A visual acuity of 4.3 is equivalent to a visual acuity of 0.2 in the decimal visual acuity recording method. A visual acuity of 4.3 is the visual acuity recorded by the five-point visual acuity recording method, which is equivalent to a visual acuity of 0.2 in the fractional visual acuity recording method. The initial distance of the International Standard Vision Scale (ISVS) distance vision test is 5 meters, and the normal distance vision standard for adults is 1.0, which is equivalent to a visual acuity of 5.0 in the five-point visual acuity recording method. Therefore, 0.2 is a poor visual acuity and needs to be checked actively. First of all, the vision check should be done in both eyes, and the principle is to check the right eye first and then the left eye, using the palm of the hand or a small blackboard to cover one side of the eye, and do not press on the eyeball. Usually, our vision is mainly to reflect the visual function of the macula, the vision measured under normal conditions without glasses is called naked eye vision, and the vision measured after optometry and glasses is called corrected vision. It is recommended that patients with abnormal vision should consult a hospital in a timely manner to assess their condition and follow the doctor’s instructions for treatment.