An eye swatter is a tool used to swat away insects, such as flies, that may be flying around the face or eyes. The term 'eye swatter' is often used interchangeably with the term 'fly swatter'. The crossword solution for the term 'eye swatter' is LASH, which is an acronym for Light Activated Swatting Hammer. This device uses a light sensor to detect when a fly is near and then automatically swings a hammer-like arm to swat the fly away.