What causes cataracts?

Cataract is a vision impairment disease caused by reduced transparency of the eye's lens. It is mainly caused by the following factors: 1. Aging: The most common cause is aging; as people grow older, the lens gradually hardens and becomes cloudy, which is part of the natural aging process. 2. Genetic factors: Some congenital cataracts may be related to heredity and can be present at birth or develop during early childhood. 3. Ultraviolet exposure: Prolonged exposure to ultraviolet light from sunlight, especially UV-B radiation, can accelerate lens degeneration. 4. Eye diseases: Ocular conditions such as diabetic retinopathy, glaucoma, and uveitis may also indirectly lead to cataracts. 5. Medications and toxins: Long-term use of certain medications, such as corticosteroids, or exposure to toxic substances, such as specific chemicals, may also be associated with the development of cataracts. 6. Lifestyle factors: Smoking, alcohol consumption, deficiency in nutrients such as vitamins C and E, and unhealthy lifestyle habits may increase the risk of developing cataracts. Note that when symptoms such as blurred vision, reduced color perception, and sensitivity to glare occur, prompt medical attention should be sought.