Scratch resistant lenses are use to replace glass and plastic lenses which scratch and break easily on eyeglasses. If someone was wearing eyeglasses made of glass lenses and something hit the lens then it would shatter and go in their eyes.
What are scratch resistant sunglasses used for?
The scratch-resistant glass lenses are fully polarized to reduce glare, and filter out 100% of UV rays while absorbing 85% of visible light for a look that’s truly made in the shade. An additional coating cuts down on smudges and fingerprints if you happen to touch the lens when you’re taking them out of the case.
How are scratch resistant glasses used in space?
The DiamondHard® technology involves coating the lenses with a film of diamond-like carbon (DLC) that not only provides scratch-protection but additionally reduces surface friction, so that the lenses shed water more easily to reduce spotting.
Why do astronauts need scratch resistant lenses?
In space, there are a lot of particles and dirt that can easily damage space equipment. This is a problem since space equipment needs to be durable and clear vision is a necessity. NASA needed to develop a way to make the space equipment more scratch-resistant.
How does scratch resistant coating work?
An anti-scratch coating, also known as a scratch-resistant coating, is a clear lens coating that reduces the appearance of hairline scratches, thus preventing minor scratches that can happen easily and impair vision.
How did NASA use scratch resistant lenses?
NASA’s Dr. 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. … Wydeven coated a filter with a thin plastic film using an electric discharge of an organic vapor.
Is there such thing as scratch proof sunglasses?
There are sunglasses lenses made specifically to resist scratching. And most lenses today include a scratch-resistant coating. Polycarbonate and Trivex lenses are more impact-resistant than glass and plastic lenses, and both usually have a built-in scratch-resistant coating.
What is scratch resistant?
adjective. (of a surface or hard material) not easily damaged by scratching. ‘Perhaps the most striking feature of the phone is its scratch-resistant screen.
Did NASA make sunglasses?
In short order, a company called SunTiger was formed to market a line of sunglasses based on the NASA hawk-eye breakthrough. … The company’s sunglasses block the vast majority of harmful UVA and UVB radiation, as well as similarly damaging high-energy blue light.
What are scratch resistant lenses made of?
Anti-scratch lenses are made by coating regular plastic or glass lenses with a hard protective layer. This coating is applied to the front and back of the lenses. Many eyeglass lenses today are treated with scratch-resistant coating during the manufacturing process.
Who invented the scratch resistant sunglasses?
Theodore Wydeven, a NASA scientist discovered a coating that was very tough while working on a project for water purification for spacecrafts. Then, NASA took the coating and put it on plastic lenses and space helmets. The result was that the lens was scratch resistant!
What causes scratches on glasses lenses?
Dust mites and lint tend to cling to plastic material. Rubbing your glasses when dirt, lint, or dust is on the lens can cause scratches. For this reason, toothpaste and baking soda, which have gritty textures, won’t fix scratched lenses.
How long do scratch resistant glasses last?
One lens coating that can increase the life of your lenses is scratch resistant coatings. Use these if you tend to handle your glasses roughly or use them in rough environments. According to Dr. Moos, lens enhancements and coatings can last anywhere from a year to about two years.