watch with an eagle eye

watch somebody/something with an eagle eye

also watch somebody/something with eagle eyes

to watch someone or something very closely and carefully

Usage notes: An eagle is a large bird which can see very well.

The teacher was watching the children with an eagle eye, making sure they behaved themselves.

Name	Pronounced	Usage
Vilmos	VEEL-mosh	Hungarian
Andronicus	-	Ancient Greek (Latinized)
Nirmal	-	Indian, Hindi, Marathi, Tamil, Telugu, Kannada, Nepali
Eleftheria	-	Greek
Lilavati	-	Indian, Hindi (Rare)
Sunita	-	Hinduism, Indian, Hindi, Marathi, Nepali