From Longman Dictionary of Contemporary Englisheagle eyeeagle eyeused to say that someone is watching carefully or is likely to notice something They carried on working, under the eagle eye of the owner. → eagle
Examples from the Corpus
eagle eye• He would have to keep an eagle eye out for Freddie though.• Now Glover himself was as female as the next man, keeping an eagle eye on boys.• Count Trepolov also was keeping an eagle eye alternately on Lord Westbourne and his lady, not on savouries.• I gave Leslie Brown her list back and wandered around under her eagle eye looking at the horses.• For once, Beatrice's eagle eye failed to detect the tenderness in Timothy whenever he spoke to Topaz.• Under Leonore's eagle eye he had examined the suddenly produced delivery note and made only a cursory inspection of the truck.• Its pages were scanned with eagle eyes. 