Understanding Pupillary Distance: A Key Element in Eyewear Prescriptions

What is Pupillary Distance?

Pupillary Distance, or PD, is the distance between the centers of your pupils, measured in millimeters. It helps determine the correct placement of lenses within your frames, ensuring you look through the optical center for the best vision correction.

Why PD is Important

• Proper lens alignment prevents eye strain and headaches.
• Ensures accurate vision correction, especially for high prescriptions.
• Helps frames and lenses fit comfortably on your face.
• Crucial for progressive or multifocal lenses to function correctly.

How PD is Measured

PD can be measured by an optician using specialized tools, or sometimes by yourself with a ruler and mirror. Measurements can be single (for distance vision) or dual (for distance and near vision). Accuracy is key to achieving clear, comfortable vision.

Tips for Using Your PD Measurement

• Provide your PD measurement when ordering glasses online or in-store.
• Confirm PD with an optician if unsure, especially for high prescriptions.
• Ensure lenses are centered correctly for progressive or bifocal lenses.
• Re-measure PD if your frame size changes or if your prescription is updated.

Get Your Perfect Fit at 3 Pairs Optical

Accurate PD measurements combined with professional frame fitting result in the most comfortable and effective eyewear. Our team ensures your glasses fit perfectly and provide clear, strain-free vision.