![]() The distance between the two eyepieces of the binocular microscope must correspond to your interpupillary distance. The interpupillary distance is the distance between the centers of your two pupils. ![]() What is interpupillary distance binoculars? This measurement is used to properly align the centre of your eyeglass lenses with the centre of your eyes. Interpupillary distance (PD) is a measurement of the distance between the centres of your two eyes and is dependent on whether you are buying eyewear for distance or close up. What is the use of interpupillary distance? With regard to extremes, the vast majority of adults have an IPD ranging from 50 to 75 mm. 2,3 Mean and median IPD values for adult humans are around 63 mm. IPD is known to be dependent on factors such as age, sex and race/ethnicity. ![]() ![]() What is the normal interpupillary distance? Look straight forward at a distant object and ask your friend to align the “0” mark with the center of one pupil and then read the measurement under the center of your other pupil. Ask a friend with a steady hand to hold a ruler directly under your eyes. ![]()
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