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    I'm just trying to bring a little musical joy to...

    I'm just trying to bring a little musical joy to the peoples, not breakup relationships!

    Glad you liked, and tell the Missus I take requests.

    Robert
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    Heart and The Jason Bonham Experience - Stairway...

    Heart and The Jason Bonham Experience - Stairway to Heaven 2012


    https://www.youtube.com/watch?v=LFxOaDeJmXk
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    No, monovision on the spectacle plane doesn't...

    No, monovision on the spectacle plane doesn't work.

    There's a reason OTC readers are called cheaters, and it's not because ophthalmic professionals are being cheated.


    ...
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    Introducing prism to neutralize induced prism on...

    Introducing prism to neutralize induced prism on the primary gaze is an accepted practice for dealing with PALs and anisometropia. It's SOP if you order a slabbed PAL from Zeiss. And you're right,...
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    We used to do that on segmented multifocals,...

    We used to do that on segmented multifocals, positioning the distance OC at the "top of the seg", usually for low values of imbalances, avoiding the cost of a slab but still minimizing asthenopia.
    ...
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    Essential, IMO. If you don't have access to the...

    Essential, IMO. If you don't have access to the history (outside RXs), acquire a trial lens set and frame and do it yourself. It will save both the wearer and the optician time and money, and no...
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    Judy Collins/Pete Seeger Turn! Turn! Turn! 1966 ...

    Judy Collins/Pete Seeger Turn! Turn! Turn! 1966


    https://www.youtube.com/watch?v=qURAnrk30ng
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    In the lensometer, assuming 2 D of equithin,...

    In the lensometer, assuming 2 D of equithin, we'll read 2∆ BD OD and 1.5∆ BD OS, for a total prescribed vertical prism imbalance of .5∆ BU OS (or .5∆ BD OD).

    However, as mentioned by Lensman11,...
  9. No. Some of the very soft design PALs will let...

    No.

    Some of the very soft design PALs will let some of the add power creep into the distance reference point- make sure you measure at that point, typically 4mm to 6mm above the fitting cross,...
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    Bo Diddley - Road Runner 1972 ...

    Bo Diddley - Road Runner 1972



    https://www.youtube.com/watch?v=ijjPEmej-eg
  11. Terry, I doubt that any coating will hold up...

    Terry,

    I doubt that any coating will hold up to the abrasive particles that will accumulate on the lenses of a landscaper.

    Good idea on bumping the CT to reduce transmittance. Here's a chart...
  12. https://www.optiboard.com/forums/showthread.php/27...

    https://www.optiboard.com/forums/showthread.php/27631-The-logic-of-flatter-base-curves

    Mostly a problem with low minus through high plus. CC can be distortion, lash crash, reflections when...
  13. Check that the clock is accurate. I doubt that...

    Check that the clock is accurate. I doubt that the lab is physically measuring the lens- isn't this all robotic now at PSV sbaL?

    Double check that the lenses on the recent pair are not warped-...
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    Dire Straits - Sultans of Swing 1978 ...

    Dire Straits - Sultans of Swing 1978


    https://www.youtube.com/watch?v=unfDWOAQ0L0
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    https://www.zeiss.com/vision-care/int/about-us/new...

    https://www.zeiss.com/vision-care/int/about-us/newsroom/news-overview/2019/zeiss-smartlife-fact-sheet.html

    As always, I'm skeptical. Hopefully, they'll give us an override function, if the lens...
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    Nina Simone - I Put A Spell On You 1968 ...

    Nina Simone - I Put A Spell On You 1968


    https://www.youtube.com/watch?v=W7mBQhfkqHs
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    Written a full 20 years before full backside...

    Written a full 20 years before full backside progressives (base curve front surface, progressive optics/multifocal back surface) from Rodenstock/Multigresiv and Zeiss/Individual became available to...
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    True for segmented multifocals, but not for most...

    True for segmented multifocals, but not for most PALs. Darry's definition is spot on- I don't see how it can be improved on.

    Yup, it's been about 20 years since I've seen a backside Ultex (B?)....
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    The back side (concave), using the definition...

    The back side (concave), using the definition below.


    https://www.optiboard.com/forums/showthread.php/1959-Base-Curves?p=13572&viewfull=1#post13572

    More useful data from Darryl Meister in that...
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    The Camber blank will have less center thickness...

    The Camber blank will have less center thickness (reduced magnification) and a thinner profile compared to spherical blanks for hyperopic presbyopes, especially when the total power (distance + add)...
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    Loudon Wainwright - Red Guitar 2008 ...

    Loudon Wainwright - Red Guitar 2008


    https://www.youtube.com/watch?v=sNdvH92UM6g


    https://www.youtube.com/watch?v=eiKBGViXdwI
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    Melanie - Ruby Tuesday 1977 Goodbye 2019,...

    Melanie - Ruby Tuesday 1977

    Goodbye 2019, hello 2020.


    https://www.youtube.com/watch?v=vH8SVGoJzvE
  23. We'll rarely need lenticulation at this age...

    We'll rarely need lenticulation at this age because of the small eye size. Semi-finished Trivex should be considered for the best safety and low chromatic aberration. The -3.00 cyl kicks it out of...
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    Fairport Convention - Time Will Show The Wiser...

    Fairport Convention - Time Will Show The Wiser 1968


    https://www.youtube.com/watch?v=vPTI4m6KcJQ
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    Holiday Impressions

    'Twas the Night Before Christmas

    https://www.optiboard.com/forums/showthread.php/56720-Twas-the-night-before-Christmas

    Follow-up with a twist 2019

    ...
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