Apple of the eye

the pupil.

See also: Apple

References in periodicals archive ?
Martin del Rosario shows he is a strong, independent woman, who eventually happens to be the apple of the eye of two men, in the much-awaited spin-off 'Born Beautiful.'
Summary: Mumbai (Maharashtra) [India], May 29 (ANI): Megastar Amitabh Bachchan feels the present generation of India has "immense confidence, clarity and dare" to do anything and that's what has made the country an apple of the eye of the West.
Alcantara, who captured the European Under-21 Championship MVP after his hatrick led Spain to their fourth title in the tournament, is the apple of the eye of the Red Devils' management because of his cunning ability to orchestrate plays and score goals at such a young age.
The horse in question is See You Sometime, the stalwart and stable star of trainer James Mullins, and no doubt the apple of the eye of his owner-breeders Mr and Mrs Meaden.
His first novel, The Apple of the Eye (1924), was originally published serially in the Dial.