Vision detection disc

Abstract

The invention provides a vision detection disc which comprises a round vision table disc, a frame body and a baffle dick, wherein the round vision table disc is equipped with multiple vision table groups in a radial pattern relative to the circuit center, each vision table group comprises multiple vision tables, and the areas of vision tables on each vision table group gradually increase from the circle center of the table disc to the outer edge, and areas of vision tables on the vision table group gradually increase; the round vision table disc is installed on the frame body in a rotatable manner; and the baffle disc is installed on the frame body, the baffle disk is disposed between the round vision table disc and a user, and an opening is formed in the baffle disc and used to display the vision table when the round vision table disc stops rotating. The round vision table disk can be rotated and drive the upper vision table to rotate at the same time. Stopping positions of rotation of the round vision table disc are random. Hence, when rotation is stopped, the displayed vision table is also random. In this way, a cheating phenomenon in the prior art that a user remembers the vision table disc during vision testing can be solved effectively.

Description

technical field [0001] The invention relates to the technical field of vision detection, in particular to a vision detection disc. Background technique [0002] The traditional visual acuity test form is to print visual acuity test symbols on paper or film according to test specifications, such as "C" or "E" font visual test symbols. In order to improve the lighting conditions of the vision test chart, the vision test chart can also be fixed on the surface of the light box. [0003] However, subject to the limitation of external conditions, testers often need to prepare multiple vision test tables to test the tester's vision. For example, in order to prevent the tester from cheating by memorizing the vision test symbols, it is necessary to temporarily modify the arrangement of the vision test symbols and replace the vision test chart. Or maybe due to space constraints, the size of the vision test symbol needs to be adjusted, and even due to the different purposes of the te...

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects that the visual acuity test table in the prior art is not rigorous enough to easily cause users to cheat.

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