As the population ages, cataracts are becoming a growing health concern.
A cataract is a clouding of the eye lens to such an extent that it affects vision. The majority of cataracts develop due to the aging process, and by age 80, more than half of all Americans have them. However, there are also other type of cataracts: secondary cataracts, which form after surgery for other ophthalmic diseases such as glaucoma; traumatic cataracts, which can develop after an eye injury; congenital cataracts; and radiation-inducted cataracts. Cataracts can occur in just one eye, or bilaterally.
Age-related cataracts can develop in two ways. Protein clumping in the capsule of lens causes poor transmission of light, leading to blurred and cloudy vision. Also, the normally clear lens can develop a yellow or brown tint, making it difficult to differentiate between dark colors such as dark blue and black .
Risk factors for the development of cataracts include aging, certain diseases such as diabetes (which also causes diabetic retinopathy), personal behavior such as smoking and alcohol abuse, and environmental/professional factors such as exposure to radiation or sunlight....
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