Polarized sunglasses can be an expensive investment, depending on the brand you buy. Even if you didn't spend a lot of money on them, scratches on the lenses can limit your ability to see well. Fortunately, there is a quick-fix home remedy to repair the scratches on your sunglasses, making them less noticeable to you and the outside world. Methods for repairing plastic and glass lenses differ. Make sure to know what type of lenses you have before attempting repair.

Wash your polarized sunglasses under warm, running water, applying a dot of dish detergent to each lens and gently rub it around. Rinse away the soap and dry the sunglasses thoroughly with a microfiber cloth.

Apply a coating of scratch remover polish. If that's not available, use petroleum jelly, furniture polish, or non-abrasive white toothpaste. Any of these products may fill in the scratches, making them less noticeable.

Rub the coating in a circular motion around the lenses with a microfiber cloth for five to 10 seconds and then inspect the lenses to see if the scratches are still visible. If so, repeat the process.

Wash the glasses in warm, soapy water again to remove the oily residue from the lenses and thoroughly dry them with a microfiber cloth.

Squeeze a small dab of white, non-abrasive toothpaste onto a dry cotton ball.

Rub the toothpaste gently in circles over the scratch on your lenses for about twenty seconds.

Wipe the toothpaste off with a clean, dry microfiber cloth.

Turn the microfiber cloth over to reveal its clean, unused side. Dampen the cloth and wipe down the glass lenses with it until all the toothpaste residue is gone.

Repeat the process until the scratches are gone.