Blindered Edit Meaning

1.

1-What they do to horses that pull carriages

2-One who is hardheaded and single minded, 3-People who are so simple they can't think past what they see right in front of them.

Why do they blinder horses, it seems so mean to only let them see in front of them.

When I told my friend the White Stripes need a bassist, he went on about how perfect they are without one. He's just so blindered.

I watched the matrix with my friend, but he's so blindered he said "I've seen way better action movies, why does everyone like this so much?"

See Kevin