Passport Reader Tutorial - Tips on Lighting, Focus, Glare for the Machine Readable Zone (MRZ). IDVisor Smart Plus mobile ID Scanner uses Optical Character Recognition to read the MRZ which are the 2 lines (Full-size passport) or 3 lines (passport ID Card) of text. Make sure the MRZ is in focus and there is no glare or shadows in the MRZ area. Center the passport in the frame as if enabled in the configuration settings, the full image of the passport will also be captured.