It made me chuckle to see that a local firm of opticians has a offer of 40% off sun glasses right now!
Considering that it has rained persistently since the end of September and that we can count on fewer fingers than those of one hand the times we have actually seen the sun in the dreich weather we have been having, I somehow don't think they will sell a lot of sun glasses.
I have been caught out by the low sun this week and the sun visor in the car is nothing like low enough to counteract the dazzle. However, I'd find it difficult if I wore sunglasses because although the sun is dazzling, you quickly dive into deep shade in which sunglasses would be dangerous. I do have a pair of clip-on sunglasses which can be flipped up when I encounter shade - but I put them away at the end of summer and goodness knows where!