Wall-eyed.

Farriery. Affected with moonblindness; moon-blind, moon-eyed. Obsolete.

Of a horse's eye: Affected with ‘walleye’.

Having one or both eyes of an excessively light colour, so that the iris is hardly distinguishable from… of horses. (See quot. 1831.)

Of a horse: affected with recurrent uveitis; moon-blind.

Of a horse: suffering from moon blindness (moon blindness, n. 1).