turn a blind eye

an eye for an eye, a tooth for a tooth

compensation for injury caused by a person, in the form of inflicting of an identical injury on that person.

apple of someone's eye

The object of somebody's affections; a person (or sometimes a thing) that someone strongly prefers; a favorite, a loved one.

blind date

A date (romantic meeting) between two people who have never met before.

blind leading the blind

A situation in which an unqualified person is attempting to guide, advise, or train others.

blind with science

To overwhelm someone with details in order to influence or mislead them.

blink of an eye

A moment (a very short period of time).

Buggins's turn

A humorous, disparaging term for the appointment of a person by rotation or promotion, on the basis of length of service (it being that person's "turn") rather than merit or level of qualification.

camel through the eye of a needle

Hyperbole to illustrate something that is impossible to do or to make happen.