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“Snow reflects UV light, which is a problem, which is why humans get snow blindness.”

Haidri said a Pakistani mountaineer, Asif Bhatti, was stranded on Nanga Parbat because of snow blindness, and efforts were underway to rescue him.

He was relieved when I told him a temporary case of snow blindness was the worst that had happened to the couple from San Jose State.

Severson hadn’t brought sunglasses and didn’t consider the threat of snow blindness until the drive home, when he felt like “screaming.”

Her skin glowed bright enough to cause snow blindness.