Alva Review-Courier -

“Any sufficiently advanced technology is indistinguishable from magic” -- Arthur C. Clark.

Just as batteries have grown in capacity and longevity, computers from novelty to necessity, and diaries with darkest secrets to social media with a “let it all hang out” mentality, l have always been curious about self-darkening glasses, goggles and welders' face shields. What a great idea to prevent exposure to bright light with the effect of preventing eye damage and slowing-down the cataract process!

The “sorcery” of photochromism reminds us of the chameleon’s ability to change color back and forth b...