The naked eye vision of a patient with 500 diopters of myopia is not clear and a visual acuity examination is required to determine this. Because each person’s ciliary muscle regulation is different, resulting in each person’s refractive adjustment ability is not the same, may be the same degree of myopia, naked eye visual acuity is also different, especially in children, the local regulation is relatively strong, the visual acuity of the difference between the greater. Therefore, it is not possible to estimate the naked eye visual acuity of a patient based on the degree of myopia, and there is no one-to-one quantitative relationship between the two. There is no quantitative relationship between the two. Accurate visual acuity can only be determined by a vision examination in the hospital, and cannot be assessed by the number of myopia degrees. If the patient feels that his/her vision has decreased, he/she can visit the hospital for a visual acuity examination to assess the level of visual acuity. It is recommended that patients with vision loss seek medical attention to assess their condition and follow the doctor’s instructions for treatment.