Well, I think you got snow blindness. It is caused by too much exposure to the sun's UV rays. As we know, snow field can reflect sun light to the most degree. so it is a wise decision to wear glasses to protect our eyes. Snow blindness can cause tearing of eyes, eye pain, red eyes etc. Snow blindness can cause a temporary or permanent loss of vision, so it is very important to have proper protection. If your eyes have already hurt, you can put any material to prevent every possible light entering your eyes. Surely, if it is possible, go to see the doctor, and he/she will give you some specific advises.