sight

The ability to see; the visual faculty.

The act of looking or seeing or observing.

The range of vision.

“out of sight of land”

(often followed by `of') a large number or amount or extent.

An instance of visual perception.

“the sight of his wife brought him back to reality”

“the train was an unexpected sight”

Anything that is seen.

“he was a familiar sight on the television”

“they went to Paris to see the sights”

A range of mental vision.

“in his sight she could do no wrong”

Catch sight of; to perceive with the eyes.

“he caught sight of the king's men coming over the ridge”

Take aim by looking through the sights of a gun (or other device).