In reply to Rigid Raider:
> Here's my experience:
> Contact lenses: fiddly and you're in trouble if one drops out. Also you've got to carry the little containers and bottles of liquid. Worst aspect of contacts is dust, so if a gust of wind blows dust in your face you're in agony for a few minutes. Finally the varifocal lenses are difficult to use and probably expensive.
Not normal these days. For climbing, I would generally recommend daily disposable soft lenses which don't drop out or get particles behind like rigid lenses (which are a nightmare for this). No containers, no losing lenses, and generally perfectly comfortable (i.e. not noticable). As I said, the multifocals will either work, or they won't - and if they don't, monovision (non-dominant eye corrected for close work) can work well for many people. Pretty cheap too if you're not using them every day.
> Varifocals: wonderful if fitted by a decent optician and not a budget high street chain.
It's pretty easy to fit a pair of varis properly, but you will get what you pay for. A cheap pair from a high street chain will be fairly crap in comparison to a £500 pair, and if they're not fitted right they'll be useless. But you shouldn't have to avoid all chains just to get a decent pair of varifocals! At our place (chain), we sell fancy custom-made frames with the very best lenses available.
I'm all for supporting independent opticians and in many cases you'll get better service, but you can get top of the range glasses fitted accurately from the chains too! The places to avoid are opticians who haven't kept pace with changes in the industry and don't have good up-to-date testing equipment (e.g. retinal camera) or fit the most most modern contact lenses.