Age-related cataract is the most common type of eye disease in elderly patients, mostly occurring in people over 50 years old. The progressive clouding of the lens causes discomfort such as blurred vision, double vision, poor vision in dark environments, and inconvenience and danger in life because of the inability to judge height and distance. Most patients complain of a foggy feeling in front of their eyes, as if there is always eye fog in their eyes, but there is actually none. Some patients suddenly find that they don’t need to wear presbyopic glasses to see up close and think that their eyes are getting better, but in fact, cataracts may cause a change in refractive status. The onset of cataracts is often bilateral, and can occur sequentially or simultaneously, and can take months to years from onset to maturity. The fundamental treatment: surgery. There is no evidence that medications for cataracts are effective in inhibiting the progression of cataracts.