There are a few different ways that you can remove a scratch from sunglasses. One way is to use a polishing cloth and some lens cleaner or lens polish. Find the right lens cleaner or polish in our category “Sunglasses Lenses & Accessories”.
You can also try using a soft toothbrush and some toothpaste. Both can be found in our category “Oral care”.
Another way is to use a small amount of WD-40 on a soft cloth.
Pay attention to the direction of the scratch when you are polishing it, and be sure to buff the area around the scratch as well to blend it in.