Ocellus is a term used to describe a simple EYE found in some animals. It is composed of a light-sensitive pigment and a nerve ending, and is usually found in invertebrates such as insects and crustaceans. The crossword solutions for the term Ocellus are EYELET (6 letters), Eyespot (7 letters), and EYE (3 letters). EYELET is a small hole or perforation in a fabric, while an Eyespot is a pigment spot on the body of an animal that functions as an EYE. Finally, EYE is a simple organ of sight.