Solution, please.
 

Hello,

I've made a new thread here: http://www.pprune.org/forums/showthr...hreadid=138197

Would you mind looking at it, since its medical-related?

Thank you very much.

Su - there are loads of posts here about eyesight. In particular one about 5 lines down the page at the moment. Have a look and see if they answer your questions.