On 27/08/2019 21:41, Fredxx wrote:
On 27/08/2019 17:07, Jim GM4DHJ ... wrote:
https://whiterup.com/products/perfec...rjmVX9-8QRmdC8


bet it doesn't allow for Astigmatism ...

They were initially designed for third world countries. I cam across
them 6 or 7 years ago.

Yeah, they are nothing new.

Third world countries now have testing/glazing centres though, where
they can get an eye exam and a 'proper' pair of glasses made.

These adjustable ones are handy to replace ready readers I suppose.