Aqua Sphere Eagle Goggle PRESCRIPTION GOGGLES. Created with variable prescription lenses and a comfortable silicone skirt, the Blue Eagle Swim Goggles are designed with an Optics lens system (sold separately) available in half-step diopter increments from -1.5 to -6.0. CURVED LENS TECHNOLOGY. Our patented curved lens technology offers the clearest possible visibility and 180 wide field of vision with exceptional hydrodynamics.. UV & ANTI-FOG. The original swim mask for adults, The Eagle is constructed with 100% UVA/UVB protection. Pairing that with a scratch-resistant anti-fog lens, youll be enjoying the water year round! CLEAR LENS TECHNOLOGY. The Clear Lens transmits a natural light, which makes it ideal for low light and overcast conditions where maximum visibility is required. Great for indoor pools and dark conditions. WE LIVE TO SWIM. Whether youre a new swimmer or a seasoned professional, Aqua Sphere products cater to any and every experience level. They are always evolving to provide the most functional and unprecedented gear in your adventures.