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
: 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
: Some rulers offer measurements for "Single PD" (total distance) and "Dual PD" (distance from the bridge to each individual pupil), which is often more precise for high-index prescriptions. Measuring your PD is the final step in
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
: For a simple, no-frills option, Hummingbird Hues Vision sells individual rulers and rulers with occluders. 4 Pcs Pupillary Distance Rulers
: Some rulers offer measurements for "Single PD" (total distance) and "Dual PD" (distance from the bridge to each individual pupil), which is often more precise for high-index prescriptions.
