Crizal Prevencia glasses

reaganry

AGI prescription lenses - to block the blue light spike from screens.. the prescription was too strong to see my iphone so i had to take them off. 5 seconds later & i'm all fuzzy

AGI

reaganry Thanks for the update. Do I get it right that you cannot draw conclusions on the effect of the blue light filter because the prescription of the lenses was wrong?

reaganry

AGI correct

AGI

Glasses for Lazy Eye

ensete

diop Therefore the ball lies in the technology, as hpst has stated before, if I have never had any issues with any screen-based technology until suddenly in the last 5 years, would you really believe it is a biological problem?

It is a brain problem. Technology is not "solving" the issue,it is avoiding the issue.

but as we know that dithering is the quick-movement of pixels, surely in principle that would disturb the end user in some way?

Dithering is not everyone's trigger. In my case, color is the trigger, dithering and flicker have no effect on me. It is a brain issue, and everyone's brain is unique

Has anyone tried the TheraSpecs glasses? In their site they talk about blue light filtering and blinking lights.

These are just a branded version of FL-41 coating that has been available for years. You can get the coating added to any lens you like. I've had custom FL-41 and Theraspecs, neither did a thing.

If there is not then we just won't ever be able to use displays again and that's untenable in my case at least.

It is a health problem, triggered by technology. Displays are always changing. Personally, I have high hopes for e-ink/e-paper displays, which have no backlight at all and are just like reading a book. But until then, yeah, it's a struggle. I'm rocking a 10 year old smartphone cause I can't find a new one that doesn't trigger my symptoms. I've bought and returned 37 so far. C'est la vie.

diop

ensete It is a health problem, triggered by technology. Displays are always changing. Personally, I have high hopes for e-ink/e-paper displays, which have no backlight at all and are just like reading a book. But until then, yeah, it's a struggle. I'm rocking a 10 year old smartphone cause I can't find a new one that doesn't trigger my symptoms. I've bought and returned 37 so far. C'est la vie.

I wouldn't necessarily label it as a health problem, I could go months without symptoms by simply avoiding the 'bad' devices. Supposing we do have some rare sensitivity to a certain flicker frequency/backlight/color range, the onus is on the tech industry to support the needs of the users and not for us to be left behind. It still baffles me that there is such a small vocal minority on the web when we consider the ubiquity of smartphones, app-centric and LED-driven tech nowadays.

ensete

diop the onus is on the tech industry to support the needs of the users and not for us to be left behind

While I wish the world worked that way, unfortunately, it just doesn't. We are a very extreme minority of users, not representing a major market share, and to date no one in either our community, the medical community, or the technology companies themselves have even been able to definitively diagnose WHAT the problem is, let alone investing in the engineering needed to address it. History is rife with companies putting dangerous additives into common consumer products and even when the effects were devastating on a global scale (leaded gasoline, lead paint, CFC's, radium, narcotics) and the solution was obvious, it took decades for the respective industries to address the issues. A historically new issue, effecting a tiny, tiny slice of the population, where the actual root cause is still unknown? I am a betting man and I wouldn't put my money on it every being solved on the supply side of the equation. Nothing would make me happier to be proven wrong, but I'm not hopeful at all. So it's on us to navigate a pain free path as much as we can by experimenting, sharing information, and supporting each other.

It still baffles me that there is such a small vocal minority on the web when we consider the ubiquity of smartphones, app-centric and LED-driven tech nowadays.

99.9% of people use that tech every day, all day long, with no symptoms. We are the fringe, and human compassion drops off at an exponential rate the smaller the impacted population gets.

diop

ensete While I wish the world worked that way, unfortunately, it just doesn't. We are a very extreme minority of users, not representing a major market share, and to date no one in either our community, the medical community, or the technology companies themselves have even been able to definitively diagnose WHAT the problem is, let alone investing in the engineering needed to address it.

I guess I'm still finding it hard to swallow that I am part of an extremely small minority in this situation given how my life was before 2015. I could buy any device and have used every mainstream gadget you can think of since the 80's, and during my childhood. I literally never had symptoms until I tried MacOS in 2015, and although I'm not allergic to LED lighting, it is noticeably much harsher than pre 2010 LED lighting and the golden days of incandescent..

The thing is we haven't got the off switch for dithering on the GPU and Driver level after all this time. We still can't rule that out as an aggravator due to this fact. The tech companies are not giving us the choice to disable it, even for beta testing purposes, so unless somebody rolls their own dither-free Linux distro soon, we're out in the cold and at the mercy of these corporations.

ensete History is rife with companies putting dangerous additives into common consumer products and even when the effects were devastating on a global scale (leaded gasoline, lead paint, CFC's, radium, narcotics) and the solution was obvious, it took decades for the respective industries to address the issues

I agree, it's not the first time and probably won't be the last. Asbestos roofing which was prevalent in the last century has been known for decades to be poisonous.

ensete 99.9% of people use that tech every day, all day long, with no symptoms. We are the fringe, and human compassion drops off at an exponential rate the smaller the impacted population gets.

I would be interested to know over the last decade if there has been a spike in epilepsy-related diagnoses and eye disorders such as glaucoma/cataracts. Whether or not individuals get the symptoms we do, it has been scientifically proven that blue light is causing suppression of melatonin and affecting not just human beings but also wildlife. This topic is still rarely covered in the mass-scale media and is another case of the tech being pushed out before the research. I still find it hard to believe that these "scientists" could create LED lighting in phones etc with such a prominent blue spike but not have the means to measure it and prioritise the comfort of the public before mass-production.

AGI

I have been using for a few days glasses with blue filter, anti-reflective coating (ARC), rose/orange tint (can't really tell the exact color) and 0.5 astigmatism correction on the left lens. I ordered them because weeks ago I pulled out 20 years old prescription-free glasses with ARC, which I had been recommended for driving at night and never used, and noticed a better visual experience in front of (glossy) video-terminals.

Based on a few days of use, I am definitely convinced that, whenever I look at something which is retro-lit like a monitor or a road / shop sign, there is a considerable difference with and without glasses. With the glasses on, characters appear neater and better contrasted on the white background (I do not know on other backgrounds).

Now, my preliminary opinion is that what makes the difference is the ARC. The new glasses do not feel better than the old ones that have only an ARC.
The rose tint, which I bought as a means of protection from offensive overhead lighting, seems to be inducing moderate dizziness / discomfort, especially if I wear the glasses outdoors.
As I thought, correcting 0.5 astigmatism is quite pointless. I actually wonder if it makes things slightly worse?
I can't yet comment on the role of the blue filter. However, when I disable Flux and wear the new glasses, my eyes get quickly tired and inflamed. It could be that I need to get used again to different color temperatures. I have been for long at 4100 K during the day and 3000 K at night.

In conclusion, as I feared, I may have wasted some hundred dollars and learned the hard way that tint and blue filter are not game changers (for me). As to the comment on the ARC, I do not want to insult people who have serious problems like I have, e.g. get bedridden after 5 minutes of exposure to a Samsung S10. I just find that the ARC makes my visual experience better specifically to glossy screens / back-lit signs. I am not sure if I would draw the same conclusion in front of a matte display. I also think that the ARC rather than the blue filter or the tint is what provides some degree of shelter from offensive fluorescent lamps (I have not tested the glasses under LEDs yet).

ryans

My new prisms will have Crizal Prevencia in it. I thought there were better options nowadays, but this is what the optician recommended.

Anyone still using Crizal Prevencia? @JTL ?

Peter

ryans I still use them. They help on XPS 13 with eyesafe technology

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