uniform is a good all-round performance

In order to protect themselves from ultraviolet (UV) associated with cataract and other eye problems of optical radiation, what should you do? Wearing sunglasses that comes to mind, but they really protect your eyes from the sun?
In order to compare the sunglasses to block ultraviolet rays, consumer reports tested more than 48 brands, using the spectrophotometer. The instrument measures the sunglasses to block ultraviolet and visible light weight. The use of standards by the American National Standards Institute (ANSI) issued.
"ANSI standards applicable to three non-prescription Sunglasses: cosmetics, general purpose, special use sunglasses, these standards include limiting the transmission of UVB and UVA (the two UV damage eyes), common mode, cosmetic model allows the sun lens transmission up to 30% UVB eye-catching but, must stop at least 95% of the UVA, and the special purpose UVB and standard models - Sunglasses for climbing, skiing and other - is the most stringent, the model must accord with the standard UVB filter out at least 99%, said:" consumer reports.
How to implement ANSI Standard Test of the brand? "Consumer report" found, the vast majority of sunglasses very good performance in the market today. In the past, many have failed to block ultraviolet rays, causing extensive expansion of students, so that harmful radiation more into the eyes. Fortunately, the improvement in design has eliminated the problem.
"In the choice of lens, you don't go high-tech, comfort and versatility. Polarized lenses, thereby reducing the reflected glare, especially can be used to drive a neutral shadow lens, uniform is a good all-round performance. A gray tone, or with dark lenses shallow brown or green color, the general will filter out a lot of small blue color perceptual distortion. A lot of high quality and inexpensive sunglasses, you can find all these qualities "consumer report" said.