I purchased the OPD-Scan III which replaced my OPD-Scan II. The old system gave me great results for six years but the new one is amazing! My office runs more efficiently and I believe it is much more accurate. There have been a number of times that I have put in the “wavefront” prescription and have gotten better results than the patients subjective. The patients like the blue light better – they say it is easier to look at. Thank you, Marco, for the new and improved OPD – I am saving more time and it does make the day more streamlined.