IMHO, eye glasses and or sunglasses along with a "take a look" rear view mirror are about the most important safety equipment you can wear. The "take a look" mirror will help you with situational awareness but you will need to take the time to learn how to use the eye glass mounted rear view mirror, and it does take sometime to get use to. The eye glasses and or sunglasses will help protect your eyes from debris.
I never leave home without glasses and rear view mirror.