Thanks Tees,
Just read the CAA rules on Contacts and it looks like a non starter as I would need a month off flying getting used to the contacts.
I think I shall have to put up with glasses until I retire in 4 yrs. And then I think I might splash out on some laser eye surgery.
When I googled contacts and NVGs, apparently some time in the future we'll be flying around with Night vision contact lenses with built in HUD! Wonder if they'll be daily disposables!!