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Amazon.com: Ultrassist Pupillometers for Measuring Pupillary Distance (PD), Transparent PD Ruler, Essential Tool for Single PD or Dual PD Measurement : Tools & Home Improvement
Health Eye Optician - WHAT IF MY PD IS OFF BY 2mm? Even a 2mm difference in pupillary distance can cause a pair of eyeglasses to feel off because your pupils tend
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Sports Vision's Multipurpose PD Optical Ruler for Reading Pupil Distance Meter Eye Ophthalmic, Rosa, S : Amazon.co.uk: Health & Personal Care
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PD Ruler, Pupillometers for Measuring Pupillary Distance, Essential Tool for Single PD or Dual PD On-line Order Eyewear : Amazon.co.uk: DIY & Tools
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