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The Functional Vision Analyzer is a unique piece of vision test equipment. Actually it is the only one in the world today. What sets it apart is it complies with FDA guidelines and ANSI standards, international standards, ISO standards for testing contrast sensitivity. It has the fact sine-wave gratings. It has the light levels that are standards and it not only is a viewing box that controls light levels but also controls your viewing distance. At the same time it allows you through EyeView software to take the results of the contrast sensitivity test, which is a curve, and process pictures so it allows the doctor and patient to see what the contrast was, lets say before and after treatment, and helps the doctor understand and the patient understand, even the patient's family sometimes with cataracts why the patient might need surgery for example. So it allows you to take this very sophisticated sine-wave contrast sensitivity data and just show the results in terms of pictures that anyone can understand.