On 08/12/2013 10:03, Gefreiter Krueger wrote:


It's just odd that your eye gets the worst of it and not your face's
skin. Yet if you lie in the sun your face gets it first. Then again
you don't stare at the sun for a few hours, your eyes are closed most of
the time you lie on a beach.

Its worth keeping in mind that the wavelength of the UV in question also
has an effect. For example UV A (400 - 350 nm) penetrates the skin
deeply, but does not cause tanning or redness. It does however cause
chemical breakdown products that are highly reactive and which can in
turn cause skin or DNA damage. UV B will cause tanning / sunburn, in the
short term, but can have longer term effects like causing cataracts
which may not manifest for years.




--
Cheers,

John.

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