I have indeed paid considerably more than £70 for a winter coat... And a summer coat. I am going to see if I can find something in the middle, not quite so extravagant, but I am keeping it open as a serious option.

but you wear your glasses all the time
This is a useful sentence in thinking about it, because actually I don't wear my glasses all of the time, because I don't like wearing glasses. So something that addresses the twin issues of comfort and vanity does offer genuine benefit.