Quote:
Originally Posted by brecklundin
... (you know things like vitamin D synthesis due to sunlight through your eyes).
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Skin. It's through your skin.
Back to topic, yes, if you sit outside in tropical latitudes, I can definitely understand you want a dark reader. But.... that brings another potential problem: overheating of the device. At least in direct sunlight. I guess it would be all right if you read in the shade.
Added: I don't know how you can stand the heat of the sun. Sunlight is wonderful but temperatures over 25 C is just too much.