Proclear Spheres are monthly disposable contact lenses manufactured by CooperVision. Proclear lenses let you enjoy an unrivaled level of comfort all day long. It's an exceptional level of comfort made possible by PC Technology, 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 Compatibles lenses moist and comfortable, even after 12 hours of wear. Proclear Compatibles lenses are tinted for ease of handling and will not change the color of your eye. The tint is simply designed to facilitate locating the contact lenses in solution.