keen-sighted vs lynx-eyed

keen-sighted and lynx-eyed both are adjectives.

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

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

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

keen-sighted (adjective)	lynx-eyed (adjective)
capable of seeing to a great distance	having very keen vision
having very keen vision