eagle-eyed

adjective2

1. •
   Having great visual acuity, especially the ability to see at a distance.

   • We like old signs at railway stations, and eagle-eyed John Macnab, from Falkirk, spotted one in our photograph of a Virgin Trains Class 390 at London Euston (RAIL 889). — 2019
2. •
   Keenly perceptive.