The evolution of sunglasses from science to style (and back again)
The technology behind shades has changed over the centuries. From Inuit snow goggles to aviators to polarized sunglasses.
Space.com16d
Solar eclipse glasses: How to check safety and use them correctly
ISO-approved solar-eclipse glasses must meet certain safety requirements: No more than 0.00032 percent of the sun's light may be transmitted through the filters. The filters must be free of any ...
Is the total lunar eclipse safe to look at? What to know about viewing the rare occurrence
While glasses were absolutely necessary for last year's solar eclipse, they are not needed to safely view this year's total ...
Hosted on MSN11mon
Why do you need eclipse glasses? So you don't go blind. What happens if you look at the sun
Do not look directly at the sun without proper eye protection. Certified solar eclipse glasses that meet international safety standards provide the necessary protection against harmful solar ...
Do you need glasses for a lunar eclipse? What to know about viewing the blood moon
If you plan to stay up to watch the total lunar eclipse on Thursday, you won't need to do much to prepare like for a solar ...
Hosted on MSN11mon
Why you absolutely cannot stare at the sun without eclipse glasses
Even when the sun is partially obscured by the moon, its rays are still strong enough to permanently damage your eyesight. The only time to look upon the eclipse without glasses is when the sun is ...