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Thread: myotor lenticular bifocal

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    myotor lenticular bifocal

    hi there im new to this site and just finding my way around so please be patient, is anyone familiar with the advantages and disadvantages of the myotor bifocal and are they available to order

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    Master OptiBoarder OptiBoard Gold Supporter
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    Here's a job for Mike! The myotor bifocal is a plano margin lenticular myodisc bifocal(description for the younguns)........The field for distance, and near is dictated by the power of the distance and the near power, made by overlapping fields, thus creating an arc shaped junction.

    Advantages:Custom field, and edge thickness control, base curve choice.
    Disadvantages:Difficult to/custom fabrication.

    Now heeeere's MIKE AUUUURRRIIIILIOUS!

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    ATO Member OptiBoard Bronze Supporter HarryChiling's Avatar
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    A very complicated lens to create and forget about astigmatism it will throw off the segment area. It was fun to make one I took pictures here you go.
    Click image for larger version. 

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    thanks... much appreciated

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    Bad address email on file fvc2020's Avatar
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    Hey is that a round seg in it?

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    Master OptiBoarder OptiBoard Gold Supporter
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    Was that done in glass, or freeform CR39, or...., Harry? I wonder what size of field you produced that to, also?

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    Master OptiBoarder MikeAurelius's Avatar
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    Cool!! I'd like to see a design layout if anyone has one.
    NSFPWDWTHTA

    The lab at Aura Visual Concepts, Inc.
    Sauk Rapids, MN 56379

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    Carl Zeiss Vision OptiBoard Gold Supporter Darryl Meister's Avatar
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    Neat, Harry.

    Using a two-part epoxy to fill in the "bowl" between each surfacing operation will result in crisp lines of demarcation. You can also offer different segment sizes by tweaking the center thickness of the cut used for the segment bowl. Regarding astigmatism, you will definitely need to grind any prescribed cylinder power on the front suface of the lens blank with any minus lenticular lens design, which makes blocking either side a chore for surfacing the other.

    Best regards,
    Darryl
    Darryl J. Meister, ABOM

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    Carl Zeiss Vision OptiBoard Gold Supporter Darryl Meister's Avatar
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    Cool!! I'd like to see a design layout if anyone has one
    Mike, the "Myotor" is essentially a myo-disc bifocal lens. If you're familiar with myo-disc lenses, instead of surfacing one bowl, for the distance aperture only, you're surfacing two, for both distance and segment apertures. And, as with myo-disc lenses, you can determine your own bowl sizes, based upon the constraints of the prescription and lens blank.

    Best regards,
    Darryl
    Darryl J. Meister, ABOM

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    Master OptiBoarder MikeAurelius's Avatar
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    Yeah, ok, that makes sense, thanks Darryl!

    Instead of epoxy, we use fiberglass resin (without the fiber of course!) when making slab-offs, and since this is very similar to that process, I don't see why it wouldn't work.
    NSFPWDWTHTA

    The lab at Aura Visual Concepts, Inc.
    Sauk Rapids, MN 56379

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    Professional Rabble-Rouser OptiBoard Bronze Supporter hipoptical's Avatar
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    I have a digital lathe and make stuff like that regularly in bifocal and SV form and can slab them as well. Allows us to do things that some of you used to do regularly on old equipment, just with more options. And easier. And faster.
    As for benefits? Cosmetic mostly. Lighter weight.
    Aim at heaven and you will get earth thrown in. Aim at earth and you get neither. C.S. Lewis

    An explanation of cause is not a justification by reason. C.S. Lewis

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