Trying to scan glasses with GlassesUSA Prescription Scanner app

GlassesUSA has a prescription scanner app, which allows you to scan your glasses with your phone to determine the prescription values. For some glasses, it will work immediately. For my glasses with cheap plastic lenses, on the other hand... not so much. My coworker and I stacked hard drives and desktop PCs to hold his iPhone in place so we could divert two hands to tilting the glasses, whereas the flattened cardboard box was used for blocking overhead light which was causing lots glare.Feel free to try it out for yourself: https://www.glassesusa.com/scan

http://www.nicovideo.jp/watch/sm34773213