argus-eyed

Adjective (2)

1. having very keen vision“quick-sighted as a cat”Synonyms: hawk-eyedkeen-sightedlynx-eyedquick-sightedsharp-eyedsharp-sighted
2. carefully observant or attentive; on the lookout for possible danger“a policy of open-eyed awareness”“the vigilant eye of the town watch”“there was a watchful dignity in the room”“a watchful parent with a toddler in tow”Synonyms: open-eyedvigilantwakeful