You guys calling the original guy an idiot are all wrong. I'm a huge horse racing fan, and racehorses wear blinkers. A carriage-pulling horse, or a jumper, wears blinders, but the hoods that some racehorses wear are indeed blinkers, which is where the term comes from.
One of the most famous racehorses of all time, Secretariat, wore blinkers in all of his races.
Horses wear blinkers. It stops them getting startled by movement in the peripheral vision. So to be described as blinkered means you are not open to other ideas, Single minded. Blinkered!
People who worry about what horses wear instead of seeing that the real issue is IPod users are blinkered, because they believe there's nothing better.
Jose and Katie alwaysspeak before they think, they're such blinkered cocks, or should that be blindered?