blinder

(of a person or animal) Unable to see, due to physiological or neurological factors.

(of an eye) Unable to be used to see, due to physiological or neurological factors.

Failing to see, acknowledge, perceive.

“Authors are blind to their own defects.”

Of a place, having little or no visibility.

“a blind corner”

Closed at one end; having a dead end

“a blind gut”

Having no openings for light or passage.

“a blind alley”

(in certain phrases) Smallest or slightest.

“I shouted, but he didn't take a blind bit of notice.”

Without any prior knowledge.

“He took a blind guess at which fork in the road would take him to the airport.”

Unconditional; without regard to evidence, logic, reality, accidental mistakes, extenuating circumstances, etc.

“blind deference”

Unintelligible or illegible.

“a blind passage in a book; blind writing”

Abortive; failing to produce flowers or fruit.

“blind buds”

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 its side.

An exceptional performance.

“He played a blinder this afternoon on the cricket ground.”

A bout of heavy drinking, a bender.

To fit (a horse) with blinders.

(by extension) To obstruct the vision of.