median eye

median eye
an organ on the top of the head of many reptiles; it plays an important role in the response to light.

Medical dictionary. 2011.

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  • median eye — See: nauplius eye [McLaughlin, 1980]. Sessile unpaired eye of nauplius larva which persists in some adults. (Syn. naupliar eye) [Moore and McCormick, 1969]. Term sometimes used to refer to a naupliar eye; see naupliar eye [Brusca and Brusca,… …   Crustacea glossary

  • median eye — see nauplius eye …   Dictionary of invertebrate zoology

  • Eye — The organ of sight. The word eye come from the Teutonic auge. The eye has a number of components. These include the cornea, iris, pupil, lens, retina, macula, optic nerve and vitreous. The cornea is the clear front window of the eye that… …   Medical dictionary

  • pineal eye — median, eye like structure on the top of the head in members of the Petromyzontidae, e.g., developing from the pineal organ …   Dictionary of ichthyology

  • naupliar eye — Relatively simple, median eye, typically consisting of 3 photoreceptor units (up to 7 in taxa where it persists in the adult) and first appearing in the nauplius larval stage. Thought to be a primitive (defining) feature of the Crustacea; it is… …   Crustacea glossary

  • nauplius eye — (Order Stomatopoda): Minute, unpaired light sensitive organ on ocular plate between eyestalks (ocular peduncles) [Stachowitsch, 1992]. (Subclass Branchiura): On dorsal midline of carapace, one to three simple photosensitive structures. (See also… …   Crustacea glossary

  • nauplius eye — (ARTHROPODA: Crustacea) In nauplii and many adults, an unpaired median eye consisting of 1 to few light sensitive cells; median eye; naupliar eye …   Dictionary of invertebrate zoology

  • 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

  • Simple eye in invertebrates — For eye like markings, see eyespot (mimicry). Ocellus redirects here. For the Celtic god, see Ocelus. Head of Polistes A simple eye (sometimes called a pigment pit[1] …   Wikipedia

  • Sleepy Eye, Minnesota — Sleepy Eye redirects here; for the Sisseton Sioux chief for whom this city is named, see Ishtakhaba. Infobox Settlement official name = Sleepy Eye, Minnesota settlement type = City nickname = The eye motto = imagesize = image caption = image… …   Wikipedia

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