Meet the Topcon EZ-200 Advance, which is the most sophisticated spectacle and lenses measuring system in the industry, and it's completely user friendly. Get an accurate measurement in just three steps: insert glasses, push measure button, and get results. The Topcon EZ-200 Advance uses a Hartmann Shack sensor. Through the Hartmann Shack plate, the entire lens area can be scanned at once. Compared to manual alignment with a conventional lens meter, this improved method is faster and more efficient. Automatic sensing over a wider measuring area reduces the chance of missing measurement points and provides repeatable measurements that are not dependent on the operator’s skill.