argus-eyed

adj

1. carefully observant or attentive
   1. a policy of open-eyed awareness
   2. the vigilant eye of the town watch
   3. there was a watchful dignity in the room
   4. a watchful parent with a toddler in tow

   Synonym:    open-eyedvigilantwakeful

2. having very keen vision
   1. quick-sighted as a cat

   Synonym:    hawk-eyedkeen-sightedlynx-eyedquick-sightedsharp-eyedsharp-sighted