I am considerably older than the age group you describe, and now have various glasses for functionality. I wish I could wear progressives, but the tunnel vision they produce is very disturbing.
I did have reservations about the size of the rear window when i test drove the PS2, but as the representative pointed out, I quickly adapted to it. It is quite adequate for me. I onluy wish the window didn't get so dirty, but the same i say for the rear pointing camera. I don;t understand why my vehicle seems to get dirty so quickly, in the rear, the space between the trunk and the rear bumper is dirty within 2 days of a car wash.
I developed cataracts fairly early in life, and had both removed. My vision is 20/20 when I squint, because I still have astigmatism, and, as a result, I do still wear corrective lenses for that. For driving I use pure distance glasses, and when nice out, i wear polarized lenses in sunglasses. I use all of my mirrors when driving, and yes, I use the mirrors and the rear camera when parking.