If one is to describe somebody as the Apple of My Eye, it implies that they cherish or favour someone and think more highly of that person than others. It is also commonly associated with describing or expressing feelings of love for someone.
For example. ‘I was so deeply in love. She was the apple of my eye.’
The origins of this commonly used phrase date back to Biblical times. The first known use of the phrase appeared in the King James Bible which was one of the first known translations of the Bible from Hebrew into the English language. This version of the Bible became the most widely printed in history.
Later again the phrase famously appeared in Shakespeare’s ‘A Midsummer Nights’ Dream’.
In more recent years the phrase featured as the name of song by the popular Irish band Bell X 1.