The apple of my eye = is an old fashioned term, meaning one's favorite person; the one you love most. Example: I love you so much. You are the apple of my eye

Oh I thought you wanted to know something about Jobs.

Originally meaning the central aperture of the eye. Figuratively it is something, or more usually someone, cherished above others. from:http://www.phrases.org.uk/meanings/the-apple-of-my-eye.html