Pupillary Distance Ruler Buy ✮ 【QUICK】

For decades, pupillary distance (PD)—the measurement between the centers of your pupils—was a "secret" metric kept by opticians to ensure you’d return to their storefront for prescription lenses. As online retailers like Zenni Optical and Warby Parker disrupted the market, the PD ruler became the consumer's key to independence.

: A curved notch that rests on your nose helps stabilize the ruler for more accurate readings. pupillary distance ruler buy

: Available on eBay, this version features a nose bridge design and includes eye care tips for children. : Available on eBay, this version features a

Measuring your PD is the final step in translating a paper prescription into a functional pair of glasses. If the measurement is off, the "optical center" of the lenses won't align with your eyes, leading to headaches, blurred vision, or eye strain. What to Look for in a PD Ruler What to Look for in a PD Ruler