The Snow blindness reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Snow blindness

Snow blindness is a painful condition caused by exposure of unprotected eyes to sunlight reflected from snow. This is especially a problem at high altitude and polar regions.

The problem is also related to the condition arc eye sometimes experienced by welders.

Here are some guidelines to use when choosing a good trekking/mountaineering pair of sunglasses:

- 99-100% UV absorption - Polycarbonate or CR-39 lens (lighter, more comfortable than glass) - 5-10% visible light transmittance - Large lenses that fit close to the face - Wraparound or side shielded to prevent incidental light exposure

See Also

• Winter sport

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