an eye for an eye, a tooth for a tooth

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.

blink of an eye

A moment (a very short period of time).

camel through the eye of a needle

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

catch someone's eye

To capture someone's attention.

catch the eye

To attract the attention

clean as a hound's tooth

Very clean.

close one eye

to look the other way, to deliberately ignore or overlook (a mistake or transgression).

dry eye

An eye which is not crying, i.e. someone emotionally unmoved.