: This measures the distance (in millimeters) between your pupils. While it is often omitted from prescriptions, you can measure it at home or use apps from retailers like GlassesUSA.com or LensCrafters .
Before shopping, gather these specific details to avoid order errors:
Buying prescription glasses online in the USA can significantly reduce costs, with basic complete pairs starting around $7 to $38. To ensure a correct fit and clear vision, you must have a current prescription and an accurate measurement. 1. Essential Requirements