At a price, though: high-index plastic has much higher dispersion than the lower-index materials. This causes a greater "prism effect" near the edges of the lens, which interacts very badly with the new RGB-backlight monitors [0].

[0] http://scottlburson2.blogspot.com/2016/01/lcd-backlights-and...

I never got Coke bottle lenses. Those are for people who have no peripheral vision. The Coke bottle design is supposed to bring the peripheral into the area the patient can perceive.

What drive me nuts about my glasses is that it effective took my peripheral vision away, making me seem way more clumsy and uncoordinated than I would otherwise have been.