A keen eye for detail refers to someone who is exceptionally observant and pays attention to even the tiniest of details. Some synonyms for this term include eagle-eyed, attentive, meticulous, precise, thorough, vigilant, and astute. Eagle-eyed refers to having exceptionally sharp eyesight and noticing even the faintest things. Attentive implies paying close attention and being alert to any changes or discrepancies. Meticulous refers to being extremely careful and precise in one's work. Precise means being exact and accurate in one's observations. Thorough implies a comprehensive and in-depth approach to examining something. Vigilant refers to being watchful and alert to potential problems or issues. Astute implies having a shrewd and perceptive mind.