MikeTX wrote:i'm not sure this was a case of altitude-induced retinal hemorrhaging. the deceased climber had this same experience before. the article made it seem like a recurring problem for him.
a friend of mine used to get migraines that would cause his vision to be temporarily blurred to the point where he was essentially blind in one eye.
My take was that since it was a recurring problem, he happened to be more at-risk for the retinal problems. And altitude would only aggrevate the situation. I doubt we'll ever know for sure, though.
I've had migraine headaches where I lose a portion of my vision. Actually, the doctors believe that the start of a migraine, when the blood vessels contracted, is what caused my occlusion, which led to my retinal hemorrhaging.
John Duffield wrote:For me, I take away from this, assuming coming back alive is your top priority, how important it is to listen to your body. Up where breath comes in a long gasping tear, you have to worry about yourself. Everyone up there is at the edge of human endurance. Only he can know what was going on in his body, but my suspicion is, he ignored signals that there wasn't half his life force remaining, to get back down.
That's hard to say. A person cannot physically feel retinal hemorrhaging. And from the time a person noticed any vision problems to the time they were completely blind could be as little as a few minutes. Probably as long as it was from his first stumble to the time when he couldn't see the ladder. And, the bad part is that in certain environments, a person may not even notice a blind spot until it is quite large. Maybe at the time he stumbled, it was because of a blind spot, but he didn't even realize it. It's hard to explain what a blind spot "looks like" to somebody who has never experienced one. They don't look like anything. It's not just a big obvious black hole. Even if it was caused by a migraine, that's still not necessarily obvious. The pain of a migraine may not start until after the vision problems have come and gone for some time.
On the other hand, if he had the problem in the past, there may have been signs that he had on the ascent, that he should have recognized. I know if I ever experience what I experienced in the hours before my vision loss, I will stop whatever I'm doing and go directly to the eye doctor on call. No passing GO, no collecting $200.