ALLERGIES II
ALLERGIES AND PHOTOKERATITIS CHRISTMAS is here again,snow is falling once again,the weather is cold.... As family and friends enjoy the best of summer,others cannot wait for it to pass by.Medically,some people are very reactive to the presence of snow flakes and seasonal changes in the weather patterns. Photokeratitis is a painful eye condition that occurs when your eye is exposed to invisible rays of energy called ultraviolet (UV) rays, either from the sun or from a man-made source. Photokeratitis can be caused by sun reflection from sand, water, ice and snow . It can also happen if you stare at the sun, such as watching a solar eclipse directly without using a special device. A solar eclipse can also cause a burn to the retina, which is long lasting and more serious than temporary corneal damage. There are also many man-made sources of ultraviolet light, including tanning lamps and tanning beds, as well as arc welding. Snow blindness: a common form of photo