I have found the OPD to be a most valuable asset in my practice. All I ever wanted in practice is an unfair advantage. That is what I feel I get with the OPD coupled with digital refractors. My well vision patients don’t have to answer “which is better, one or two” very much. In fact I have found the Wavefront refraction is so accurate I only need to flip cylinders a couple of times a day. I simply make small spherical adjustments and I am done. Digital refraction takes less than 30 seconds in most cases. My patients love the freedom from the stress of manual refraction and I love the unfair advantage OPD Scan and digital refraction gives me in the marketplace!