Thought i would start this to share what we have learnt. So others don,t make the same mistakes.
I just DNF,t The Fellsman Hike for a reason I had not even considered but now know how to avoid. I lost the vision in one eye and the second one was becoming blurred due to 13hrs exposure of severe and dry wind action on my eyes! I got to the stage where I could not see the ground properly to place my feet. Mine was not the only case, several other runners DNF,t for the same reason.
The winds were predicted and if I had known I would have worn wrap around cyclist,s specs .
Not every one was affected so perhaps some of us are more susceptible than others. The condition crept up on me. (I at first thought it was getting foggy) It was pretty scary at the time but 24 hrs later I have fully recovered.