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Mountain protection -

  ****DISCLAIMER:  For informational purposes only. Readers should report any discomfort or pain to their eyes to their doctor.   Summary Solar radiation is estimated to increase in intensity by 10% at every 1,000 m altitude threshold. Exposing oneself (and one's eyes) to UVB rays at these heights is particularly dangerous. It can never be said enough: neglecting to wear sunglasses in high-altitude light environments can lead to permanent eye damage.  The 4 most common eye disorders among climbers are: photokeratitis or snow blindness, erythropsia, white-out syndrome, and corneal frostbite. All of these disorders can be prevented by making sure proper eyewear is part of your equipment when setting out into high-altitude...

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