walleye

Concise Oxford English Dictionary © 2008 Oxford University Press:
wall eye

▶noun

• 1 an eye squinting outwards.

• 2 an eye with a streaked or opaque white iris.

• 3 (walleye) a North American pikeperch with large, opaque silvery eyes. [Stizostedion vitreum.]

– derivatives
wall-eyed adjective.

– origin C16: back-form. from earlier wall-eyed, from ON vagleygr; rel. to Icelandic vagl ‘film over the eye’.