In reply to Pete Pozman:
I suspect this won't be a very helpful reply, as I'm sure you've considered this before, but just in case... I struggled with glasses in the mountains for quite a few years, both with goggles and with Cat 4 glasses for use on glaciers etc.
My solution now is to go with contacts. I really struggled to get used to contacts, and for years struggled to get them in – with it sometimes taking half an hour. It's fine now and I don't think twice about it any more. They have made such a difference that I think it's worth persevering with if you've tried them and haven't got on with them in the past. This is on the assumption that contacts solve your particular vision issue and your optician is happy to prescribe them to you.
You can get contacts that you can keep in all week, which is very helpful if you're not staying somewhere with washroom facilities. I've never had issues with contacts in the cold, but I've heard others have.
Something to think about, perhaps?
Mehmet