Quick-sighted is an adjective that refers to having sharp or keen eyesight. Synonyms for this term include eagle-eyed, sharp-eyed, perceptive, observant, keen-sighted, acute, discerning, and astute. These terms all describe someone who is able to perceive things clearly and accurately, often noticing details that others may miss. These synonyms are useful for describing someone with exceptional visual abilities, such as a pilot or a sharpshooter. Additionally, they can be appropriate in literary contexts, where authors may wish to evoke a sense of heightened awareness or perception in their characters.