Lenses

Perhaps the most important aspect of effective sports sunwear is the optical quality and visual enhancement of the lenses. Many lens colors that are particularly effective in certain situations (such as brown, green, gray, yellow, orange, etc.) are now available.
Polycarbonate lenses are also extremely popular, as they are super strong and impact-resistant, a benefit that is particularly appealing to many people involved in sports.
Polarized lenses are also in demand, because they reduce glare produced on flat surfaces such as water or a field of snow. There is, however, some debate as to polarized lenses’ effectiveness when it comes to sports that require contrast definition like downhill and mogul skiing.
Glass lenses are used occasionally in sports eyewear (like in sunglasses for golfing) because of their great optical quality, but many people involved in more extreme sports shy away from them because of the potential for shattering upon impact.