sunglasses purposes generally can be divided into sun mirror, light-colored sunglasses, and special-purpose sunglasses three categories.
The so-called sun mirror, suggests that it is for shade purposes, people usually rely on regulation in the sun pupil size to adjust the flux, the ability to regulate the light intensity more than the human eye, will cause harm to the human eye. In outdoor activities, especially in the summer, many people use sun mirror to block the sunlight, in order to reduce eyes adjust the damage caused by fatigue or light stimulation.
Light-colored sunglasses as good as the blocking effect of the sun visor mirror, but its rich colors, suitable to be used with all types of clothing has a strong decorative effect. Light-colored sunglasses because of its rich colors, diverse styles, by the young people of all ages, female fashion is fallen in love with. Has a strong special-purpose sunglasses block the sunlight function, commonly used on the beach, skiing, climbing, Golf sunlight is more intense wild, UV performance indicators have higher requirements.
Different groups of people, according to different preferences and different uses to select the sunglasses, but the most fundamental from which you want to protect the safety and vision of the wearer not to damage the basic principle. Reducing light stimulation, visual clarity without distortion, anti-UV, no distortion of color recognition, accurate identification of the traffic signal should be a basic function of sunglasses. The function defects, ranging from loss of sunglasses role of weight will produce dizziness, eye soreness consciously adapted to the symptoms, sometimes unresponsive, debate color illusion inequality symptoms and walking depending on the material and lead to accidents . Choose sunglasses can not just focus on style to the neglect of its intrinsic quality.