The phrase "apple in someone's eye" always sounded a bit odd to me so I looked it up today. Apparently you can find it in Shakespeare's Midsummer Night's Dream and it means "something that is especially beloved and precious". So when I come across these phrases in the scriptures, they now begin to make more sense:
Psalm 17:8-9
7 Show the wonder of your great love,
you who save by your right hand
those who take refuge in you from their foes.
8 Keep me as the apple of your eye;
hide me in the shadow of your wing.
and
Proverbs 7
1 My son, keep my words
and store up my commands within you.
and store up my commands within you.
2 Keep my commands and you will live;
guard my teachings as the apple of your eye.
In other words, if we hold the words and the teachings of God as precious and valuable in our sight, we will be his pride and joy and "especially beloved" in His eyes.
