Only need glasses to read and write, can't wear them the rest of the time because then I go all woozy and swerve around like having had a lot of wine, but also never have them in the right room at the right time - or out with me at shops when trying to check the labels on chicken dippers and the like. Can I wear them on a chain - not a chain exactly but the current equivalent - around my neck or is that indefensible?