When millions of Americans turn their faces skyward to witness the nation's first coast-to-coast total solar eclipse in a century, many will reach for specially designed sunglasses, but experts caution the public to stay clear of unsafe counterfeits.
While makers of certified, safety-tested solar eyewear rushed to meet surging demand before the August 21 eclipse, astronomers and optometrists have warned of defective knockoffs flooding the market.
Bogus glasses have come stamped with forged logos of reputable manufacturers or with phony safety labels. Experts advise buyers to go to the website of the American Astronomical Society to seek out reputable sellers.
Staring at the sun without proper filtration, even when it is partially obscured by the moon during an eclipse, can damage or destroy photo-receptor cells of the eye's retina, leaving blind spots in a person's field of vision.
Special eyeglasses made with proper solar filters allow viewers to safely gaze at the sun for unlimited duration. Made from an extremely opaque black polymer film containing fine carbon powder, true solar-safe lenses are designed to screen out 250,000 times more visible light than would otherwise reach the naked eye. Prices range from as little as 99 cents for a pair of paper-frame glasses to $20 or $30 for a more stylish plastic set.
Subscribe to UzReport.uz
in Telegram, to be the first to know about the main news and important events of the day.