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10-12-2010, 10:13 PM
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Pupilliary Distance??
Whats the use of PD? why every time we place an order online they will ask for PD?
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10-12-2010, 10:14 PM
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to ensure that the optical centres
Pupillliary Distance
One further piece of information is needed to ensure optimum vision correction This is the Pupilliary Distance or PD... the distance between the centres of your pupils, measured in millimeters. The simple procedure for making this measurement can be found on our Supplying your Prescription Details page. This enables us to ensure that the optical centres of the lenses line-up with the centres of your pupils, ensuring maximum visual comfort.
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