The Ultra Comfort Prescription Swimming Goggles provide corrective powers for swimmers with near or far-sightedness so contact lenses aren't needed while swimming (which isn't healthy for your eyes). Sleek black/blue prescription swimming goggles. The lenses are treated with a high performance anti-fog treatment. The straps are made of high-quality rubber for ultimate comfort. Lenses are available for Myopia (short-sightedness) in powers from -1.5 to -8.0.