Because of the differences in muscle tone and muscle tension in each individual, a visual acuity of 4.3 may correspond to 200° myopia, 300° myopia, or 400° myopia. The eye vision test 4.3 refers to visual acuity, which is obtained through the examination of a vision chart. Usually standing 5 meters away from the checklist, the left and right eyes are examined separately, from the top row gradually down the identification, when the identification of the difficulty of the upper row of the record for the visual acuity value, less than 5.0 for vision abnormalities, 4.3 visual acuity is less than 5.0, so there are problems with the eyesight. After the vision problem, how to determine whether it is nearsightedness, farsightedness or astigmatism, then need to carry out optometry examination.