Ocelli

ocelli A type of eye found in threes in insects that detects light and dark, used primarily in flight. Covered in Lab 12 Animal Diversity II ocular the eye-piece of a microscope which serves to magnify the object. Full article ...

Ocelli: Simple eyes on some adult and larval insects. Typically there are three, which form an inverted triangle dorsally, the function of which is obscure.

Some of the simplest eyes, called ocelli, can be found in animals like snails, who cannot actually "see" in the normal sense. They do have photosensitive cells, but no lens and no other means of projecting an image onto these cells.

In most invertebrates the years are immovable ocelli, or compound eyes made up of numerous ocelli. See ocellus.

usually three ocelli located on the head one pair of antennae on the head mouthparts consisting of a labrum, a pair of mandibles, a pair of maxillae, a labium, and a tonguelike hypopharynx ...

simple eye; contrast to compound eye (plural, ocelli) Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...

See also: Larva, Animals, Organ, Protein, Tissue