visual range

English Thesaurus

1. distance at which a given standard object can be seen with the unaided eye (noun.attribute)

hypernym	:	visibility, visibleness,
definition	:	quality or fact or degree of being visible; perceptible by the eye or obvious to the eye (noun.attribute)

domain category	:	meteorology,
definition	:	the earth science dealing with phenomena of the atmosphere (especially weather) (noun.cognition)