PROCLEAR SPHERE (alsoknown as Proclear Compatibles). Proclear Sphere contact lenses utilize a unique technology that helps reduce the buildup of deposits and enables the lenses to retain more moisture, allowing you enjoy a full day of comfortable wearing. Just about any contact lenses will feel good when you first put them in. But what about four, eight or 12 hours later? Many lenses start to feel dry, itchy or make your vision begin to look blurry. But with Proclear lenses, you'll enjoy an unrivaled level of comfort all day long. This exceptional level of comfort is made possible by PC Technology(tm), which creates a unique material containing molecules of phosphorylcholine (PC), a substance found naturally in human cell membranes. These molecules attract and surround themselves with water, keeping Proclear lenses moist and comfortable, even after 12 hours of wear. FEATURES: Exceptional all-day comfort; Outstanding vision quality; Patented PC Technology; Convenient monthly replacement schedule.