There is no optimal time for cataract patients to undergo surgery. It is more appropriate to perform surgery when vision loss affects work and study, and different patients have different needs for vision, so the optimal time for surgery is different for each person. Generally speaking, cataract surgery can be performed if the corrected visual acuity is less than 0.3 and there are no contraindications for surgery. Cataract patients can undergo surgery when their vision affects their normal life. However, patients with chronic systemic diseases or other eye diseases need to wait until their systemic condition improves and their diseases are effectively controlled before undergoing surgery. In the case of unexplained cataracts in adolescents with decreased vision in the affected eye, surgery is required immediately. Once a patient is determined to have cataracts, surgery is currently the main way to cure cataracts, and it is recommended to go to the hospital in time to avoid delays.