Watching Rip Off Britain on tv, they're talking about spectacles and the average cost of manufacture of one lens is 25p. The mark up for glasses I'd huge. For the record I just had my eyes tested and glasses made, for the first time in years, done properly first time. The cost for two pairs of high prescription glasses, thinned, anti scratch, uv coating was £50! For two pairs, amazing. Got them in Asda and I'm well impressed. So now you know. Thus is not an advert, I just wanted you to know.