The Cataract Eye Model is made of hard, durable plastic and measures 3.75 inches in diameter, mounted on a slightly larger plastic base. Included are five interchangeable lenses that show various types of conditions including sub-capsular, capsular, mature, cortical, and nuclear. One normal lens is also included. These lenses are 1.75 inches in diameter. The model is realistically illustrated, and is designed primarily for patient education in cataract surgery.