an eagle eye

eagle eye

1. Excellent eyesight, especially for something in particular. I have an eagle eye for spotting wildlife.
2. An ability to discern small details; a keen skill of observation. We need to get Sally's eagle eye on this manuscript because she'll be sure to spot any errors.
3. An attentive gaze. You need to keep an eagle eye on the kids because they will get into everything the minute you turn your back.
4. One who is apt to discern small details or pay close attention to someone or something. Ugh, I got a demerit because some eagle eye saw me with my shirt untucked during yesterday's assembly.
See also: eagle, eye
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

an eagle eye

If someone has an eagle eye, they watch things carefully and are good at noticing things. No antiques shop, market or furniture shop escapes her eagle eye. Phil's played first-class cricket for five years in England under the eagle eye of our umpires. You must watch builders with an eagle eye because some will cheat the minute you turn your back. Note: You can also say that someone keeps an eagle eye on someone or something. Managers of Europe's top clubs are keeping an eagle eye on the World Championships, hoping to snap up new talent. Note: You can also describe someone as eagle-eyed. As the band were passing through security, an eagle-eyed official spotted an 18-inch knife in their luggage. Note: Eagles have very good eyesight, and are able to see small animals or objects from a great height.
See also: eagle, eye
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012

an/somebody’s ˌeagle ˈeye

(informal) if somebody has an eagle eye, they watch things carefully and are good at noticing things: Nothing the staff did escaped the eagle eye of the manager (= he saw everything they did). ▶ ˌeagle-ˈeyed adj.: An eagle-eyed student spotted the mistake.
See also: eagle, eye
Farlex Partner Idioms Dictionary © Farlex 2017
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References in classic literature ?
Mortimer had gone over his accounts, with an eagle eye on the expense column, discovering several minor leaks, and finally, aided by Saxon, bullied him into keeping books.
The caption with the video reads: "Through an eagle eye from @burjalarab expect higher on 14 of March #FlyBurjKhalifa #MyDubai"
Soaring on electronic wings, Sutherland Lyall casts an eagle eye around for prey.
Black, a no-nonsense teacher whose voice combines ah impenetrable Rhode Island accent with the volume of a New England foghorn, possessed an eagle eye for correcting placement and pushing dancers to move organically--and she got extraordinary results from dancers of all stripes.
It is more like a 5'1" tale of a born-and-brad Texan who has an eagle eye for spotting problems in spreadsheets.
With an eagle eye on the North Carolina primary, Gore begged the EPA to back off, noting his "regret" as to any confusion regarding his previous - and still public - stance in favor of tough laws to clean up the Pigeon River.