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Thread: Progressive with prism

  1. #1
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    Progressive with prism

    Hello
    Can a progressive lens be ordered with a prism just in the reading Rx and not in the distance Rx
    Thanks

  2. #2
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    If your lab is able to do a slab off they can take a single vision blank create the amount of prism you want. The prism can be oriented in up or down only if you turn it in or out the line would bisect the distance. After creating the slab off prism you would put a free form progressive on the back. A second way would be to take a single vision prism cut it in half and bond it to a free form progressive. You can do the same with a Fresnell prism.

  3. #3
    One eye sees, the other feels. OptiBoard Gold Supporter
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    Quote Originally Posted by Optikaye View Post
    Hello
    Can a progressive lens be ordered with a prism just in the reading Rx and not in the distance Rx
    Thanks
    Welcome to OB.

    As mentioned above, a slab-off prism can sometimes be used to correct prescribed vertical prism at near only, or more commonly, for imbalance at near due to anisometropia. Not possible for prescribed in or out prism on a PAL. Post the Rx and history- all solutions have some degree of undesirable consequences.

    For example, we might be able to resolve diplopia, but maybe not asthenopia, by reducing the corridor length, increasing the general purpose eyewear utility, supplying SVNO for the best possible vision/comfort as needed. Numerous other options are available depending on the Rx, VA, usage, etc.

    Best regards,

    Robert Martellaro
    Roberts Optical Ltd.
    Wauwatosa Wi.
    www.roberts-optical.com
    ~~~~~~~~~~~~~~~~~~
    Science is a way of trying not to fool yourself. - Richard P. Feynman

    Experience is the hardest teacher. She gives the test before the lesson.



  4. #4
    What's up? drk's Avatar
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    If it's horizontal prism, Kodak used to do it, but they sold out to a company called Neurolen$.

  5. #5
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    Quote Originally Posted by drk View Post
    If it's horizontal prism, Kodak used to do it, but they sold out to a company called Neurolen$.
    Yup. Kodak called it the "anti-fatigue lens". Base in near only progressive. I used it for a grand total of 1 patient ever.

  6. #6
    What's up? drk's Avatar
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    But did it work???? :)

  7. #7
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    It did actually. It was for the OD that worked for me.

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