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Thread: Blue light protection

  1. #26
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    I was suitably ****** when I recently stopped into a new LC near me just to scope them out and overheard an "optician" selling a patient lenses on the basis that they would "prevent eye cancer." I wanted to blow my lid but also didn't want to blow my cover.

  4. #29
    Compulsive Truthteller OptiBoard Gold Supporter Uncle Fester's Avatar
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    I'm making all kinds of points when I tell patients this is a scam.

    AR for better vision absolutely- Blue Light blocking not.

    I work with patients who are often immigrants and some of the smartest people in the world.

    They love me for my honesty.

    Turn off your screens 2 hours before bedtime.

    During the day- 20- 20- 20 !!!

    AND BLINK!

    The American Academy of Ophthalmology recommends the 20/20/20 rule to decrease the risk of ocular discomfort: every 20 minutes, shift your focus to an object 20 feet away for at least 20 seconds.
    Last edited by Uncle Fester; 11-24-2019 at 10:07 PM. Reason: tweak...

  5. #30
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    There are some limited effects of blue light - on the magnocellular system, on circadian ryhthms, on arousal. There is also an argument that high intensity blue light may cause retinal harm - but the amounts of energy needed appear to be significant, and may also be very wavelength dependent. But the effects vary from person to person and empirical prescribing is not necessarily appropriate. Virtually any yellow / orange lens will reduce blue light, usually significantly more than a coating although it could be argued that using a notch dichroic filter is more appropriate. In top end lighting design (humancentric lighting) there is a tendency to modify the levels of blue during the day to change arousal, this works in some cases but is actually counterproductive in others. There is an interesting effect which does not seem to have been addressed - many people wear yellow lenses for night driving, the coated lenses often work even better! But there has not been to my knowledge any trials done.

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    Master OptiBoarder AngeHamm's Avatar
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    As an aside, we are not doing our patients any favors by referring to this as "blue light." The color blue is not hurting anyone. The HEV Blue part of the spectrum, on the other hand, is something of an issue.
    I'm Andrew Hamm and I approve this message.

  7. #32
    Eyes eastward... Uilleann's Avatar
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    To my knowledge, there has never been a single in vivo study of the effect of "blue light" on an actual human retina. Blasting cultured rat retinal cells in a petri dish with high intensity blue lasers isn't of course, anything remotely like what our eyes experience day to day. But that is the research that was used as the basis for much of the "bad blue light" marketing claims. It's such a jumping-the-shark type claim, it's laughable. As for the circadian rhythm/sleep patter disruption evidence, sure. OK. But does that *REALLY* require a ridiculous, and expensive lens to counter? Or can we all just learn to turn the blue down one or two clicks on our monitors, tablets, and cell phones - which has been shown to have a FAR greater reduction of "blue light" than any lens currently available provides? Or we could just, you know, realize that screens all the time aren't doing us any favors for many more reasons than the "bad blue light" myth.

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    We were asked by one of the lighting companies to look at effects of various colour temperatures (from 1800K to 10 000K) on people - result - variable effects - and unpredictable. I suspect that the blue light controversy is more a marketing ploy. However, some people are affected - positively and negatively - but there is a need for professionals to be able to determine the effects of tints - perhaps this is the time to mention my book "a professionals guide to prescribing tints and filters" Over 250 pages of sheer joy, reading about lighting, tints and filters, tests you can do, observations etc. A perfect Christmas gift for those that have everything

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    Compulsive Truthteller OptiBoard Gold Supporter Uncle Fester's Avatar
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    Unfortunately they do not qualify until the end (by The American Academy of Ophthalmology), but here's an interesting and deep dive article from when protecting retina's from HEV blue light was all the rage:

    https://www.forbes.com/sites/fionamc.../#2e83d12a384b

  10. #35
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    Quote Originally Posted by jarralad2 View Post
    We were asked by one of the lighting companies to look at effects of various colour temperatures (from 1800K to 10 000K) on people - result - variable effects - and unpredictable. I suspect that the blue light controversy is more a marketing ploy. However, some people are affected - positively and negatively - but there is a need for professionals to be able to determine the effects of tints - perhaps this is the time to mention my book "a professionals guide to prescribing tints and filters" Over 250 pages of sheer joy, reading about lighting, tints and filters, tests you can do, observations etc. A perfect Christmas gift for those that have everything
    I would be curious to know if you have an estimate of what percent of the population would benefit from this type of prescribing? Or better yet what percent have their lives adversely effected by not having a tint or filter prescribed? Just trying to get a handle on the scope of the issue.

  11. #36
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    around 15-20% of people have significant effects - but whether you prescribe for that many - probably nearer 5-10 really benefit enough to say it is critical to visual performance

  12. #37
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    Quote Originally Posted by Uncle Fester View Post
    I'm making all kinds of points when I tell patients this is a scam.

    AR for better vision absolutely- Blue Light blocking not.

    I work with patients who are often immigrants and some of the smartest people in the world.

    They love me for my honesty.

    Turn off your screens 2 hours before bedtime.

    During the day- 20- 20- 20 !!!

    AND BLINK!

    The American Academy of Ophthalmology recommends the 20/20/20 rule to decrease the risk of ocular discomfort: every 20 minutes, shift your focus to an object 20 feet away for at least 20 seconds.

    hello,

    honestly speaking who is going to implement and keep a track of the 20/20 rule and how will you do it?? Would you keep a timer on your phone for every 20 minutes? Doesn’t seem practical to me.

  13. #38
    Master OptiBoarder AngeHamm's Avatar
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    Quote Originally Posted by Opticia_n View Post
    hello,

    honestly speaking who is going to implement and keep a track of the 20/20 rule and how will you do it?? Would you keep a timer on your phone for every 20 minutes? Doesn’t seem practical to me.
    There are apps to help remind you. Much simpler than setting your own alarms.
    I'm Andrew Hamm and I approve this message.

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