He's 12 years older...if he's had a nip and tuck, it must have been done behind the ears, you can't see any scarring. The earlobes appear to be sagging. He seems to have lost weight. Looking at a range of recent photographs, it would appear he is deeply depressed. That's a side effect of dementia - with which I do have a certain amount of first hand experience, in family. The pupils of his eyes don't appear to be dilated, it is the iris that seems to be darker.
A simple explanation might be that he wears contact lenses...perhaps tinted.
Those reading glasses aren't very flattering:
