Thanks PhilM, omitted to mention that my class one days are all behind me and the only thing I use the eyeballs for these days are excitements such as reading, television and driving.
I have decided to go ahead on the recent recommendations of NICE, an organisation that I have more than a passing acquaintance with.(There is a life after flying!).
Assuming that I can still see the screen clearly I will report back at the end of July!