Blinker

Webster's Dictionary of the English Language

·noun One who, or that which, blinks.

II. Blinker ·pl A kind of goggles, used to protect the eyes form glare, ·etc.

III. Blinker ·noun A blinder for horses; a flap of leather on a horse's bridle to prevent him from seeing objects as his side hence, whatever obstructs sight or discernment.