What is a Cataract

A cataract is a hardening or clouding of the eye's natural lens, which lies behind the iris . The lens focuses light onto the retina at the back of the eye and also adjusts the eye's focus, letting us see things clearly both up close and far away.

The lens is mostly made of water and protein. The protein is arranged in a precise way that keeps the lens clear and allows light to pass through it. But as we age, some of the protein can clump together and start to cloud a small area of the lens. This is a cataract , and over time, it may grow larger and cloud more of the lens, making it harder to see.  Ultimately, this clouding can result in blindness.