Sunglasses by use can generally be divided into sunshade, light-colored sunglasses and special-purpose sunglasses three categories.
The so-called sunshade, as the name suggests is used for shade, people in the sun usually rely on the adjustment of the pupil size to adjust the luminous flux, when the light intensity exceeds the human eye regulation ability, will cause harm to the human eye. So in the outdoor activities, especially in the summer, many people use sunshade to block the sun, in order to reduce the eye caused by fatigue or irritation caused by light damage.
Light-colored sunglasses on the sun's blocking role as a sunset, but its rich colors, suitable for use with all kinds of clothing, there is a strong decorative effect. Light-colored sunglasses because of its rich colors, diverse styles, by the young family of all ages, fashion women are more of their favorite plus. Special use sunglasses has a strong ability to block the sun, commonly used in the beach, skiing, mountain climbing, golf and other strong sunlight, the anti-UV performance and other indicators have higher requirements.
Different groups of people, according to different preferences and different uses to choose sunglasses, but the most fundamental is to protect the wearer's safety and vision from the basic principles of injury. Reduce the light stimulation, depending on the material is not clear deformation, anti-UV, color recognition is not distortion, accurate identification of traffic signals, sunglasses should be the basic function. If the above functions are flawed, the loss of sunglasses, the role will produce dizziness, eye soreness and other consciously do not meet the symptoms, and sometimes produce unresponsive, defensive illusion and walking illities and accidents caused by traffic accidents The So choose sunglasses can not only focus on style and ignore its inherent quality.