Despite natural defenses like eyelids, eyelashes, and tears, cold weather can make your eyes dry, cold or both.
In freezing winds, a long winter hike can cause a corneal freeze, leading to blurry vision or temporary vision loss.
Cold weather can lead to excessive tearing. Protect your eyes with sunglasses outdoors. If tearing persists indoors, it could be allergies, not just cold irritation.
Excessive UV exposure from snow reflection causes snow blindness, which can be painful. Prevent it with snow glasses