E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
properly means withered-eyed. Persons are wall-eyed when the white is unusually large, and the sight defective; hence Shakespeare has wall-eyed wrath, wall-eyed slave, etc. When King John says, My rage was blind, he virtually says his wrath was wall-eyed. (Saxon, hwelan, to wither. The word is often written whall-eyed, or whallied, from the verb whally.)