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Thread: Progressive Question

  1. #1
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    Progressive Question

    On a standard progressive, is the reading area decentered 2mm O.U. or 2.5mm O.U.?

    Many thanks,

    Golfnorth

  2. #2
    One eye sees, the other feels. OptiBoard Gold Supporter
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    Quote Originally Posted by Golfnorth View Post
    On a standard progressive, is the reading area decentered 2mm O.U. or 2.5mm O.U.?

    Many thanks,

    Golfnorth
    2mm, for adds less than +2.75. The premium semifinished have variable insets depending on distance power. The early Varilux used 2.5mm due to an assumed 14" work distance.

    Hope this helps,

    Robert Martellaro
    Roberts Optical Ltd.
    Wauwatosa Wi.
    www.roberts-optical.com
    ~~~~~~~~~~~~~~~~~~
    An expert is a man who has made all the mistakes which can be made, in a narrow field. -Niels Bohr

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