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: This is the distance between your pupils in millimeters and is crucial for aligning the lenses with your vision. If it isn't on your prescription, you can measure it by holding a ruler against a mirror. 2. Determine Your Frame Fit Face Shape Guide - Glasses and Sunglasses

Before browsing, ensure you have a current prescription (typically updated every 1–2 years). buy fashion glasses online

: On your prescription, OD refers to the right eye and OS to the left. A plus (+) sign indicates farsightedness, while a minus (-) sign indicates nearsightedness. : This is the distance between your pupils