This time of year, the vast majority of the United States sees an incline in temperature which means the sun is getting hotter and more dangerous for your eyes and skin. While you are indoors or underneath some form of shade, you can absolutely get away with wearing glasses that have a simple coating of ultra violet protection. However, if you are outdoors and are in direct contact with the sun - you need more protection. If you are outside playing sports, tanning in the sun, or taking a nice long walk - you will need something heftier and more protective than glasses. You need sunglasses.