Cataract is a clouding of the lens in the eye, which turns from transparent to opaque and prevents light from entering the eye, thus affecting vision. The initial clouding has little effect on vision, but gradually worsens, significantly affecting vision and even blindness.
Worldwide, cataract is the primary cause of blindness. About 20 million people in the world are now blind due to cataract, and another 100 million cataract patients need surgery to restore their vision. According to the results of our survey, cataract is also the leading eye disease causing blindness in China.
Cataracts have many causes and most cases and patients are associated with old age. Certain diseases can also cause cataracts, such as diabetes and nephritis. Certain diseases can also lead to cataracts, such as diabetes and nephritis. There are also congenital cataracts, mostly seen in children. 60-70% of cataracts occur in the elderly aged 50-60, 80% in those aged 70 or older, and almost 100% of those aged 80 or older have cataracts, which will continue to increase as the world’s per capita life expectancy increases.