“ The word “wall eye” or “wall-eyed” is applied to a condition of the eye, particularly of a horse, in which there is a large amount of white showing or there is absence of colour in the iris, or there is leucoma of the cornea. It is also applied to the white staring eyes of certain fishes. The word has no connexion with “wall” as above, but is from the Icelandic vagleygr, vagl, a beam, sty in the eye, and eygr, eyed. ”