DANG, guess this old phart just isn't up-2-date on what I should be wearing.
Eyes needed glasses in 2nd grade, then to bi-focal, then to tri-focal then to Progressive with Transition and now at approaching 71yo with aero-bar usage as much as ever and mid day Fl. sun or midnight darkness I still have Prog/Trans only now with a larger lens for greater peripheral clarity. Wasn't aware that they shouldn't work as well as they do.