● Pupil distance and pupil height combined product.Easy to be operated.
● When measuring PD,adjust the top knobs in the left and right.
● When measuring PH,please wear glasses,adjust the middle knobs in the left and right,from boresight of eyes which get through lenses to the lowest bottom of glasses is ok.
● It's also an essential tool for optometry of progressive glasses.
1pc packing size:23*10*5cm,net weight:0.37kg
30pcs packing size:49*41*26cm,gross weight:10.5kg
55pcs packing size:50*47*38cm,gross weight:18.5kg