Hello-

Of course I should go to my doctor and I will. But, I was hoping to get any input as well.

I am 46 years old, I've day hiked Whitney 3 times, Baldy 30 times and ran/walked a few 50M Ultras and always lost. I've been lucky to have no real injuries or complaints outside of being slow. I've usually faired better than most above 12K in the past.

In the last year, in 3 of 4 times hiking above 8K I have an acute symptom. I develop somewhat of a tunnel vision of sorts. My peripheral vision contains appears to become kind of flashy or blotchy. When I slow down or stop the symptoms disappear.

I was hoping to go high again this summer but now I'm thinking it may not be a good idea. I would be very interested in some feedback. Thank you- Mike