Definition of simple eye in English:

simple eye


  • A small eye of an insect or other arthropod which has only one lens, typically present in one or more pairs.

    Also called ocellus
    Contrasted with compound eye

    ‘Complementing the large compound eyes, locusts have three much smaller simple eyes or ocelli characterized by rapid signal transmission and high photic sensitivity but very poor spatial resolution.’
    • ‘Between the compound eyes are usually three simple eye, or ocelli.’
    • ‘Humans, indeed all seeing vertebrates, have so-called simple eyes: they have a single lens system, focusing light to form one, continuous image of the outside world.’
    • ‘This schizochroal optical system, acting as an aggregate of simple eyes, may have provided a kind of stereoscopic vision because of the geometrical arrangement of lenses on the visual surface.’
    • ‘They consist of a pair of compound eyes made up of numerous six-sided facets (28,000 in some dragonflies, 4,000 in house flies) plus three simple eyes.’


simple eye

/ˈsimpəl ī/ /ˈsɪmpəl aɪ/