Photo: Messing around with polarizing filters and eyesight, I noticed the strain areas in my reading glasses revealed by the polarized light from the LCD and a sunglass lens held over the smartphone camera...
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Rupert Goodwins
Public
Messing around with polarizing filters and eyesight, I noticed the strain areas in my reading glasses revealed by the polarized light from the LCD and a sunglass lens held over the smartphone camera...
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