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: Ensure it includes your Sphere (SPH), Cylinder (CYL), and Axis if you have astigmatism.

: 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 buy glasses online z

You must have an up-to-date prescription from an eye doctor. : Ensure it includes your Sphere (SPH), Cylinder

: Zenni now requires the date of your prescription to ensure it is current. 2. Measure Your Pupillary Distance (PD) Gather Your Prescription

PD is the distance in millimeters between the centers of your pupils, which is vital for centering the lenses correctly.

: Use the Zenni Virtual PD Tool which uses your webcam and a standard magnetic card (like a credit card) for scale.

Buying glasses from is a popular way to get affordable prescription eyewear starting as low as $6.95 . To ensure your order is accurate and fits well, follow this step-by-step guide. 1. Gather Your Prescription