what does this phrase mean?

“you are the apple of my eye.”
this is a sentence of a lyric.

You are my favourite person. You are perfect and can do no wrong.


Could you explain more Mr. Kitosdad?

You are the favourite child of your parents in your whole family.

"You are the apply of your father’s/mother’s eye, is a well known phrase in England.

The apply? I don’t think it is a noun and has relation with apple. Anyway, I’ll try to memorise both.

Don’t memorise “the apply of my eye”!!!
Kitosdad made a typo. He meant to write “apple”

Are you revenging yourself on Mr Kitosdad? What about your terrible typos everywhere?!

Dear me, Haihao, you really are developing quite a chip on that shoulder of yours.