This is a pinguecula. It is a type of scar tissue that develops from chonic exposure to UV light, dust, and wind. It is believed that it is mostly light from the side that causes this, so it is very important to have good sunglasses that wrap around and block the sides. We carry Kaenons and Rudy Projects as well as others, like Ray Bans, and Maui Jims. Kaenons are the best! Lightweight, really stylish, polarized, with anti-reflection on back side so you don’t see your eyes.