Thanks for the responses.
Crab - My distance vision is fine, and I look through the tubes with the naked eye, but have the smallest glasses I can find perched on the end of my nose for viewing the instrument panel. This leaves a gap (between the goggles and the spectacles) out to the right to use an external white light reference for winching, etc. However, I'd rather not have the glasses getting in the way of my below goggle view through the chin bubble for helipad style departures etc.
Mighty Gem - I have heard the surgery won't provide a permanent solution to my presbyopia, but I'd be prepared to undergo treatment if it were able to give me, say, another 5 years of goggle flying without needing specs.
Thanks again