A visual acuity of 4.3 does not accurately determine the degree of myopia. Visual acuity can be measured by an optometer, and the degree of myopia is usually determined by an optometric examination. There is no direct relationship between visual acuity and myopia. Once the visual acuity is known, the refractive status and the degree of myopia can only be clarified after a complete optometry examination. Visual acuity of 4.3 is lower than normal, which may be caused by refractive errors such as myopia, or by other reasons such as fundus lesions. Once you find 4.3 visual acuity in the vision examination, you should go to the regular hospital and cooperate with the professional ophthalmologist to complete the examination with dilated pupil and optometry. If it is caused by myopia or astigmatism, it should be corrected in time. When vision loss occurs, you should consult a doctor as soon as possible to improve the examination, clarify the cause, and then intervene according to the doctor’s instructions to avoid delaying the condition.