They’re called Convex because they have a mound in the middle to help you see around a wider radius. You can also see they have an orange visor at the top. They don’t come with sunglasses so we put a visor over the top to help reduce sun glare. They’re not much good for doing your hair or makeup, but terrific for seeing people or images on blind corners or walls. These could save a nasty crash just by being mounted in the right place so drivers and pedestrians can see each other coming.