SUNWIN Straight Edge PD Ruler Pupillary Distance Ruler (PD Ruler)

SUNWIN Straight Edge PD Ruler Pupillary Distance Ruler (PD Ruler)

• The pd ruler can help you when you want to buy glasses online
• Put the notch over your nose, as close to your eyes as you can, then find the middle if your pupils in a mirror, read the line closest to the middle of the pupils.
• Length (mm):150
• Note that this does not come with any instructions, so if you don't know how to take a PD measurement, you will need to look that up on the internet.

What is in box ?<br>1 pcs x PD ruler