Auto refractometer 1.5.7"LCD color display. 2.Pupil distance auto measured available. 3.New compact design Auto refractometer 1,Adopt ARM process and latest image proc-ess technique,which makes the measurement be more quickly.2,Proven optical system and auto fog chart,which makes the measurement be more accuracy.3,As small as 2.0mm pupil diameter can be measured.4,5.7"LCD color display.5,Pupil ...