The opticians’ forum, optiboard.com is a very effective place to communicate regarding common matters Opticians don’t want give you PD data.. Measurement of papillary distance (PD) is a very common thing that a patient asks to a doc. Many want to know what is PD? If there is Opticians keep you away from ZenniOpt. For you for opticians, one can check out Zenni: the #1 online eyeglasses store.

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