Both my father and my grandfather where drivers, and over time ended up with a wrinklier left hand compared to the right hand, due to sunlight exposure over 40+ years while holding the steering wheel with the left hand. I googled for sunlight exposure through a glass window and I get contradictory answers either stating either that most glasses filter out UV-light that affects skin tanning and ageing or that the effect of sunlight on skin is pretty much the same if it is direct or through a glass window. So, are the effects of sunlight through a glass window different from direct sunlight exposure?
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