[kevando]

Yes this is all true, but the real reason glasses cost so much is because people buy vision, not glasses. And people value vision extremely high. I started a glasses company and when I'd tell people their $900 glasses cost the eye doctor less than $100, they would give me this blank stare like "so what? I can see."

[quicklime]

I'm not sure about that. I value hydration more than vision (I could live blind, but not without water). But I wouldn't pay $900 for a bottle of water and say "so what?"

[kevando]

Yes you bring up a good point. A pair of glasses is quite different than a bottle of water.