Snow blindness (or also known as photokeratitis) is a painful eye condition. The main cause of snow blindness is the exposure to ultraviolet light for too long or too often. If you are going skiing or snowboarding, wear snow goggles that are designed to block UV radiation or use equipment that generates intense light and wear whatever safety gear is recommended.
However, snow blindness is not permanent and you only need to rest your eyes and remain indoors for a few days. In rare cases, prolonged exposure to the reflected light can lead to solar retinopathy, a disorder that may result in some permanent loss of vision. So, if didn’t disappear for around 12-48 hours, it is advised to see an eye doctor.