: 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 .
: Ensure your prescription is current (typically issued within 1–2 years). It should include Sphere (SPH) , Cylinder (CYL) , and Axis values. buying glasses online usa
: Check the inside of your current, well-fitting frames for three numbers (e.g., 52-18-140) representing Lens Width , Bridge Width , and Temple Length . How to Measure Your PD : This measures the distance (in millimeters) between
Before shopping, gather these specific details to avoid order errors: well-fitting frames for three numbers (e.g.