-
They stick on using surface tension from a drop of water - IKYN.
See this thread on Yacf for all the info:
https://yacf.co.uk/forum/index.php?topic=83623.0Mine worked OK on the IPWR. The one on the right lens dropped out after a few days but it wasn't strong enough anyway. Right lens is very curved so wasn't surprised it happened. The left one, which I mainly relied on, stayed in all the way.
Stick on? How do they work? Sounds like the answer to all my prayers (except that I am both long and short sighted and have an astigmatism that means that my eyes are the shape of rugby balls)