Cataract surgery is currently the most important means of treating cataracts, and the indications are as follows: 1. Surgery can be considered when the visual acuity is reduced to about 0.3, but it is not an absolute indicator; 2. The disease needs to be treated by specialists and the corresponding index can be operated after reaching the standard. For example, surgery can be considered for diabetic patients with blood sugar control around 8mmol/L and for hypertensive patients with blood pressure control below 140/90mmHg.