The Use of Sunglasses for Mountaineering
Author: Shako03,26,2021Views: 1520
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.
