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  • Title: Light and dark adaptational changes in the accessory eye of the shrimp, Palaemonetes.
    Author: Itaya SK.
    Journal: Tissue Cell; 1976; 8(4):583-90. PubMed ID: 1020017.
    Abstract:
    The fine structure of the accessory eye of the shrimp, Palaemonetes, was studied after light and dark adaptation. Adjacent to the principal compound eye, the accessory eye is a small compound eye composed of about 20 ommatidia which are smaller in structure to the ommatidia of the principal compound eye. During dark adaptation, rhabdomal microvilli increase in length; however, little pigment migration occurs. The implications of these changes in relation to the function of the accessory eye are discussed.
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