A member asked:

How does sunlight affect the skin aging process?

3 doctors weighed in across 2 answers

Causing wrinkles: Uva is the one causing significant wrinkling which looks "aging". Uva also causes "solar elastosis" which makes skin look old (slightly yellow orange-skin look alike).

Answered 4/9/2014

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Dermal elastosis: Chronic sun exposure causes 1) thinning of the deeper, more elastic layer of the skin (dermis); 2) fine lines; 3) dyschromias (sun spots); 4) solar bronzing (overall dull yellowing); 5) keratosis ("barnacles").

Answered 7/11/2013

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