In preference to the conventional but more difficult grind/polish method, Isuzu Glass uses a manufacturing process by which softened glass is pressed into a die. The advantages of the pressing method, compared to other mechanical processes, include the ability to make many lenses without losing quality, greater design flexibility, and lower cost. Isuzu Glass can also produce aspehric lenses with larger diameters. We use customer specifications (drawings and mathematical curvature formulas) to create molds and then manufacture lenses.