PureVision Toric Contact Lenses for Astigmatism are uniquely designed to meet the special vision correction needs of people with astigmatism. Manufactured by Bausch + Lomb. AerGel makes PureVision Toric For Astigmatism lenses exceptionally healthy. They allow natural levels of oxygen to reach your eyes, and resist protein buildup. Engineered to remain clean and comfortable all day long. Monthly replacement schedule.