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.

Most arthropods have at least one of two types of eye: lateral compound eyes, and smaller median ocelli, which are simple eyes. [2] When both are present, the two eye types are used in concert because each has its own advantage. [3] Some insect larvae, e.g., caterpillars, have a different type of simple eye known as stemmata.

2011年12月11日 · In most insects there is one pair of large, prominent compound eyes composed of units called ommatidia (ommatidium, singular), of which there may be up to 30,000 ommatidia in a single compound eye. This type of eye gives less resolution than eyes found in vertebrates, but it gives acute perception of movement.

2024年11月20日 · Compound eyes are chief organs of vision in most insects and crustaceans, with two major forms: apposition compound eyes and apposition compound eyes. Most adult insects have a pair of compound eyes, one on either side of the head, which bulge out to a greater or lesser extent so that they give a wide field of vision in all.

2015年2月25日 · The compound eye is made up of many “ommatidia”, the basic units that the insect eye is comprised of. Each one is kind of like an eyeball in the fact that it has a lens which focuses light and has pigments (opsins) for detecting color.

Compound eyes are the primary visual receptors of adult insects and larval hemimetabola. They are paired structures located on either side of the head capsule, each consisting of multiple optical systems in contrast to the single optical systems of ocelli and stemmata.

2022年10月1日 · The insect compound eye is the most abundant eye architecture on earth. It comes in a wide variety of shapes and sizes, which are exquisitely adapted to specific ecosystems. Here, we explore the organisational principles and pathways, from molecular to tissular, that underpin the building of this organ and highlight why it is an excellent model ...

However, recent studies in Drosophila and other insects, including bees, beetles, and butterflies, have begun to address this gap by revealing the genetic and developmental bases of differences in eye morphology and key new aspects of compound eye structure and function.

Insects can have a number of eyes and moreover, eyes of different types; single eyes and compound ones. In contrast with our eyes, insect eyes are immovable and unable to focus. Insects are short sighted. Butterflies are probably the most far sighted, they can see perhaps a few meters, while bumblebees only have a range of a half meter.

* Most adult insects have a pair of compound eyes, one on either side of the head, which bulge out to a greater or lesser extent so that they give a wide field of vision in all directions. The compound eyes may, however, be reduced or even absent in some parasitic insects.