For the men who, a cool sunglasses in the sun at the same time, but also for their own considerably. However, the array of sunglasses on the market how to choose? Sunglasses choose improper, not only can not achieve protection eye The role, and even harm our health The
Choose sunglasses have learned
In the summer sun's strong exposure, the first person's pupil contraction, the eyes will not consciously squint, over time will produce visual fatigue, dizziness and other discomfort. Wearing quality sunglasses will give your eyes excellent protection. Sunglasses currently on the market roughly sub-polarized lenses, color lenses and color lenses three. When buying sunglasses, first of all an examination The quality of the lens. You can put the sunglasses in the eye 40cm-45cm, through the lens to observe the object, such as the discovery of linear distortion or swing, indicating that the lens deformation, should not be purchased; can also be facing the lens facing the fluorescent lamp, and gently turn, Do not buy when you are uncomfortable. Second, but also pay attention to the color of the lens. Gray, green, brown the best; dark brown, black second; blue and purple the worst. The color should not be too shallow, because it can not resist the light exposure. A good sunglasses should be marked with "uv-400" words, and indicate the production of brands, specifications, site and so on. Sunglasses only suitable for the sun wear, sunset, cloudy, rainy days, indoor should not wear.
In the case of Poor quality sunglasses
Sunglasses can block the UV, because the lens with a layer of special coating. After the lens coating, blocking, absorbing ultraviolet light at the same time, also blocked part of the useful light, so that the lens light transmission has declined. Good quality sunglasses, blocking the ability of ultraviolet light, but the light down much, do not affect the object's clarity, and the lens coating has a certain hardness, the surface is not easy to wear. The poor quality of sunglasses on the contrary, a serious decline in lens transparency, wearing such sunglasses, eyes like a dark room in the material, then the pupil will become larger, but a lot of residual ultraviolet light into the eye, the eye damage.
Buy sunglasses, we must go to the regular optical shop and brand optical shop to buy. In addition, it should be noted that colored glasses do not necessarily block ultraviolet, only in the lens coated with anti-ultraviolet film, can be used as a sunglasses.
In the case of Four kinds of face how to choose the right sunglasses
Choose a streamlined or rounded frame, and the face of the strong lines and corners of the feeling.
Try the square frame, can be visually lengthened, adjust the ideal face ratio.
In the case of Inverted triangular face:
Highlight the color or emphasize the design of sunglasses mirror legs, can narrow the narrow face of the problem.
In the case of Goose-shaped face:
Brother, just pick a sunglasses, you will be pulling the wind (Reference site: rest assured medical network)