Definitions

Cavity in carapace containing eye. [Williams, 1984]
Circular opening in front part of some decapod carapaces enclosing eyestalk. [Moore and McCormick, 1969]
Circular to rectangular opening in anterior face of carapace supporting ocular peduncle in some decapods. [McLaughlin, 1980]
One of a pair of excavations on the anterior margin of the carapace in which the eye is situated. [Hobbs, Hobbs, and Daniel 1977]
One pair of excavations on anterior margin of carapace bodering eye (or remnant). [Hobbs and Jass, 1988]
The eye socket or excavation in the anterior margin of the carapace in which the eye is lodged. [Chace and Hobbs, 1969]
The eye socket. [Butler, T. H.]
The region of the carapace nearest to the eyes. [Ingle, 1983]
The socket at the front of the carapace in which the eye is situated and into which it can be folded. [Warner, 1977]
(Taxon-specific: Order Decapoda) On anterior margin of carapace, one of two openings enclosing eyestalks (ocular peduncles). (circular, tubular). [Stachowitsch, 1992]