: This is the measurement (in millimeters) between your pupils. It ensures the optical center of the lenses aligns perfectly with your eyes.
: Check the inside of your current well-fitting glasses for three numbers (e.g., 52-18-140), which represent lens width, bridge width, and temple length. How to Buy Prescription Sunglasses Online can i buy prescription sunglasses online
: Your prescription must be current, typically issued within the last one to two years . : This is the measurement (in millimeters) between