about a 6 months supply Did you ever think that you couldn't wear contacts if you have astigmatism? Well think again. PureVision Toric Contact Lenses for Astigmatism are uniquely designed to meet the special vision correction needs of people with astigmatism. PureVision Toric Contact Lenses for Astigmatism lenses deliver clear, stable vision - blink after blink. AerGel™ makes PureVision Toric lenses exceptionally healthy. They allow natural levels of oxygen to reach your eyes, and resist protein buildup - so your eyes stay comfortable all day long and well into the night.