It is hard to think of another object in our society which is both a medical device that you donât want and a fashion accessory which you do. Buying them, in my experience anyway, is a fraught, somewhat exciting exercise that starts in a darkened room, where you contemplate the blurred letters and the degeneration of your visual cortex, and ends in a bright, gallery-like space where you enjoy the spry feel of acetate in your fingers, listen to what you are told, pay more than you were expecting to, and look forward to inhabiting a new, slightly sharper version of your existing self.













