Clean the lenses with mild soap and water first
Dry with a microfiber cloth
Use a lens-safe scratch remover made for eyeglasses
Apply a tiny amount with a soft cloth and buff gently
Rinse and dry the lenses after treatment
Try a small amount of non-abrasive toothpaste only on plastic lenses
Use baking soda and water paste only on plastic lenses
Avoid using paper towels, tissues, or rough fabrics
Avoid household cleaners, ammonia, vinegar, and bleach
Do not use abrasive powders or scrub hard
Replace deeply scratched lenses
Take the glasses to an optician for professional advice
Use a hard case and microfiber cloth to prevent future scratches