Methods of measuring eye vision

1. Optometry

is a commonly used test item

for screening vision

. It usually needs to be checked with the aid of a letter chart. The examinee needs to be checked at a distance of 5 meters from the vision chart and keep natural light. The left and right eyes need to be tested separately.

2. Optometry

If the results of the eye chart are obviously abnormal, further optometry can be performed. The minors need to first dilate their pupils before the examination, and then optometry. The results are relatively accurate. Optometry requires a doctor to test them through professional instruments, which can detect the specific type and degree of refractive error.