Sunglasses to press utility can generally be divided into the mirror, fake ray ban sunglasses light color sunglasses and special purpose sunglasses three categories.

The so-called sunshade lens, just as its name implies is to make the use of shading, people in the sunshine will depend on the size of the pupil often adjust to adjust the flux, when light intensity than the human eye adjust ability, will cause damage to the human eye. So in the outdoor activity places, especially in the summer, many people are using the mirror to keep out sunshine, in order to reduce eyes adjust the fatigue of the cause of the damage the stimulation or light.

Light color to the sun block sunglasses role than the mirror, but its rich colors, suitable for all kinds of dress collocation with use, fake ray ban sunglasses have very strong adornment effect. Light color sunglasses because its rich colors, style diversity, by the young gens of favor, fashionable women to their favor is life. Special use sunglasses has the very strong keep out the sun function, often used for the beach, skiing, climb, golf is the strong sunlight field, its ultraviolet performance indicators are high request.

Different people, according to the different preferences and different use to select the sunglasses, but the most fundamental is to want from the wearer can guarantee the safety and eyesight not damage on the basic principle. Reduce the glare stimulation, inspect content clearly not deformation, prevent ultraviolet, to the color recognition not distortion, accurate identification traffic signals, should be the basic function of sunglasses. If the function with a defect, light lost the role of sunglasses, replica ray ban sunglasses heavy then can produce the dizzy, eyes acid bilges, etc to consciously symptoms, and sometimes also can produce slow to respond to contend, inspect content and walking on color illusion inequality symptoms and cause accidents, etc. So choose sunglasses can't focus on design and ignore its inner quality.