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Understand how to measure PD yourself in quick easy steps:
Pupillary Distance alias PD is the distance from the centre of the pupil of one eye to the other. PD is necessary for getting eyeglasses, to correct your vision. The measurement plays a vital part in determining correct positioning of your lenses within the frame. Especially, when you are looking for bifocal or multifocal lenses, PD is mandatory.
You simply require:
That's it, your PD is ready.
Things to note:
Single PD, scientifically known as monocular PD, is the measurement from the centre of each pupil to the nose bridge.
Dual PD, scientifically known as binocular PD, is the total distance measurement between your pupils.
Monocular PD is mostly recommended for more accurate PD. Since both our eyes are generally asymmetrical. Not both the eyes will be at an equal distance from the nose of the bridge. For eg: If the total binocular distance is 58 mm, it is not necessary that it will be equidistant on both sides. From one eye to the nose bridge it might be 31 mm while other it might be 27 mm. This can get the PD wrong. Monocular PD helps to get accurate measurement, especially for crafting progressive lenses.
With your PD and prescription, you can order perfect pair of glasses at Framesbuy and enjoy enhanced vision.