The Alta Evolution is equipped with Gravitech®, a revolutionary new optical tracing system. With the help of a camera, this unique tracer can accurately trace a demo lens and project it in 3D in under 4 seconds. Ideal for finishing labs in cramped quarters: the compact design of the unit was designed to save space without sacrificing quality. An intuitive touch screen interface makes operation of the unit simple and efficient. The unit adheres to OMA/VCA communication protocols which allows the Alta Evolution to interact with a wide array of edging equipment. alta evolution left Features include: Parallax-free decentration and blocking High definition camera (1.3 Megapixels) assisted blocking lays out Single Vision, Bifocals, and Progressives Automatic drill point recognition Easy drill hole modificaiton and placement Ability to add blind holes Lens shape capture without a demo lens Digital Lens Clock: measures the front base-curve of the lens in a matter of seconds. Positioning accuracy within .05mm Shape modification with both vertical and horizontal boxing modification 10.5" Color Touchscreen LCD User-friendly touch based interface Automatic calibration Compliant with the VCA/OMA Communication Standard