Features Automatic dual 3-D tracing Variable fulcrum stylus Integrated debris protection One-touch demo lens holder Built-in Accessory Storage Space Detailed Information Automatic dual 3-D tracing Automatic dual 3-D tracing The unique 3-D mechanism digitizes a binocular measure of 1,000 points of reference per eye. The highly accurate digitized data assures a precise first time fit, regardless of the level of frame curvature. Variable fulcrum stylus Shape editor The unit’s unique design makes use of a variable fulcrum stylus which keeps the axis angle perpendicular to the frame at any height. The stylus automatically adjusts the angle approach of the stylus-to-frame.