SIGHT

sight-line /ˈsaɪt laɪn/ (n):

# (also line of vision, line of sight) ​an imaginary line that goes from somebody’s eye to something that they are looking at.

There was a column directly in my line of sight, so I could only see half the stage.

avert /əˈvɜːt/ (v):

# avert your eyes/ gaze/ face (from something): to turn your eyes, etc. away from something that you do not want to see.

She averted her eyes from the terrible scene in front of her.