Movable eye chart for ophthalmology

Abstract

The invention relates to a visual chart, in particular to a movable type visual chart for the ophthalmology department. The technical purpose is to provide a movable type visual chart for the ophthalmology department capable of reducing the accumulated dust on the surface of the visual chart and improving the testing accuracy. The movable type visual chart for the ophthalmology department comprises a first electric reel, a first pulling rope, an installing plate, sliding rails, first sliding blocks, a fixed block, a shears-fork type lifting frame and the like; the first electric reel is installed on a ceiling and is wound with the first pulling rope, the tail end of the first pulling rope is connected with the installing plate, the sliding rails are both connected to the left and right sides of the top of the installing plate, and the first sliding blocks are arranged on the sliding rails. The installing plate can make the visual chart be in a horizontal state to avoid that a large amount of dust falls on the visual chart, the accumulated dust on the surface of the visual chart can be preliminarily reduced through a frame body, air is pushed into the frame body through an air outlet pipe and sprayed on the visual chart to blow the dust out of the visual chart, and therefore the vision can be conveniently tested.

Description

technical field [0001] The invention relates to an eye chart, in particular to a movable eye chart for ophthalmology. Background technique [0002] The full name of ophthalmology is "eye disease specialist", which is a discipline that studies diseases that occur in the visual system, including the eyeball and its associated tissues. Ophthalmology generally studies vitreous, retinal diseases, optometry, glaucoma, optic neuropathy, cataract, etc. eye disease. [0003] An eye chart is a chart used to measure vision. The eye charts used in China include: international standard eye chart, logarithmic eye chart, and Langer's ring eye chart. Functionally, there are near vision chart and distance vision chart. The eye chart is formulated based on the principle of visual angle. Visual acuity is generally divided into two categories: distance vision and near vision. International standard vision chart is used for distance vision. This chart is composed of 14 rows of "E" characters...

AI Technical Summary

Problems solved by technology

[0004] The eye chart is a commonly used visual acuity measurement tool in ophthalmology. It is usually fixed on the wall. After a long time, the surface of the eye chart will be stained with dust or foreign matter, which will cause the words on the eye chart to be unclear, which will affect the accuracy of the measurer's vision measurement. In this way, medical staff will often wipe the vision chart, but frequent wiping of the vision chart will erase the words on the vision chart, which will make the writing on the vision chart unclear, which will still reduce the accuracy of vision measurement

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