The more precise the refraction, the better the pair of glasses. Cutting-edge instruments for subjective refraction from ZEISS not only ensure a completely new consultation experience, but also provide ultra precise results, such as with the ZEISS VISUPHOR 500 digital phoropter with the ZEISS VISUSCREEN 100 acuity chart. Thanks to a large number of additional tests (von Graefe, Schober), the system makes it possible to diagnose phoria and to check a patient's monocular or binocular vision, ultimately providing them with the best spectacle lens prescription for their vision needs.