those who wear varifocals look like Stevie Wonder looking for the sweet spot in the lens
That's brilliant, only because I know the feeling exactly!
I vote for Varilux lenses by Essilor, I've used them for years and they are the lightest, easiest to adapt to and most comfortable. They can actually craft lenses to suit the environment the wearer most commonly experiences. Google Varilux Ipseo for a list of nearby opticians.