Sunglasses must be worn during daylight hours regardless of whether the sun is shining brightly or not. A bright, cloudy day is deceptive and can be as dangerous to the eyes and skin as a day of brilliant sunshine. The glasses will also protect against blowing snow. The risk of snow blindness and sunburn is increased at high altitudes because the clear air allows more of the burning rays of sunlight to penetrate the atmosphere. Increased caloric intake, especially in the form of carbohydrates, is important for the production of internal body heat.
Proper diet includes hydration.
Adequate water intake is as important in cold environments as in hot. Personnel, bundled up in layers of protective clothing, may not be aware of the amount of sweat they are losing. Water discipline must be enforced in cold environments. The Buddy System. Personnel must be trained to recognize signs of cold injuries on other individuals.