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  1. To add to this are you measuring from the deepest...

    To add to this are you measuring from the deepest part of the frame following the boxing method, to pupil height? if not then for sure a SH issue.
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    58 will be Polycarb, the Eqt could be a Essilor...

    58 will be Polycarb, the Eqt could be a Essilor lens, fit them with the best and you will have no issues.
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    4,533

    Brittle Cellulose Acetate Frames - Reasons?

    Hi All,

    working at compiling a list of reasons why a Cellulose Acetate frame becomes plasticized and goes brittle - apart from age, heat, alcohols etc.
  4. Thread: We're all stumped.

    by Bok
    Replies
    37
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    16,531

    We had a job like this once, and after all the...

    We had a job like this once, and after all the frame adjustments under the sun and rechecks done we put the lenses under a polariscope and found a flat spot from blocking right on optical centre...
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    reflectance % of a non AR coated lens?

    Hi there,

    Is there a calculation to calculate how much more of a % of reflectance a particular index of lens will have with or without an A/R?

    For instance, how much % will a 1.74 lens with an...
  6. Thread: New tech!

    by Bok
    Replies
    1
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    4,769

    Excellent! can't wait for this technology to be...

    Excellent! can't wait for this technology to be encorporated inside the existing shell of a pair of spectacles. not extra added peices. This looks great so far though
  7. Thread: Does it exist?

    by Bok
    Replies
    5
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    6,793

    Fairly certain Shamir Optical will do it, if you...

    Fairly certain Shamir Optical will do it, if you can source from there. Otherwise it doesn't exist any more.
  8. Thread: 1.74 Like it?

    by Bok
    Replies
    23
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    15,265

    Exactly right.. I have two sets made up as...

    Exactly right..

    I have two sets made up as 'demo' pairs. One set has -4.00 lenses on eye with 1.5 the other 1.67 another set has same rx but 1.5 and 1.74, then to make a point I have -8.00 in the...
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    Robotious contact me directly I also work for the...

    Robotious contact me directly I also work for the same group but over the ditch in NZ, I am more than happy to help you on your study quest. Email as below mate.

    edit: removed email.
  10. Thread: Optical Apps

    by Bok
    Replies
    36
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    24,831

    Harry, I have been working on a similar...

    Harry, I have been working on a similar application but for PC your app looks great so far, keep up the hard work and would love to see the final product. your PD measurement looks interesting I had...
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    Rayban sunglass sports wrap Rx? Glazeable?

    Hello,

    whats your thought on a ray ban frame model RB4068 being glazed with the following prescription details?

    RE -2.00
    LE -2.00/-0.25x180

    PD 33/33.5 Height:25mm Above Rim
    22deg facial...
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    4,234

    Nope but have done a clip on with a +1.00Int &...

    Nope but have done a clip on with a +1.00Int & +2.00Nr trifocal seg stuck to the front of it.

    But wouldn't do it again, would tell the person to get another pair of glasses or just get a...
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    Welcome to the forum Renivee, one question? have...

    Welcome to the forum Renivee, one question? have you put together a business plan? researchs shows that businesses have a higher tendancy to fail without a business plan, I would strongly suggest you...
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    8,410

    Do you have an example of a sheet that measures...

    Do you have an example of a sheet that measures O.C to lens edge etc?
  15. Replies
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    8,410

    Hi-jack away, it's good listening to what some...

    Hi-jack away, it's good listening to what some have done and what I should look at with designing my own chart.

    I have done an approximate thickness calc but was looking at trying toget it more...
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    Calculate Front Curve from the following Details

    Above rim
  17. Replies
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    2,519

    Or what about Radius? R1 and R2?

    Or what about Radius? R1 and R2?
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    Calculate F1 and F2 from certain variables

    Hello,

    If given the following set of variables how would one calculate the front curve F1 and the back curve F2?





    Sph
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    there is 20/20 magazine?

    there is 20/20 magazine?
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    4,810

    Cheers for the correction, quickly typed that one...

    Cheers for the correction, quickly typed that one whilst at work, didn't double check. lesson for next time :)
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    As above answer but background info on what I...

    As above answer but background info on what I think your asking.

    By the sound of it your wanting to locate to circle of least confusion in a toric prescription.

    The location of the circle of...
  22. -2.25/-1.50x45 - concerned with horozontal...

    -2.25/-1.50x45 - concerned with horozontal prismatic error. your axis is not on the horozontal meridian so calculate the power on the 180 which would be -3.00 RE decenter that by 3 so your calc now...
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    This is what was going through my head also,...

    This is what was going through my head also, weight loss=adjustment in blood sugar=fluctuation in Rx. Never associated weight loss with astigmatic reduction
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    Weight loss and Astigmatism?..

    Well, a client today claimed that over a dioptre decrease in his astigmatic correction was related to recent weight loss.

    Anyone else heard of this or know of any studies that have taken place...
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    Thanks.. I never thought of that..?

    Thanks.. I never thought of that..?
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