The Use of Sunglasses for Mountaineering
For mountaineers, sunglasses are an indispensable tool to protect their eyes.Most mountaineers climb mountains of more than four or five kilometers, and the sunlight contains a lot of infrared and ultraviolet rays that are invisible to human eyes.The stronger the sunlight, the greater the amount of infrared and ultraviolet light, and the reflection of snow and ice can also burn the eyes.If there is no shelter, direct exposure to the retina of the eye, it will burn the visual cells of the retina, light cause vision loss, serious will be completely blind, called snow blindness in medicine.
Mountaineers wear sunglasses in which the glass contains the chemicals iron oxide and cobalt oxide which absorb infrared and ultraviolet rays.These two compounds are added to the raw glass to make a specialty glass for mountaineering sunglasses.
Polarized lenses
Polaroid lenses filter out incoming light in certain directions, thus reducing the amount of light entering the eye. When you buy them, the store usually provides a picture, and only the image can be seen with the lens on.
Photochromic lenses (lenses)
Color changing lenses can automatically adjust the intensity of the light. When the light is strong, the color of the lens will become darker, and when the light is weak, the color of the lens will become lighter.
Polaroid lenses and chameleon lenses represent advanced sunglasses technology, and good sunglasses have traces of both.
Other features
Mountaineering is always faced with harsh weather, so there is a special requirement for sunglasses.Apart from the high level of protection required by the lenses of sunglasses, there are other aspects of sunglasses that are also important.
Anti-fog, no one wants to walk a few steps on their sunglasses covered with fog, high quality lenses have this function, wipe also need to be extra careful
Useful frames and well-designed sunglasses are sure to hook your ears without causing you discomfort, because it's easy to lose them when climbing hard
Good fit, good sunglasses will be designed to baffle, as close as possible to the face of the climber, blocking the sun from all directions.
