A cataract is a medical condition in which the LENS of the EYE becomes cloudy, resulting in vision loss. It is caused by the buildup of proteins in the LENS, which can be caused by aging, injury, or other medical conditions. TORRENT (7 letters) is a strong and fast-moving stream of water, often associated with heavy rain. FALL (4 letters) is the act of moving from a higher to a lower position. FLOW (4 letters) is the continuous movement of a liquid or gas. DELUGE (6 letters) is an overwhelming amount of water, usually associated with flooding. FLOOD (5 letters) is an overflow of water that submerges land. CATACLYSM (9 letters) is a violent and sudden natural disaster. CASCADE (7 letters) is a series of waterfalls. Falls (5 letters) is another word for WATERFALL. WATERFALL (9 letters) is a steep descent of water over a cliff or ledge. ASWAN (5 letters) is a city in Egypt located on the banks of the Nile River. EYE (3 letters) is the organ of sight. LENS (4 letters) is a curved piece of glass or plastic used to focus light. Nile (4 letters) is a major river in Africa, running through Egypt.