Quick definitions from WordNet (quick-sighted)
▸ adjective: keenly perceptive or alert ("Quick-sighted into the faults of the time- Leonard Bacon")
▸ adjective: having very keen vision ("Quick-sighted as a cat")
▸ adjective: keenly perceptive or alert ("Quick-sighted into the faults of the time- Leonard Bacon")
▸ adjective: having very keen vision ("Quick-sighted as a cat")