The term CATARACT SITE can be broken down into four crossword solutions: NILE (4 letters), LENS (4 letters), EYE (3 letters), and ASWAN (5 letters). The Nile is a major river in Africa, and ASWAN is a city located in the south of Egypt on the east bank of the Nile. The LENS is a transparent structure in the EYE that helps to focus light onto the retina. Cataracts are a clouding of the LENS that can cause vision loss, and ASWAN is the site of one of the world's most famous cataract sites.