the line at which the earth or sea seems to meet the sky; the limit of one's knowledge, experience, thinking etc

skyline, extent

the power of seeing; the distance within which seeing is possible

ability to perceive with eyes

the ability to see or be seen; (a picture, photograph etc of) an area seen from a particular position or place; a personal opinion, thought or observation; to look at, examine, (something); to consider (something)

something that is seen

a distant view; a series of scenes, events etc that one can look back on or forward to

view