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How to Measure Your PD?
1
Download PD ruler
Download PD ruler
Down load our PD ruler Or find a ruler with a millimeter scale.2
![](https://img.buyglasses.com/images/pd2.png)
Mirror or Friend
Stand 8 inches (20 cm) away from a mirror or a friend. Place & hold the PD ruler against your brow. Keep your face straight.3
![](https://img.buyglasses.com/images/pd3.png)
Align to Zero
First, close your right eye and align the ruler’s zero to the center of your left pupil.4
![](https://img.buyglasses.com/images/pd4.png)
Open Right, Close Left
Next, open your right eye and close your left eye.5
![](https://img.buyglasses.com/images/pd5.png)