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Thread: Very long vertex distances

  1. #1
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    Very long vertex distances

    Do you do anything different for clients with very long vertex distances? I've had two clients last week with a vertex distance of 20-22mm. They prefer wearing the frame this way so there was no way to make it any shorter (same for any other frame). I ordered regular 14mm corridor Hoya Mystyles, lowered the fitting height 1mm and slightly upped the frame's inclination to about 12°. For POW measurements I entered 10° since I lowered the fitting height 1mm. Both clients are low hyperopes with 2-2.25 adds.

    Should I have done anything differently?
    Last edited by Airegin; 09-09-2020 at 06:08 PM.

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    Master OptiBoarder OptiBoard Silver Supporter lensmanmd's Avatar
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    SV. At this VD, why bother w/PALS?
    I bend light. That is what I do.

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    Master OptiBoarder AngeHamm's Avatar
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    Your patient is completely sabotaging the function of their lenses.
    I'm Andrew Hamm and I approve this message.

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    What's up? drk's Avatar
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    We get this from time to time, and my optician asks how we should compensate.

    My standard response has been: "Do it the regular way because there's no compensation for such position of wear".

    And then I slap the patient if they complain.

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    Compulsive Truthteller OptiBoard Gold Supporter Uncle Fester's Avatar
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    Ryser's Rule is in play.

    *Ryser's Rule- The success of a progressive is directly proportional to the motivation of the patient to wear progressives.

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    Both clients had progressives before with the same VD. Surely increasing inclination and lowering the fitting height a bit should improve optics?

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    Master OptiBoarder AngeHamm's Avatar
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    Quote Originally Posted by Airegin View Post
    Both clients had progressives before with the same VD. Surely increasing inclination and lowering the fitting height a bit should improve optics?
    Dead center of the lens, maybe, a little.
    I'm Andrew Hamm and I approve this message.

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    Quote Originally Posted by AngeHamm View Post
    Dead center of the lens, maybe, a little.
    I always ask my clients to sit in a relaxed position the way they sit in front of the TV. I measure the fitting height in this position then let them stand up and compare. Usually this is about 1mm difference. If it's more then I have to explain they can't lean back too much. The rare client who keeps insisting on leaning way back gets a short corridor a couple mm lower which is far from optimal but it keeps them happy at least (never go short with long VD's obviously).

    If I had told them progressives can't be done they would have just gone elsewhere. Might as well do my very best to get the best possible result.
    Last edited by Airegin; 09-10-2020 at 03:51 PM.

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    Quote Originally Posted by drk View Post
    We get this from time to time, and my optician asks how we should compensate.

    My standard response has been: "Do it the regular way because there's no compensation for such position of wear".

    And then I slap the patient if they complain.

    You would be a fun doctor to work with

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    Compulsive Truthteller OptiBoard Gold Supporter Uncle Fester's Avatar
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    Quote Originally Posted by NIACITPO View Post
    You would be a fun doctor to work with
    Just do not complain about anything!

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    Quote Originally Posted by Uncle Fester View Post
    Ryser's Rule is in play.

    *Ryser's Rule- The success of a progressive is directly proportional to the motivation of the patient to wear progressives.
    I still use this rule almost daily. Whatever happened to Mr. Ryser? Quite enjoyed reading his posts.

    Also I second the SV option. With that BVD you can proportionately increase any minus correction or decrease any plus correction using the dioptre formula and adding whatever their BVD is to it, then reversing the calculation. But would this make much sense if they wear them like that?

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    Master OptiBoarder AngeHamm's Avatar
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    Quote Originally Posted by Beeped View Post
    I still use this rule almost daily. Whatever happened to Mr. Ryser? Quite enjoyed reading his posts.
    Chris passed away last year.
    I'm Andrew Hamm and I approve this message.

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    Chris is missed by us all. Thanks for mentioning him, Andrew.

  14. #14
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    Both clients got their glasses today and they're very happy. One was even amazed how much better it was than the previous pair.

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