I suggest you to get a pair of ski goggles. They mainly have two functions: eye protection and wind wind resistant. When you ski at high speed in sub-zero temperatures, the biting wind and snowflakes are unbearable to the naked eye, so ski goggles are needed to protect your eyes.
You should certainly wear ski goggles, because the sun reflection on the snow-ground is very strong, and the cold wind has strong stimulation on eyes, so you need to have a pair to protect your eyes. Moreover, they can also protect your eyes from ultraviolet light.