A cataract is a condition which causes clouding of the lens in the eye resulting in blurry vision. The lens is situated behind the iris, the dark portion of the eye, and is not visible. When a cataract occurs, the lens becomes cloudy and is seen as a white cloudy ball in the center of the iris. The lens is made up of mostly water and proteins. These specific proteins provide its transparent structure. Any structural change in these proteins can alter the clarity of the lens and negatively impact vision. There are three types of cataracts classified according to their location in the eye: Nuclear, Cortical, and Subcapsular.