keen-sighted vs argus-eyed

keen-sighted and argus-eyed both are adjectives.

Word	Noun	Adjective	Verb	Adverb
keen-sighted	No	Yes	No	No
argus-eyed	No	Yes	No	No

As adjectives, keen-sighted and argus-eyed are synonyms defined as:

Other synonyms of keen-sighted include hawk-eyed, lynx-eyed, quick-sighted, sharp-eyed, sharp-sighted.

keen-sighted (adjective)	argus-eyed (adjective)
capable of seeing to a great distance	carefully observant or attentive; on the lookout for possible danger
having very keen vision	having very keen vision