Boston Equalens contacts are high Dk rigid gas permeable contact lenses from Bausch & Lomb. These Boston Equalens contacts are custom made to precision prescriptions so they fit comfortably on your eyes. The oxygen permeable qualities of the contact lens allow your eyes to breathe for longer wear and more comfort. These lenses are designed for daily wear or extended wear.All RGP lenses are a final sale. No refunds or exchanges.