Shakespeare, in using wall-eyed as a term of reproach (as wall-eyed rage, a wall-eyed wretch), alludes probably to the idea of unnatural or distorted vision. See the note under wall-eye. It is an eye which is utterly and incurably perverted, an eye that knows no pity.
Origin: Icel. Valdeygthr, or vagleygr; fr. Vagl a beam, a beam in the eye (akin to Sw. Vagel a roost, a perch, a sty in the eye) _ eygr having eyes (from auga eye). See Eye.