>At one o'clock in the afternoon, the British climber Peter Kinloch was on the roof of the world, in bright sunlight, taking photographs of the Himalayas below, "elated, cheery and bubbly".
>But Mount Everest is now his grave, because only minutes later, he suddenly went blind and had to be abandoned to die from the cold.
>As the team descended, Mr Kinloch's guides noticed that he seemed to lose co-ordination. He would slip and stumble, then resume walking normally. After an hour, he made a surprising request to the team leader, David O'Brien, to be shown how to get down the ladders. At first he said he was having difficulty seeing, then he admitted that he could not see anything.
>It took four hours for Mr O'Brien and a sherpa to help the stricken climber down to Mushroom Rock, barely 1,000ft below the summit. Two more sherpas arrived and for the next eight hours they all struggled to bring Mr Kinloch,28, down the mountain, administering drugs and oxygen. But they were now dangerously close to needing rescue themselves, and had to abandon him and struggled back into camp at 5.30am, exhausted and suffering from hypothermia and frostbite
>Retinal haemorrhages – bleeding from the cells at the back of the eye – are a relatively common complaint of mountain climbers. High altitude causes the blood to thicken, increasing blood pressure, which can lead to the seepage of blood from cells into surrounding tissues.
>Some researchers have found that more than a quarter of climbers on an Everest expedition are affected by retinal haemorrhages. Normally, they are minor, with no noticeable effect on vision, and resolve themselves within weeks of a return to low altitudes. But in Peter Kinloch's case it appears the effects were acute and extreme, causing total loss of vision, which led to deadly consequences.
This kind of shit also scares me away from climbing.