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Chemists discover how blue light speeds blindness

phys.org

201–210 of 345 posts

Re: Chemists discover how blue light speeds blindness

#201
post #45

Earlier quoted context omitted.

Interesting; when I got 2 new pair of eyeglasses last month, again I fell for the usual "buy all the coatings" spiel. I didn't much understand what they were, but I was told one causes refractions that bother some people. I absolutely notice a blue refraction from car headlights when driving at night. I keep thinking I'm seeing a police light from somewhere. It's fine, just interesting. Well, after looking at a few l…

What makes f.lux inaccurate? Color perception is relative and if you are in a dark room, your eyes should adjust to different white points naturally. This is the same thing that makes it so a white piece of paper looks white no matter whether you are inside or outside, even though the actual light reflected from the paper has a radically different spectrum in each case.

shrug. Same way the 'average' person does. Looks totally wrong. I notice it from the first minute it starts to shift. I notice it every time I look at the display of a coworker who uses it. I tried it for a few months thinking it would cue me to go home, at least, but I just started snoozing it the instant it began sunsetting -- forget the more extreme ends of the progression.

I never work in a perfectly dark room. My office is next to a window, both at home, and at work. The lights are on. Plus, all of these things help keep my pupils small which apparently helps prevent the blue light harm to begin with.

Re: Chemists discover how blue light speeds blindness

#202
post #67
post #34

"to wear sunglasses that can filter both UV and blue light" But isn't this bad with other consequences? I thought the lack of blue/violet light was the cause of myopia? https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5233810/

You can't develop myopia or hyperopia after your eyes/skull/orbital muscles are done growing. So this suggestion probably applies only to adults. Keep in mind that this is age-related macular degeneration. Your photoreceptor cells are protected by the α-tocopherol until "a person's 50s or 60s." You wouldn't need any prophylactic interventions until then.

Interesting. My myopia worsened a bit from ages 22-27 or so. Does that mean my skull and muscles were changing still?

Re: Chemists discover how blue light speeds blindness

#203

Earlier quoted context omitted.

These are relatively new features, and they arguably wouldn't have been added if not for the popularity of flux ;)

Does that matter? It's built-in now, and that's why I commented. To raise awareness. If built-in features have you covered there is no point going third-party.

I understand where you're coming from but they don't have feature parity. Flux allows me to target much lower color temperatures than MacOS' built in "Night Shift" feature. That alone makes Flux worthwhile.

Re: Chemists discover how blue light speeds blindness

#205
post #45

Earlier quoted context omitted.

Interesting; when I got 2 new pair of eyeglasses last month, again I fell for the usual "buy all the coatings" spiel. I didn't much understand what they were, but I was told one causes refractions that bother some people. I absolutely notice a blue refraction from car headlights when driving at night. I keep thinking I'm seeing a police light from somewhere. It's fine, just interesting. Well, after looking at a few l…

What makes f.lux inaccurate? Color perception is relative and if you are in a dark room, your eyes should adjust to different white points naturally. This is the same thing that makes it so a white piece of paper looks white no matter whether you are inside or outside, even though the actual light reflected from the paper has a radically different spectrum in each case.

I'm not OP but I can't stand f.lux and its clones. I never adjust. The inaccurate colors stand out to me no matter what the conditions are.

Re: Chemists discover how blue light speeds blindness

#206
post #177
post #32

Earlier quoted context omitted.

Because of the way your eyes work. If it is bright, your pupil will be shrunk, to not be blinded by the luminosity. When it is dark, your pupil will be opened wide up. It is this principle that camera apertures are based on. Now if you have your pupil wide open in a completely dark environment and put a 100% brightness screen at ~10cm of your eyes, what do you expect will happen ? Our eyes are made for nature, that m…

... but I don't put a 100% brightness screen in front of my eyes at night. Do people really do that? Don't they know how to adjust brightness? Indoors, I use about 30% brightness. As the day gets dimmer, that slides down to about 25%. If I'm reading something in bed, I start at about 10% and as my eyes adapt, go down to 1%. When I'm finding it hard to keep my eyes open, I take that as my signal to go to sleep. Am I r…

It can be beneficial to suppose a perfectly spherical cow.

You aren't unusual for trying to prevent your eyes from being harmed. If you were, an article which helps inform on the topic of eye care would not be popular.

Re: Chemists discover how blue light speeds blindness

#207
post #163

Earlier quoted context omitted.

Windows 10 has this built-in, so does macOS.

So does Fedora, courtesy of recent versions of GNOME with "Night Light" feature.

Ubuntu got that too with the switch to Gnome. Before that, I used the open source https://github.com/jonls/redshift

Re: Chemists discover how blue light speeds blindness

#208

Earlier quoted context omitted.

I'm running f.lux on my work PC (tones down a bad otherwise VERY bright-blue monitor). Thank you for reading/writing out your interpretation of the article so clearly (highlighting points others are likely to trip on not coming from a related background)

Have we fixed the “optimized for electronics store demo” problem with monitors yet? Part of my ritual of setting up a new monitor is to turn down the brightness and increase the contrast. They almost always default to very bad values. Brightness, temperature and green/blur balance are all off for an office setting. In the worst case the backlight was capable of outputting twice as much light as I really needed.

Most/all modern monitors have presets, one of which is "store demo". All you've got to do is pick the calibrated preset.

Re: Chemists discover how blue light speeds blindness

#209
post #177
post #32

Earlier quoted context omitted.

Because of the way your eyes work. If it is bright, your pupil will be shrunk, to not be blinded by the luminosity. When it is dark, your pupil will be opened wide up. It is this principle that camera apertures are based on. Now if you have your pupil wide open in a completely dark environment and put a 100% brightness screen at ~10cm of your eyes, what do you expect will happen ? Our eyes are made for nature, that m…

... but I don't put a 100% brightness screen in front of my eyes at night. Do people really do that? Don't they know how to adjust brightness? Indoors, I use about 30% brightness. As the day gets dimmer, that slides down to about 25%. If I'm reading something in bed, I start at about 10% and as my eyes adapt, go down to 1%. When I'm finding it hard to keep my eyes open, I take that as my signal to go to sleep. Am I r…

This isn't weird at all. I'm jealous of your 1%. The default low on my phone is maybe like 5-10% (I don't know how to check this), and it feels crazy bright when I'm in bed.

Re: Chemists discover how blue light speeds blindness

#210
post #44

I'm in the process of building a Philips Hue-compatible light therapy LED strip that goes above my bed, and I chose 500 nm cyan LEDs due to this concern. The goal is to have the lights gradually wake me up every morning and help align my sleep cycles, as I suffer from Delayed Phase Sleep Disorder. Figure 3[0] in the paper seems to show that 500 nm is safe, and that melanopsin has high absorption at 500nm, which has i…

Any reason why you are not just buying a Philips wake up light? I have one and it's great. Especially during darker months
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