A:Whether you’re cycling, running, or skiing, Oakley’s RadarLock Path has a lens for you. The pick of many London Olympians, the $220 RadarLock Path uses an ingenious mechanism to let you switch out the lenses quickly. Open a spring-loaded latch on the left hinge, swing the temple forward, and remove the lens. It has all the high-end extras typical of Oakley shades, such as interchangeable nose pads, the company’s high-definition optics, and an option for prescription lens inserts. Out of the box, it comes with two lenses, bright days and low-light conditions. The similar Pitch model, also $220, features a smaller lens but with better air flow.