5Pcs/set Optical Pupil Distance Ruler Ophthalmic PD Meter Eye Instrument RuDOSHH

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Feature:<br>The pd ruler can help you when you want to buy glasses online<br>Put the notch over your nose, as close to your eyes as you can, then find the middle if your pupils in a mirror,<br>read the line closest to the middle of the pupils.<br>Come With 4 different types rulers which suits different need,<br>and 3 types are soft rulers , and 1 type are hard rulers.<br>Long Handle Eye Occluder Optometry<br>Note<br>that this does not come with any instructions,<br>so if you don't know how to take a PD measurement, you will need to look that up on the internet.<br>Description:<br>Material: Plastic,<br>Length (mm):21.5cm/8.46"<br>Width(mm):5.5cm/2.16"<br>Quantity: 5PCS.<br>Note:<br>Size for manual measurement, there may be a 0 to 2 cm error, belongs to the normal phenomenon.<br>And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!<br>Package includes:<br>5pcs/setX Eye Occluder PD Rulers<br>