Blinder
Part of speech: adjective
Definition: (of a person or animal) Unable to see, due to physiological or neurological factors.
Part of speech: noun
Definition: Something that blinds a bag or cloth put over the head of a difficult horse while it is being handled or mounted A screen attached to a horse's bridle preventing it from being able to see things to it's side. An exceptional performance
Winker
Part of speech: noun
Definition: A horse's blinder; a blinker.