Ophthalmic examination device

Abstract

The invention relates to an ophthalmic examination device which comprises a device shell, a driving wheel and a reversing wheel are rotationally assembled in the device shell, the driving wheel is driven by a motor, a circulating belt is wound around the driving wheel and the reversing wheel, a testing visual chart and a demonstration visual chart are sequentially arranged on the circulating belt, the orientation of each letter on the demonstration visual chart is the same as or opposite to the orientation of the corresponding letter on the testing visual chart, the device shell is provided with a doctor observation port corresponding to the row of letters on the demonstration visual chart, the device shell is further internally provided with a test port corresponding to the row of letters on the testing visual chart, a row of letters, opposite to the test port, of the testing visual chart correspond to a row of letters, opposite to the doctor observation port, of the demonstration visual chart, a patient observation port is further formed in the device shell, a test channel with an optical structure is arranged between the patient observation port and the test port, and a light supplementing lamp is arranged in the test channel. The invention provides an ophthalmologic examination device capable of reducing the external environment for vision detection.

Description

technical field [0001] The invention relates to an ophthalmic examination device for vision detection. Background technique [0002] The eye chart is an important chart used to measure eyesight. The traditional eye chart is printed on paper, with 14 lines from top to bottom. The 14 lines are printed with "E" with different sizes and different opening directions. With the development of technology With the development, there are now electronic screen eye charts, which are not essentially different from paper eye charts. [0003] When performing a vision test on a patient, the patient needs to stand at a distance of 5 meters from the eye chart and observe the direction of the word E with one eye to judge the patient's vision. Obviously, the traditional vision testing has the following problems: First, it needs a testing space of 5 meters, which limits the indoor space. In terms of housing rental; in addition, since the vision test is carried out in a completely open space, t...

AI Technical Summary

Problems solved by technology

Obviously, the traditional vision testing has the following problems: First, it needs a testing space of 5 meters, which limits the indoor space. House rental; in addition, since the vision test is carried out in a completely open space, the unstable light outside will have a certain impact on the vision test

Images