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

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 buy glasses online z

: Ensure it includes your Sphere (SPH), Cylinder (CYL), and Axis if you have astigmatism. PD is the distance in millimeters between the