blind

Unable to see, or only partially able to see.

Failing to recognize, acknowledge or perceive.

Having little or no visibility.

Closed at one end; having a dead end; exitless.

Having no openings for light or passage; both dark and exitless.

Able to be fixed without access to one end.

Smallest or slightest.

Without any prior knowledge.

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

Using blinded study design, wherein information is purposely limited to prevent bias.