/ Running and glasses
Running I just cope without, both my eyes are about -1.75, so it isn't too bad. Walking and climbing I just wipe them every so often.
It depends how hard you run, jogging isn't a problem, anything more and I find them uncomfortable and they tend to fall off.
I am very short sighted -8 and -7.
I've never had a problem with my glasses not staying on my face when running, even on rough, off-road runs. Light (frameless?) lenses help, though I know that for strong prescriptions these can be very expensive.
Rain and misting can be a bit of a problem occasionally, and heavy rain in the dark is a serious issue. I've just started wearing a cap when it's wet, which helps.
For fell races and long road races I do tend to put contacts in though. My vision isn't as good, but it's good enough. I tend to make large-print maps for fell races.
Oh, and make sure your glasses have separate nose pieces rather than ones that are built into the frame (sorry, that might be obvious). You can get pads with varying degrees of softness / grippyness and it's worth experimenting. You should, I think, be able to get them fitted so there's no movement at all when you run.
I find that in cold weather if I keep moving they don't mist up. It does mean if I stop I have to take them off, though. Rain, well, not a lot you can do bar clean them regularly.
Depends on the shape of your nose. I find a lycra type glasses strap (fits over the ends and round the back of the head) effective for keeping them in place. Would also be useful if you wear yours when climbing (I tend not to as I don't need them to see rock/holds close to my face).
I've got some, which I use for climbing, comfort is the main thing with running.
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