Hi,
I have 2x2 on my glasses. Two pairs of COMPUTER glasses (not reading, so distance is more like 24 inches or so), and then two pairs of DISTANCE glasses for driving.
The Computer Glasses, were one at work and the other at home, so I would not forget. The Distance, one is shaded/colored dark, and the other is regular. I mostly use the shaded glasses, even at night while driving, because they filter out glare and I see better with it, with the surgically repaired eye.