Flat eye

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Flat eyes , also called flat eyes , are eyes that consist of a number of flatly arranged light sensory cells , which are protected from the incidence of light on one side by pigment cells and are all excited together when incident light.

Flat eyes are known from jellyfish , starfish and some types of worms . Flat eyes only enable the distinction between "light" and "dark". By evaluating the information from several eyes, the organism can perceive the rough position of a light source or a shadow (e.g. a potential enemy). Since the light falls on flat eyes from all sides of the area not covered by the pigment cells, precise directional vision is not possible.

A further development is the pigment cup ocular (pigment cup eye or cup eye) - e.g. B. in lancet fish and vortex worms - is where the sensory cells are in a recess and therefore only respond to light from one direction.

literature

  • Eye . Lexicon of Neuroscience, www.spektrum.de, accessed on January 5, 2018

See also