A cataract is a clouding of the normally clear lens of the eye. It can be compared to a window that is frosted or yellowed, or looking through a foggy or dusty car windshield. Things look blurry, hazy or less colorful with a cataract.
The lens inside your eye is subject to the effects of age just like any other body part – with time, it just doesn’t function like it used to. When we are younger, the human lens is clear and flexible so objects at a variety of distances are easily focused. As time goes by the clear lens gradually, and sometimes rapidly, becomes cloudy, forms a cataract, and focus starts to fail.
The most common type of cataract is related to the normal aging process of the eye. Other causes of cataracts include family history, medical conditions like diabetes, traumatic or surgical eye injury, medications, long-term unprotected exposure to sunlight, or occupational exposure.