The ultraviolet (UV) rays and bright sunlight reflected off snow or ice can literally burn unprotected human eyes, particularly at high altitudes, where UV rays are especially intense. The resulting condition, known as snow blindness, may not be noticed for several hours following exposure. Then, pain and inflammation set in, accompanied by a temporary reduction of vision that may last several days while the surface of the cornea heals. How did the Inuit traditionally prevent snow blindness? Discuss