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Thread: Reverse slab off bifocal in high index.

  1. #1
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    Reverse slab off bifocal in high index.

    Looking for a lab that can make a reverse slab off bifocal in 1.67 and not having any luck. Patient has been wearing reverse slab off for a long time and did not do well with regular slab off. Any suggestions?

  2. #2
    One eye sees, the other feels. OptiBoard Gold Supporter
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    Z,

    To the best of my knowledge, Younger makes the only reverse slab, and is available in cr39 ft28 only.

    https://www.youngeroptics.com/defaul...e-939d9278861b

    No reason not to switch to a custom slab, where it will be on the back of the most minus/least plus lens, instead of the front of the least minus/most plus, and in most lens styles and materials.

    Hope this helps,

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

    It is easier to fool a man, than to convince a man he has been fooled. -Mark Twain

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    A reverse slab cannot be made at the lab level, it has to be part of the mold when the lens is cast. The market for this product is small and in high index it is smaller yet. The economics are not there for anyone to produce this product.

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    Master OptiBoarder OptiBoard Silver Supporter lensmanmd's Avatar
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    Why 167?
    Pt has successfully worn CR39 for years.
    Reverse slabs are only available in cr39.
    I bend light. That is what I do.

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    Hi, https://questopticallab.com/our-product/ can do this.. mention me for a direct account.

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    Quote Originally Posted by lensmanmd View Post
    Why 167?
    Pt has successfully worn CR39 for years.
    Reverse slabs are only available in cr39.
    167 because her higher Rx is in the -9's and 174 is even less likely to find. May have to mix materials.

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    You might check out 'Slabs-Plus' in Florida for custom slab-off.

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