apposition eye
(ARTHROPODA)
The compound eye of diurnal insects and crustaceans in which the rhabdom reaches the crystalline cone, it absorbs oblique rays of light in the pigmented walls of the ommatidium and, produces a mosaic image; see superposition eye.

Online Dictionary of Invertebrate Zoology. . 2005.

Look at other dictionaries:

  • apposition eye — noun : a compound eye that is characteristic of diurnal insects and in which entering light reaches the retina of each ommatidium as a single spot and the image is a composite of all the spots compare superposition eye …   Useful english dictionary

  • Eye — For other uses, see Eye (disambiguation), Ocular (disambiguation), Ocular, and Oculus. For taxon specific articles, see human eye, simple eye in invertebrates, mollusc eye, and arthropod eye. Eye …   Wikipedia

  • eye, human — ▪ anatomy Introduction  specialized sense organ capable of receiving visual images, which are then carried to the brain. Anatomy of the visual apparatus Structures auxiliary to the eye The orbit       The eye is protected from mechanical injury… …   Universalium

  • superposition eye — (ARTHROPODA) In nocturnal or crepuscular arthropods, an eye that permits the passage of light through the non pigmented wall of one ommatidium to the iris of a neighboring one; an adaptation to protect sensitive photoreceptors from… …   Dictionary of invertebrate zoology

  • superposition eye — noun : an insect eye in which all light rays except those entering the central facet of a group of facets are intercepted compare apposition eye …   Useful english dictionary

  • Arthropod eye — Anatomy of the compound eye of an insect The arthropods ancestrally possessed compound eyes, but the type and origin of this eye varies between groups, and some taxa have secondarily developed simple eyes. The organ s development through the… …   Wikipedia

  • day-eye — (ARTHROPODA: Insecta) The apposition eyes adapted for use in daytime when light is abundant …   Dictionary of invertebrate zoology

  • photoreception — photoreceptive, adj. /foh toh ri sep sheuhn/, n. the physiological perception of light. [1905 10; PHOTO + RECEPTION] * * * Biological responses to stimulation by light, most often referring to the mechanism of vision. In one celled organisms such …   Universalium

  • insect — insectival /in sek tuy veuhl/, adj. /in sekt/, n. 1. any animal of the class Insecta, comprising small, air breathing arthropods having the body divided into three parts (head, thorax, and abdomen), and having three pairs of legs and usually two… …   Universalium

  • palisade — n. [L. palus, stake] (ARTHROPODA: Insecta) The clear region formed around the rhabdom in a light adapted eucone apposition eye when exposed to darkness …   Dictionary of invertebrate zoology

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