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Thread: Backside AR on sunglasses

  1. #1
    What's up? drk's Avatar
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    Backside AR on sunglasses

    How often do you do this? Is it a good idea? Is there an issue for you with quality?

  2. #2
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    99.99% of the time. No issues. I see more(but still very infrequent) issues with the factory front side hard coat than the backside AR.

  3. #3
    Master OptiBoarder OptiBoard Silver Supporter lensmanmd's Avatar
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    What Kwill said.
    I bend light. That is what I do.

  4. #4
    What's up? drk's Avatar
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    We need to do more.

    Do you do it on sport-style wrap frames, or more fashion and general purpose frames?

    How about polar poly?

  5. #5
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    Quote Originally Posted by drk View Post
    We need to do more.

    Do you do it on sport-style wrap frames
    Yes.

    Quote Originally Posted by drk View Post
    or more fashion and general purpose frames?
    Yes.

    Quote Originally Posted by drk View Post
    How about polar poly?
    Is that the stuff I scraped off my shoe this morning that smelled terrible? I thought it was dog crap...

    90%+ of the suns I do are polarized. 1% of those are poly and only for cutout/blank size in a huge sport frame or something like that. They all still get backside AR.

  6. #6
    What's up? drk's Avatar
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    Be nice to polycarb. It's not polycrap.

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    Master OptiBoarder CCGREEN's Avatar
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    All suns should have AR IMHO. If not, your not doing your best for your pt.

  8. #8
    Master OptiBoarder DanLiv's Avatar
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    Yes backside AR EVERY sun! Spinning off from our discussion about tinting and AR drk, I rarely tint and always go for polarized (poly all the time, I have few issues). And on polarized Xperio is amazing: you get the frontside TD2 dip hardcoating, and Alize backside. And the price is excellent.

    Even if you're not doing premium lenses/AR, I would recommend even a cheap backside AR. Most labs have a pretty inexpensive basic AR that will still do a good job of reducing that backside lens reflection.

  9. #9
    What's up? drk's Avatar
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    I am derelict.

  10. #10
    Master OptiBoarder DanLiv's Avatar
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    Quote Originally Posted by drk View Post
    I am derelict.
    The first step is admitting you have a problem. Drk, now the healing can begin.

  11. #11
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    - Mindy

  12. #12
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    Quote Originally Posted by DanLiv View Post
    Yes backside AR EVERY sun!
    Even if you're not doing premium lenses/AR, I would recommend even a cheap backside AR. Most labs have a pretty inexpensive basic AR that will still do a good job of reducing that backside lens reflection.
    +1
    I just can't not do AR backside! I ALWAYS recommend it. The only exception would be something where the frame is more like a goggle and no light can come in from behind , maybe then you can get away without it (think Liberty DE cup frames). That's pretty rare though. Myself... went cheap one time and skipped it. Drove me up a wall and I can never ever again have a sun without AR backside.
    Last edited by mervinek; 09-09-2022 at 09:46 AM. Reason: typo

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    We were just discussing this in office! I always do a backside AR, whether polarized (99.4%) as well as the infrequent tinted only lens.

    I've heard a school of thought that you shouldn't backside AR tint only lenses. Does anyone want to give me thoughts on this?

  14. #14
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    Quote Originally Posted by MissMolly View Post
    I've heard a school of thought that you shouldn't backside AR tint only lenses.

    Sounds crazy to me. Was it in a fortune cookie? Who did you hear it from?

  15. #15
    OptiWizard
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    Referring to backside AR on suns

    Quote Originally Posted by Chris Ryser View Post
    Yes some people do.

    However it is another gimmick to make more sales for more money.

    Who likes it best ...............the optician that sold it.
    https://www.optiboard.com/forums/sho...light=backside

    I respect the hell out of his opinion, does anyone know where that opinion is coming from?

  16. #16
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    Quote Originally Posted by NAICITPO View Post
    Referring to backside AR on suns



    https://www.optiboard.com/forums/sho...light=backside

    I respect the hell out of his opinion, does anyone know where that opinion is coming from?

    Same place this opinion came from?

    Quote Originally Posted by Chris Ryser View Post
    Referring to progressive lenses

    https://www.optiboard.com/forums/sho...0-Progressives

    Basically they are all the same................with some small differences which every manufacturer claims that they beat the competition..

    They become pretty miserable reading instruments when used in the small narrow frames.

    They are good and perfect for women and sometimes men who do not want to admit their age............who then will suffer by having a very narrow reading area.

    They are all way overpriced as the manufacturing of them does not cost a penny more than to cast and make a regular bifocal. However this pays well to support the advertising hype towards the public who then wants more of them.
    As far as I can tell Chris thought everyone should be wearing FT35s with no AR probably in glass. Everything else was the result of greedy opticians. Unless of course it was a product he produced and sold. Chris may have invented or patented his niche items of the optical trade, coatings, tints, etc. and had his heyday during the Tillyer Masterpiece era. But I don't think he kept up, or wanted to keep up, with the rapidly changing landscape and technology of ophthalmic dispensing.

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    Quote Originally Posted by Kwill212 View Post
    Sounds crazy to me. Was it in a fortune cookie? Who did you hear it from?
    It was someone else in the optical industry. Definitely not a fortune cookie. :) I always Backside AR because it's my understanding that light can hit the back of the lens and enter the eye. Also from a practical standpoint, I can't stand the reflection myself! Just was curious if anyone else had heard not to and what the science might be behind that opinion.

  18. #18
    What's up? drk's Avatar
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    This is a good question. What makes backside reflections worse with sunglasses than indoor glasses?

    I have my theory. What's yours?

  19. #19
    Master OptiBoarder OptiBoard Silver Supporter lensmanmd's Avatar
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    Quote Originally Posted by drk View Post
    This is a good question. What makes backside reflections worse with sunglasses than indoor glasses?

    I have my theory. What's yours?
    1. Dark tints allow less light to pass through, increasing its perceived reflectivity.
    2. Sunlight is much more intense than indoor light in terms of lumens. 127K lumens vs 1600 lumens per 100W bulb.
    I bend light. That is what I do.

  20. #20
    What's up? drk's Avatar
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    I too think it's #2, too. Et tu?

  21. #21
    Eyes eastward... Uilleann's Avatar
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    Draw on a tinted piece of glass with white paint and observe the contrast between dark and light.

    Draw on a clear piece of glass with white paint and observe the contrast between dark and light.

    Both are obstructive to clear observation through the glass. One is far more obvious to the eye.

  22. #22
    What's up? drk's Avatar
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    So, you're saying a light image on a dark background has higher contrast than a light image on a clear background.

    I'll buy it!

  23. #23
    Master OptiBoarder AngeHamm's Avatar
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    Quote Originally Posted by Kwill212 View Post
    As far as I can tell Chris thought everyone should be wearing FT35s with no AR probably in glass. Everything else was the result of greedy opticians. Unless of course it was a product he produced and sold. Chris may have invented or patented his niche items of the optical trade, coatings, tints, etc. and had his heyday during the Tillyer Masterpiece era. But I don't think he kept up, or wanted to keep up, with the rapidly changing landscape and technology of ophthalmic dispensing.
    Chris hated all AR and thought all glare problems could be solved with tints. Bless him, he is dearly missed, but his antiquated attitudes toward the last forty years of lens designs are not.
    I'm Andrew Hamm and I approve this message.

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