I was reading the novel: No Way Down by Graham Bowley, which is a detailed account of August 2008 K2 tragedy. There was a survivor named Wilco Van Rooijen, who eventually was rescued up somewhere between camp IV and camp III. He was suffering from snow-blindness, which contributed majorly in he getting disoriented.
I wonder what could be done at such altitudes where you are absolutely far from any medical facility/assistance, and probably need to carry on a little further down in order to get at least evacuation by air.
What are the symptoms and what are preventive measures and what can be done in order to limit the damage?