4. Seek out recycled shades
While buying secondhand shades might seem like the greenest way to go, Dr. Monica advises against buying used frames unless they are marked with a sticker that says they block the proper amount of UV. If there isn’t a tag, you can’t be sure they’re protective unless you bring them to an eye-care expert who can check them with a photometer. If it’s time for a new pair and you want an ecofriendly choice, ICU Eyewear makes sunglasses from reclaimed materials that cost only $21.95. And iWood’s frames are made from sustainable wood, though the price ($350) is pretty steep.