On 27/08/2019 17:22, Bert Coules wrote:
They do look intriguing.Â* I use and like varifocals but there are times
(and in differing circumstances) where they're not ideal and a single
prescription pair would be better.Â* These might fit that bill.

I have varifocals plus a proper set of single prescription lenses set up
for computer use. I add to these clip-ons at +1.5 and +3 diopter for
reading small text and for close-up work.

eg eBay item 172952541377

Being a bit nerdy I would worry not only about astigmatism but other
aberrations in things like this.