Every outdoor activity has its own visual requirements, and this has led to the development of sports-specific performance sunglasses. Many frame and lens combinations have been specifically designed for golfing, cycling, rock climbing and other specific activities.
For example, a certain lens tint may help golfers notice subtle changes in the direction of the blades of grass on a green that could affect the line of a putt. But a completely different tint may be best to help a hunter see the contrast of a bird against an overcast sky.
Multi-purpose sunglasses that feature interchangeable lenses with different tints for different activities and lighting conditions also are available.
When choosing frames, look for lightweight, unbreakable models that feature rubber pads on the bridge and the ends of the temples to keep the sunglasses securely in place even when you are perspiring and moving quickly.