From The Collaborative International Dictionary of English v.0.48:
Blinker \Blink"er\, n.
1. One who, or that which, blinks.
[1913 Webster]
2. 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.
[1913 Webster]
Nor bigots who but one way see,
through blinkers of authority. --M. Green.
[1913 Webster]
3. pl. A kind of goggles, used to protect the eyes form
glare, etc.
[1913 Webster]