Description:
 Optical PD Ruler Pupil Distance Meter Eye Ophthalmic Instrument Tool Features:  It as a cursor pd ruler、 glasses pd ruler、 medical pd ruler、 optical pd ruler、 the store had dedicated.
It is a good promotional item and perfect for hospital、 pharmaceutical or medical supplies.
The cursor pd more easy on the eyes the pupil center、 more accurate measurements.
After alignment can move the cursor、 pd data at a glance.
Enjoy your shopping time and have a good day. Specification: Material: Plastic
Color: White
Size: (L)X(W)X(H):21X5X0.8cm/8.27''X1.97''X0.31'' (appr.) Package includes:  1 Pcs Optical Ruler
 Details pictures: