You can find PD rulers for as little as $1 to $18, depending on the material and included guides. PD Ruler with Instruction Manual
: Available on eBay, this version features a nose bridge design and includes eye care tips for children.
: Since most of us aren't trained ocular technicians, having a visual guide is invaluable. Where to Buy
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.
When buying a ruler, look for features that minimize human error:
Ruler Buy | Pupillary Distance
You can find PD rulers for as little as $1 to $18, depending on the material and included guides. PD Ruler with Instruction Manual
: Available on eBay, this version features a nose bridge design and includes eye care tips for children. pupillary distance ruler buy
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. pupillary distance ruler buy
When buying a ruler, look for features that minimize human error: