Whether sunglasses can protect against UV rays has nothing to do with the shade of the lens, but is determined by the UV standard of the lens. Too dark lens color will affect visibility, and the eyes are easily damaged by struggling to see. In addition, dark environments can dilate the pupil, which can cause more UV rays to enter the eye if the lens is of poor quality.
Sunglasses can be generally divided into three categories: sunshade mirrors, light-colored sunglasses and special-purpose sunglasses.
Sunshade mirrors, as the name suggests, are used for shading. People usually adjust the luminous flux by adjusting the pupil size in the sun. When the light intensity exceeds the adjustment ability of the human eye, it will cause damage to the human eye. Therefore, in outdoor activities, especially in summer, many people use sun visors to block the sun to reduce the fatigue caused by eye adjustment or the damage caused by strong light stimulation.
Light-colored sunglasses are not as good at blocking sunlight as sunshades, but they are rich in color and suitable for use with all kinds of clothing, and have a strong decorative effect. Light-colored sunglasses are favored by young people because of their rich colors and diverse styles, and fashionable women are even more fond of them.
Special-purpose sunglasses have a strong function of blocking sunlight, and are often used in the fields with strong sunlight such as beaches, skiing, mountain climbing, golf, etc., and their anti-ultraviolet performance and other indicators have high requirements.
Post time: Jun-17-2022