My grandmother has been scaring me with her tales of her visits to the opticians. Apparently because she has been wearing sunglasses since she was 15 her eyes are in tip-top condition. I am 25 and have been wearing sunglasses for about a year because of some vague fear of eye wrinkles. This means that I have to get on the sunglasses wagon asap otherwise I will be beset with cataracts and worse, ...