Tag 'pupillary distance'
Understanding your face shape is the key to choosing the right glasses. This complete guide explains different face shapes and helps you find frames that enhance your look. Use Nations Optics Face Size and PD Measurement Tool to get accurate measurements and shop eyewear with confidence.
When ordering progressive lenses online, one measurement stands above all others — Pupillary Distance (PD). Get it wrong, and even a perfectly crafted progressive lens will leave you with blurry vision, headaches, and eye strain. This guide explains what PD is, why it is non-negotiable for multifocal lenses, and how to measure it accurately before placing your order.