MAGIC GLASS
Sep 15, 2018
2 minutes
By STEVE ANDERSON
Photography by
DREW RUIZ
Arthur C. Clark famously said that any sufficiently advanced technology is indistinguishable from magic. That certainly applies to face shields, goggles, and glasses that automatically darken. That sorcery has existed for decades, but it has been refined and is more widely available now than ever. This change of lens shade as light increases is called photochromism, and it depends on a reversible
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