Will Self on how wearing glasses has become something that is entirely unremarkable.

"Nowadays the acquisition of glasses", he writes, "is simply another opportunity for the conspicuous consumption we've all become so very expert at".

But he says there are drawbacks to seeing too clearly. He suggests that a National No Glasses Day might be an idea "so we can all wander about the place in blurry bliss".

Producer: Adele Armstrong.