Correct posture of the eye chart.

If you want to talk about how to test your eyesight, you have to mention the eye chart. We can simply and quickly understand the preliminary situation of visual function through the inspection of eye chart, but many people know nothing about its use. Actually, it's not difficult Now, we should try our best to cooperate with Mr. Jun to "catch up" the relevant knowledge of the eye chart for the students, study hard and take care of your eye health.

The eye chart can help you and your family find these eye problems early: pathological changes, myopia, hyperopia, astigmatism and amblyopia.

Decorating the lecture hall: how to use the eye chart

First, prepare a standard logarithmic visual acuity chart (see below for details) and stick it on the wall perpendicular to the ground.

? Stand 5 meters away from the eye chart and watch in parallel.

? Cover your left eye and identify the direction of the gap of "E" with your right eye until you can't see it clearly. The left eye recognition method is the same as above.

? Wear glasses to test your eyesight. The method is as above.

? Put it on record and the test will be over.

In order to make your test results more accurate, you need to pay attention to the following points:

1, when covering one eye, don't press the eyeball to avoid affecting the vision test;

2. In the environment with sufficient light and soft light, the inspection results will not be affected;

3, the body should be vertical, the eyes should be parallel to the line of the eye chart 1.0 or 5.0, and you can't look at it with your head tilted;

4. The sequence of detection is from top to bottom.

What do you think of visual effects? Cuhk optometry experts announce the answer

Vision examination helps to find out whether vision is lower than normal. Generally speaking, the vision standard of people over 6 and 7 years old should reach 1.0. If it is lower than 1.0, there may be ametropia. If it is serious, it cannot be ruled out that it is an eye disease. At this time, you should further investigate the problem, such as a comprehensive eye health examination.