marked The line of 1.0 should be the same height as the sight line of the examined eye, and the height should not be too different. Therefore, the po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/032
Inventor 邹文高王风秦伟郑战海
Owner BBK EDUCATIONAL ELECTRONICS CORP LTD
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