RADIATION IN THE MOUNTAINS
Radiation in the mountains is extreme, especially in winter. Snow reflects 85% of UVs and their intensity increases by 10% every three thousand feet (1000 meters).
Dangers:•Snowblindness, a feeling of having grit in the eye, tears, redness and the loss of several tenths of vision.
•The white out syndrome, frostbite of the eyelids, watering eyes, loss of contour perception and fear of the light.
In the mountains, it is best to wear wrap-around sunglasses with high protection lenses.
RADIATION AT SEA
Sand reflects 10% of the rays and water approximately 20%.
The higher the hygrometry the greater the radiation hazard.
SUN AND CHILDREN
Children's' eyes, and particularly the eyes of very young children, are more fragile than adults'. UV transmission is total in babies and very high in children under 13.
ATTENTION
Sunglasses sold by non-specialists fitted with no protection index are dangerous for children. Tinted lenes cause the pupil to dilate and this admits even more of the harmful rays.