I have a pair of prescription sunglasses that are polarised. I wear them for driving only. I wear specs anyway, I realise that they don't protect me from UV very well but I dislike seeing the world through artificial shading. I'm having my eyes tested shortly so I suppose I'll be told off. I get told off for everything: using sunscreen on my head only, for using the wrong stuff to de-wax my ears, wearing sandals, wearing shorts, not putting enough clothes on in cold weather, staying up too late, getting wet when I could have used an umbrella...