: You can also use a millimeter ruler and a mirror. The average adult PD is between 54–74 mm. 3. Choose the Right Frame Size How to Order Glasses Online
: Ensure it includes your Sphere (SPH), Cylinder (CYL), and Axis if you have astigmatism. buy glasses online z
: Zenni now requires the date of your prescription to ensure it is current. 2. Measure Your Pupillary Distance (PD) : You can also use a millimeter ruler and a mirror