Visual acuity of 4.7 is equivalent to how many degrees of nearsightedness, which needs to be measured by an optometrist. Visual acuity of 4.7, in addition to being caused by nearsightedness, can also be caused by farsightedness or astigmatism, for example. Visual acuity is 4.7, also called visual acuity, usually said degree refers to the refraction. Clinically, there is no equivalence between refraction and visual acuity. Visual acuity of 4.7 can be caused by farsightedness, nearsightedness or astigmatism, and the exact degree can only be determined after a professional optometry examination, which is related to the individual’s different eye adjustment. Clinically, in order to make the refractive error measurement more accurate, often measured after dilating the pupils, after dilating the pupils, if the patient’s visual acuity returns to 5.0, it means that the patient has pseudomyopia, do not need to wear glasses, if after dilating the pupils, the visual acuity fails to return to normal, according to the actual refractive error to wear glasses. How many degrees, need to be evaluated by a professional ophthalmologist, follow the doctor’s instructions for correction.