Argus-eyed used in a sentence

having very keen vision; "quick-sighted as a cat"

See also: hawk-eyed keen-sighted lynx-eyed quick-sighted sharp-eyed sharp-sighted

carefully observant or attentive; on the lookout for possible danger; "a policy of open-eyed awareness"; "the vigilant eye of the town watch"; "there was a watchful dignity in the room"; "a watchful parent with a toddler in tow"

See also: open-eyed vigilant wakeful