I used to read the Guardian in order to challenge my settled opinions but in the end I gave up because it is just too annoying. However this is an excellent article about technology and consolidation in the spectacles industry and the potential benefits and risks to the global health.

If you have been wearing glasses for years, like me, it can be surprising to discover that you perceive the world thanks to a few giant companies that you have never heard of. Worrying about the fraying edge of motorway lights at night, or words that slide on the page, and occasionally spending a fortune at the opticians is, for many of us, enough to think about. And spectacles are unusual things. It is hard to think of another object in our society which is both a medical device that you don’t want and a fashion accessory which you do.(more)