The gray lenses

Gray is the color that provides excellent color rendition in all situations of natural sunlight.
This is usually the color that is recommended by many specialists in optics and solar gray sunglasses are widely used models of glasses of high-class filtration as ski goggles and glasses mountain.

The glasses brown

he brown color provides a very noticeable increase in contrast, which improves the quality of vision. The sunglasses in brown or amber base provide excellent sun protection in most circumstances. Brown lentils provide a darkening, which may cause slight discomfort during the confrontation visual eye to frequent changes in light type, such as the frequent passage of sunlight to shaded areas, because the eye will constantly have to adapt to these changes in brightness.
The brown sunglass lenses are very versatile in most activities and exposure.