Sunglasses can be divided into sunshade mirrors, light-colored sunglasses and special-purpose sunglasses.
The so-called sun visor, as the name suggests is used for sunshade, people in the sun usually rely on adjusting the size of the pupil to adjust the luminous flux, when the light intensity exceeds the ability of the human eye to adjust, it will cause damage to the human eye. Therefore, in outdoor activities, especially in the summer, many people use sunshades 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 as sunshade mirrors, but they are rich in color and are suitable for use with all kinds of clothing. They have a strong decorative effect. Light-colored sunglasses are favored by young people because of their rich colors and diverse styles. Fashion women are more fond of them. Special-purpose sunglasses have a strong function of blocking sunlight. They are commonly used in beaches, skiing, mountain climbing, golf and other fields with strong sunlight. Their UV resistance and other indicators have higher requirements.
Different people choose sunglasses according to different preferences and different uses, but the most fundamental thing is to start from the basic principle of ensuring the wearer's safety and vision without damage. Reducing glare stimulation, clear and non-deformation of vision, anti-UV, no distortion of color recognition, and accurate identification of traffic signals should be the basic functions of sunglasses. If the above functions are flawed, the effect of sunglasses will be lost, and the symptoms will be dizzy, sore eyes and other symptoms that are not suitable for the symptoms. Sometimes, there will be unresponsiveness, illusion of color and unequal symptoms of walking and traffic accidents. . So choosing sunglasses can't just focus on styles and ignore their inner quality.