[ghaff]

Are vision insurance benefits really widespread enough to make a big impact? I have what I believe to be one of the big ones through my employer and a small number of local places even took it.

I suspect it's much more about being a fashion business which it's hard to opt out of. Non-prescription sunglasses can also be very expensive at (I assume) eye-watering margins. (Owned in many cases by the same brand TBF.)