Cataracts are a major eye disease that causes blindness, often occurring in people over the age of 50. There is no way to prevent it, and surgery is the effective and only way to treat cataracts. During the development of cataracts, if left untreated, many serious complications can arise, such as glaucoma and uveitis. These eye diseases mostly occur in the middle and late stages of cataract, which will not only cause blindness, but also eye pain, eye swelling, and repeated inflammation that are unbearable and eventually lead to eye atrophy. Therefore, cataracts must be treated surgically when they reach a certain level.