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Chemists discover how blue light speeds blindness

phys.org

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Re: Chemists discover how blue light speeds blindness

#111

Post by shittyadmin »

Raphmedia wrote: post #58
shittyadmin wrote: post #30

Earlier quoted context omitted.

The biggest problem I have with it is that everything looks so much worse that I just wind up turning it off all the time. Is this so seriously a threat to vision that it's worth it? I don't have the sleeping issues with screens some people seem to report, so I wasn't really willing to commit to it over that.

> The biggest problem I have with it is that everything looks so much worse that I just wind up turning it off all the time. Change the settings. What you should do is take a sheet of paper and put it next to your screen. Then match your screen's white to the sheet. It's only a bit less blue. There's no need to set everything dark orange.

Okay, but that's a trade-off, you're still getting a fair amount of blue light through in that case. How much less blue light do you want? What's optimal for minimizing eye damage if that's a significant risk?

Re: Chemists discover how blue light speeds blindness

#112

Post by zachrip »

I was recently diagnosed with a condition called retinitis pigmentosa (it basically just destroys your retinas). It's part of a larger condition called usher syndrome (which caused my severe hearing loss at birth). I'm on heavy doses of vitamin a palmitate as well as some other vitamins. Another thing that I haven't done yet but will be doing shortly is blue light blocking glasses, especially since I sit in front of a computer all day. I also use f.lux and night shift on windows and mac respectively. I'm 22 and have lost a significant portion of my night and peripheral vision so I'm still just trying to figure this all out. Any tips are welcome.

Re: Chemists discover how blue light speeds blindness

#113

Post by jt2190 »

rconti wrote: post #45
_nkoa wrote: 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…

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…

> I absolutely notice a blue refraction from car headlights when driving at night.

I think some ultra-bright headlights are actually slightly blue.

Re: Chemists discover how blue light speeds blindness

#114

Post by [deleted] »

Brakenshire wrote: post #66
rconti wrote: 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…

Isn't blue light important in the mornings for keeping the circadian rhythm aligned? I thought you were supposed to avoid it in the evenings only. Probably it'd be fine for you if you're getting a lot of light, but might be bad if you don't.

[deleted]

Re: Chemists discover how blue light speeds blindness

#115

Post by namibj »

Brakenshire wrote: post #78
Eochei5h wrote: post #59

Earlier quoted context omitted.

Check the spec sheet of the bulbs, specifically the color temperature in kelvin. Ignore the "warm white" and similar marketing terms, they are too fuzzy. A LED with low color temperature and high CRI should have pretty much the same spectrum as incandescent. If you want really low temperatures look for some retro filament style LED lights. https://en.wikipedia.org/wiki/Color_temperature#Categorizing...

CRI unfortunately is not a good test, it still can produce very high ratings even when the spectrum is spiky.

95+CRI is an indicator for mostly lack of spikes. Look at Yuji (yujiintl.com), they seem to be the only ones selling actual high-CRI LEDs with sane pricing (i.e., no ideological markup).

Re: Chemists discover how blue light speeds blindness

#116

Post by niceperson »

derefr wrote: post #67
gregcrv wrote: 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.

>You can't develop myopia or hyperopia after your eyes/skull/orbital muscles are done growing. Do you have a source for that?

Would the inverse also be true?

Re: Chemists discover how blue light speeds blindness

#117

Post by downrightmike »

lawlessone wrote: post #47
corpMaverick wrote: post #15

From the article... To protect your eyes from blue light, Karunarathne advises to wear sunglasses that can filter both UV and blue light outside and avoid looking at your cell phones or tablets in the dark." Please share any additional actionable advice.

Wear Sunscreen Start a pension.

Go back in time and plant a tree.

Re: Chemists discover how blue light speeds blindness

#118

Post by squarefoot »

I deeply hate blue leds, never liked them. As an electronics hobbyist I have been used for many years to the old red then green and yellow leds before the blue and later white ones came out, so I rushed out to buy some as soon as I could and while trying them I remember feeling uncomfortable staring at that light, to the point I never used them in anything: they're staying in their box for good. I already know about the blue light altering the circadian rhythm, but didn't back then, so it's possible the brain was sending a message there was something wrong with that light.

Re: Chemists discover how blue light speeds blindness

#119

Post by Eric_WVGG »

mikeleeorg wrote: post #92

For the f.lux Mac users here, do you prefer that to Mac's Night Shift? I just found this article, which details why f.lux is better than Night Shift. But it's written by f.lux, so it's a bit biased. https://9to5mac.com/2017/03/28/flux-developer-says-apples-ne... I'm guessing both are better than nothing, but is one actually better than the other?

I've been using F.lux for over seven years. Advantages…

- You have a great deal of control over the blue level. Night Shift's blue level is higher than F.lux's default, and not adjustable.

- Flux transitions more naturally as the sun goes down.

- More scheduling options, "disable until tomorrow".

- the big one: disabling per-app or for full-screen apps. You probably don't want Flux on while watching a movie or binging on a videogame. (I set up my lady friend with Night Shift and watched a movie with her recently, spent the whole film wondering why they made such awful color choices)

Re: Chemists discover how blue light speeds blindness

#120

Post by enos »

Eric_WVGG wrote: post #119
mikeleeorg wrote: post #92

For the f.lux Mac users here, do you prefer that to Mac's Night Shift? I just found this article, which details why f.lux is better than Night Shift. But it's written by f.lux, so it's a bit biased. https://9to5mac.com/2017/03/28/flux-developer-says-apples-ne... I'm guessing both are better than nothing, but is one actually better than the other?

I've been using F.lux for over seven years. Advantages… - You have a great deal of control over the blue level. Night Shift's blue level is higher than F.lux's default, and not adjustable. - Flux transitions more naturally as the sun goes down. - More scheduling options, "disable until tomorrow". - the big one: disabling per-app or for full-screen apps. You probably don't want Flux on while watching a movie or bingin…

- Night Shift is disabled for external displays. That's another killer one.
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