Interesting concept, here’s hoping. They could definitely take a bite out of the progressive market, especially for people who buy a pair of dedicated reading glasses. Comes down to how much lenses cost, how much/many options the frames come with… I suspect this will be a super niche thing, but on board for it
Dye from bugs remains an option. https://www.livescience.com/36292-red-food-dye-bugs-cochineal-carmine.html