Do scratches on eyeglasses naturally get bigger?

Question

If you don't do anything to make the scratches bigger, like dropping them, I mean. Think of a crack on glass: the natural tendency is that even a small crack can quickly grow large with even a very light tap. Do scratches on lenses behave the same way? (I believe I have high resin lenses)

Answer 1

It is a little unclear from the question whether you discussing a scratch, or a crack, in your glasses. Once a crack has started in either glass or plastic (whether is eyeglasses or a window) it has a tendency to grow longer with the slightest provocation. Slight flexing, stress from temperature change, or even minor impact, that normally would cause no damage, can make the crack go completely through the object.

If you are referring to scratches on a lens, they shouldn't get longer or deeper with time, but they will substantially weaken the material and make it much easier to crack than would normally be the case. This is how they "cut" glass at the hardware store; they actually make a scratch where they want it to break and snap it off; it breaks cleanly along the scratch (while, it does almost all the time). If your glasses were scratched and you dropped them it could very easily become a crack.

Answer 2

There is a hardness scale for components, with talc being on the backside and diamond on the best. Hard will scratch tender or the identical. Particles of grime within the air are product of silicate, the identical stuff that cup is product of. That is why glass and plastic will come to be scratched through the years simply sitting there. If you wish scratch-evidence, get them to grind diamond lens for you, I'm certain they may be able to do it very cost effectively.