Re: Perhaps a silly question, re: contacts (for eyes)

I would recommend talking to your ophthamologist in that case. As far as I know, no one on this site is an eye doctor or eye surgeon. Personally, in your situation, I would insist on a face to face discussion with a person who has the appropriate diploma on the wall, and get a second and third opinion, including at least one who spends time in the woods.

Or, you may just have to do what Barb and many others I know who spend lots of time in the hills and woods (including many I have spent time with in the Alaska Range and Antarctica) - use glasses during those occasions.

Or maybe spend the big bucks on the laser guy (I hear mixed reviews about whether this works for high altitude or not, even with the latest eye sculpting techniques, so have a loonnnggg talk with eye doctor types who don't have a vested interest in lasers and are outdoor types themselves).

In any case, I think this goes way beyond anything I would trust hearing from someone posting on the internet, unless I could establish their bonafides independently. Your eyes are far too valuable (at least, I consider my eyes far too valuable for internet advice).