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A PD is the distance between the visual axes of the two eyes.   It can be measured manually with a ruler or automatically using a pupillometer. The pupillometer is more accurate as well as more consistent. USING A PUPILOMETER Place the nose pads on the patient’s nose with the forehead bar in place helping to center the instrument on the nose. Ask the patient to ..
Are you using a millimeter ruler for PD's and fitting heights; does it define your expertise? As an optician or para-optometric, do you feel threatened by the number of digital measuring devices that you have seen or read about? I’ve had this discussion with many opticians and para-optometrics lately and here’s what I’ve heard. Yes, the Internet and new technology are placing new demands ..
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