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.

IIRC they showed something similar on tomorrows world a long time ago.

They have also been suggested for third world countries too, using cheap
syringes for the fluid.