Is there a way to make my sunglasses scratch-resistant?
Is there a way to make my sunglasses scratch-resistant? Reflective sunglasses often have a mirrored look. The lenses in these sunglasses have a reflective coating applied in a very thin, sparse layer — so thin that it’s called a half-silvered surface . The name half-silvered comes from the fact that at the molecular level, there are reflective molecules speckled over the glass in an even film, but only half of the glass is actually covered. The half-silvered surface will reflect about half the light that strikes it, letting the other half go straight through. Often, the mirror coating is applied as a gradient that gradually changes shades from top to bottom. This provides additional protection from light coming in from above, while allowing more light to come in from below or straight ahead. This means that if you are driving, the sun’s rays are blocked but you can still see the dashboard. Sometimes, the coating is bi-gradient, shading from mirrored at the top and bottom to clear in t
