Definition of "keen-sighted" []

• Having very keen vision (adjective)
• Capable of seeing to a great distance (adjective)

WordNet. Princeton University. 2010.

• "He had his eyes open always to my main chance, and he was both keen-sighted and far-sighted."
• "Many of the traits that Wills saw in Whicher became the stuff of the fictional detective hero: he was ordinary-looking, keen-sighted, sharp-witted, quiet."
• "At the same time, the chandeliers and the flambeaux on the chimney-shelf shed such a flood of light on the two friends that their faces, strongly illuminated, failed, in spite of their diplomatic discretion, to conceal the faint expression of their feelings either from the keen-sighted countess or the artless stranger."