Pupillary Distance Ruler Buy -

You can find PD rulers for as little as $1 to $18, depending on the material and included guides. PD Ruler with Instruction Manual

: For a simple, no-frills option, Hummingbird Hues Vision sells individual rulers and rulers with occluders. 4 Pcs Pupillary Distance Rulers pupillary distance ruler buy

: Available on eBay, this version features a nose bridge design and includes eye care tips for children. You can find PD rulers for as little

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 Measuring your PD is the final step in

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

When buying a ruler, look for features that minimize human error: