I have an east coast client who did a late season climb of Rainier 2 weeks ago and felt strong and prepared; however, around 13-14000' she experienced blurred vision and then felt like she was going blind. The guides sent her down before it could get any worse, and she gradually felt better and better, and 2-3 days later had no residual effects. The guides suggested she visit an eye doctor, which she planned to do as soon as she could get an appointment, but she's on the east coast and wasn't very hopeful that anyone there would know too much about AMS,HAPE, and HACE much less altitude blindness.
Anyone know anything about altitude blindness? I read people can be affected as low as 4300 meters / 14,000' but I've only ever read about it becoming serious on 8000m peaks. She's especially curious whether Diamox would help in the future.
Input / suggested reading much appreciated.
C. Schurman