The Compound Eyes of Fiddler Crabs: A Tutorial (page 6)

The Anatomy of the Compound Eye

The “pixels” of a compound eye are called ommatidia.

Each has a lens system that focusses light on a dense column of microvilli, called a rhabdom.

The microvilli contain photo-sensitive molecules.

Eight photoreceptors in each ommatidium contribute microvilli to the rhabdom.

They are surrounded by a pigment cell screen.

Updated:  21 November 2019/Responsible Officer:  Director RSB/Page Contact:  Webmaster RSB