If you constantly drop your eyeglasses, you can switch to a TR90 material for more flexibility. As a result, the frames are much more resilient to bumps and other damage. Regardless of how often you drop TR90 glasses, you'll likely not get any scratches.
A pair of TR90 glasses can withstand temperatures of up to 400 degrees. Even if your frame accidentally comes in contact with a fire, it will not get burned or melt quickly.