Love to swim, but you're eyesight is not what it used to be and you can't see your watch or the lap counter when working out in the pool. Aqua Sphere, The Eagle optics is interchangeable and gives you the confidence of clear, enhanced vision while swimming. Durable Polycarbonate construction means long life, 100% UV protection, and an anti-fog and scratch resistance will make seeing clear and safe. Easy to install simple pop and swap lens design will get you seeing fast.