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What does DPD and NPD mean?

Question

What does DPD and NPD mean?

Answer Written answer:
Qualified optometrist Simon Kay BSc(Hons) MCOptom answers this question.

Distance Pupillary Distance and Near Pupillary Distance.  This is the distance between the centre of your pupils at distance and at near. Your distance spectacle lenses should be glazed with the optical centres the same distance between them as your DPD, and your near vision spectacles at the NPD.

Optician's Biography

Simon Kay BSc(Hons) MCOptom has been a qualified Optometrist for over 30 years, and has a vast experience of almost all aspects of optometry. He joined Specsavers Opticians in 1993 first in Liverpool and for 15 years as a director of Lancaster and Morecambe. He served on many panels and committees whilst a director, including those responsible for IT design and professional advancement. He was regional chairman of the North West directors of Specsavers for over 12 years and as such was involved in almost all aspects of optometry on a business and professional level. He has been involved on the Local Optical Committee for many years and is currently Vice Chairman in his area.
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