TableRe Measure Optical Vernier PD Ruler Pupil Distance Meter Eye Ophthalmic Tool (1 Pack)
- My PD Ruler is a mm ruler for accurate PD measurements. Just Wear, Slide & Record your PD. Each pack has 2 PD Rulers: for an adult and a child..
- PD measurement tool adults kids plastic square flexible level distance glasses folding eye care leveler radius gauge millimeter scanner measuring tester centimeter eyeglasses pupillary visual tools pupil optical tracker pd ruler meter vernier home use.