"Boston Envision contact lenses are oxygen permeable rigid lenses that allow air to flow to your eyes so they can breathe. Boston Envision contact lenses are custom made with a unique bi-aspheric back to fit the specific requirements of your contact lens prescription. These lenses are daily wear lenses designed for people with myopia, hyperopia, and astigmatism.
All RGP lenses are a final sale. No refunds or exchanges. "