: Use the Zenni Virtual PD Tool which uses your webcam and a standard magnetic card (like a credit card) for scale.
You must have an up-to-date prescription from an eye doctor. buy glasses online z
: Zenni now requires the date of your prescription to ensure it is current. 2. Measure Your Pupillary Distance (PD) : Use the Zenni Virtual PD Tool which
: Ensure it includes your Sphere (SPH), Cylinder (CYL), and Axis if you have astigmatism. buy glasses online z
: 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
PD is the distance in millimeters between the centers of your pupils, which is vital for centering the lenses correctly.