Binocular pupilary distance: 44-83mm / 1.73-3.27in
Binocular pupillary distance: 45-82mm / 1.77-3.22 in
Distance of target: 30cm/11.8in
The PM 150 Meter is a digital precision optical instrument used to measure distance between human pupils in the process of optometry for fitting spectacles. This device is designed in a scientific and reasonable way, intergrating technologies on optics, mechanism, electricity and microcomputer into while.
Using optical methods to realize hairsprings orientation which replaces the mechanical orientation.