Mell What are sun glasses used for?
The most important benefit of wearing sunglasses is that they protect your eyes from ultraviolet (UV) light. UV light can have harmful effects on the eyelid, cornea, lens and retina.
Why did NASA invent sunglasses?
NASA researchers picked up on the latter fact and used it to humans’ advantage. Their work ultimately led to the development of sunglasses that protect against eye damage by blocking out the most harmful wavelengths of solar radiation.
Why did NASA invent scratch resistant lenses?
Scratch Resistant Lenses were used in space in to keep space equipment from getting scratches, especially helmet visors. These space helmets visors were developed so that when astronauts were exploring on the moon, they could see what they were doing and not have their vision affected by its environment.
Why you should not wear sunglasses?
Sunglasses that lack necessary UV-blocking lenses will cause your pupils to dilate. This increases the amount of harmful solar radiation your eyes are exposed to, increasing your risk of developing eye conditions like cataracts, retinal tissue damage and macular degeneration.
What sunglasses do astronauts wear?
Voyager™ is a trademark of Silhouette International Schmied AG. The sunglass lenses worn by NASA astronauts are considerably darker than the commercial lenses, with a thin gold coating that offers total protection, not only against ultraviolet radiation, but also against the harmful infrared radiation in space.
Did NASA invent polarized sunglasses?
NASA needed a way to protect astronauts’ eyes from unfiltered light in space. Not long after, Eagle Eyes Optics adopted this technology to create sunglasses that everyday people can use to protect their vision. Today, Eagle Eyes Optics offers scores of styles that all incorporate these polarized lenses.
Who invented scratch resistant glasses?
Ted Wydeven
Ted Wydeven of the Ames Research Center generated the technological seeds for the first scratch-resistant plastic lenses while working on a spacecraft water purification system.
Why did NASA need to make sunglasses with plastic?
They required making glasses with plastic because it is cheaper and more durable. NASA needed a special coating because there are air and dirt particles in space which can damage the astronaut’s visor. NASA hired a sunglass manufacturer which created a special coating which made its sunglasses 10 times more scratch-resistant.
What was the purpose of the first sunglasses?
These sunglasses were made to protect people’s eyes from harmful rays of the sun.Polarized sunglasses first became available in 1936, when Edwin H. Land commenced using his patented Polaroid filter when making sunglasses. Sunglasses played a significant role during the World War II, when Ray Ban sunglasses were made, using polarization.
When did the first polarized sunglasses come out?
These sunglasses were made to protect people’s eyes from the sun’s rays. Polarized sunglasses first became available in 1936, when Edwin H. Land began using his patented Polaroid filter when making sunglasses. Sunglasses even played a significant role during the World War II, when Ray Ban created anti-glare aviator style sunglasses,
What kind of sunglasses were used in China?
In China, sunglasses were used in the 12th century or possible earlier. These sunglasses were made out of lenses that were flat panes of smoky quartz. They offered no corrective powers nor they protect from harmful UV rays but did protect the eyes from glare.