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Compound eye of a house centipede Compound eye of a dragonfly. A compound eye is a visual organ found in arthropods such as insects and crustaceans.It may consist of thousands of ommatidia, [1] which are tiny independent photoreception units that consist of a cornea, lens, and photoreceptor cells which distinguish brightness and color.
In the fruit fly Drosophila melanogaster (the best-studied arthropod species with respect to developmental biology), among the most important genes for patterning the eyes of insects are the Pax6 homologs eyeless (ey) and twin of eyeless (toy). Together, these genes drive the proliferation of cells early in eye development.
An image of a house fly compound eye surface by using scanning electron microscope Anatomy of the compound eye of an insect Arthropods such as this blue bottle fly have compound eyes. A compound eye may consist of thousands of individual photoreceptor units or ommatidia (ommatidium, singular). The image perceived is a combination of inputs from ...
The butterfly compound eye consists of multiple ommatidia, each of which consist of nine photoreceptor cells (numbered from R1–R9), and primary and secondary pigment cells. [5] Nymphalid butterflies have the simplest eye ommatidium structure, consisting of eight photoreceptor cells (R1–R8) and a tiny R9 cell organized into a different tier.
More recently, in 1962 the biologist Vincent Dethier wrote To Know a Fly, introducing the general reader to the behaviour and physiology of the fly. [100] Musca depicta ("painted fly" in Latin) is a depiction of a fly as an inconspicuous element of various paintings. This feature was widespread in 15th and 16th centuries paintings and its ...
A simple eye or ocellus (sometimes called a pigment pit [1] [2]) is a form of eye or an optical arrangement which has a single lens without the sort of elaborate retina that occurs in most vertebrates. These eyes are called "simple" to distinguish them from "compound eyes", which have multiple lenses. They are not necessarily simple in the ...
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Each eye may have up to 17,000 individual light receptors , which in combination provide a broad mosaic view of the surrounding area. [6] One tropical Asian family, the Amphitheridae, has compound eyes divided into two distinct segments. [13] [20] The eyes are usually smooth but may be covered by minute hairs.