[MargaretR]

I have bought glasses online twice and been pleased with the goods.
I have a very strong prescription(astigmatism) too and prefer thin lenses.
When I started filling in my prescription details I found that one eye was 'off their scale' (it was so strong).

I emailed them and they were able to acommodate me at a small extra charge above the norm. They charge extra for thin lenses too, but even when those extras are added the glasses worked out much cheaper than a high st optician.

Another advantage I found was that you can chose a frame which is a proper fit to your nose and ears, by looking at the sizes on a comfy pair you have and ordering that size.
Opticians on the High St seem to stock frames too small for me.

There are several online opticians - I think the one I used was called
lowcostspecs*

*PS I have just googled for them and can't find the site, but there are dozens of them to browse