The term “400 diopters” refers to the refractive error of myopia, and “zero percent” is the visual acuity value, there is no conversion between the two, if the patient needs to determine the visual acuity, it is recommended to go to a professional organization for visual acuity examination.
Usually, the degree of myopia is aggravated with the increase of the absolute value of refractive error, the refractive error is denoted by D. 400 degrees means that the patient’s myopia is 400 degrees, which belongs to the category of moderate myopia, and it can lead to the patient’s visual acuity loss. In general, the higher the myopia, the more obvious the vision loss, but there is no one-to-one quantitative relationship between the two.
Visual acuity is the ability of a person to see clearly, “zero point several” is the result of visual acuity with decimal recording method. In the decimal recording method, the normal visual acuity should be 1.0 and above, if the patient needs to determine the visual acuity, need to carry out visual acuity testing, refraction and visual acuity between the fixed conversion relationship, can not be converted.
It is recommended that myopic patients seek prompt medical attention to evaluate their condition and follow the doctor’s instructions for treatment.