eagle-eyed

Infinitive complement

spot: There is just one minor difference between the photos, although you'll need to be eagle-eyed to spot it.

Modifies a noun

• viewer: Eagle-eyed TV viewers will have spotted him last year on Missy Elliott's " Road To Stardom " talent competition.
• reader: A couple of the more eagle-eyed readers spotted a couple of broken links from the reviews here.
• member: Eagle-eyed members of the audience will spot these six paintings on the set of our production.
• reporter: Thanks to our roving eagle-eyed reporters for letting us know.
• fan: But eagle-eyed fans who saw the soap have still emailed Gorman in their hundreds, filling his in-box and crashing his computer.
• user: Eagle-eyed message board users have exposed the rumor as a hoax.

Modifying Another Word

so: So eagle-eyed were the raiders that, when they finally got upstairs, they quite failed to notice the bulging carpet.