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Study: Blue light impairs the eye's ability to distinguish fine detail most

research.uga.edu

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Re: Study: Blue light impairs the eye's ability to distinguish fine detail most

#51

Post by bunderbunder »

keymasta wrote: post #14

I've had some light-sensitivity issues for as long as a remember. So I always get glasses with transitions. On computer though I've always been using flux [0] since it came out. I know that now a lot of OSes are supporting some kind of night mode, but I really like how there are some different parameters you can adjust in flux. And it's free. [0] https://justgetflux.com/

I've discovered, for my part, that wearing yellow glasses works even better than f.lux when I'm working in an environment where I can't control the ambient lighting.

Re: Study: Blue light impairs the eye's ability to distinguish fine detail most

#52

Post by QuercusMax »

rconti wrote: post #47

First thing I thought of when I read the title was "ah, I learned this from Daniel Stern's lighting page..." https://www.danielsternlighting.com/tech/bulbs/blue/bad/bad....

I was curious what Marv from Home Alone had to say about lighting... guess it must be a different guy!

Re: Study: Blue light impairs the eye's ability to distinguish fine detail most

#53

Post by vanderZwan »

dinfinity wrote: post #17
mkl wrote: post #3

Isn't this well known? The human retina has fewer blue-sensitive cone cells, and very few in the fovea, which sees the sharpest details: https://en.wikipedia.org/wiki/Cone_cell#Distribution

Well, the title here at HN implies something else than the study shows. If blue light actually impaired vision, that would be very notable. It would mean that removing the blue 'channel' for an RGB image would improve acuity. This is not what the study showed, however. It is mainly just the basic fewer cones bit you mentioned. Which, btw, is easily experienced if you ever look from a distance at neon or led signs tha…

> If blue light actually impaired vision, that would be very notable.

It is extremely noticeable for me at night because I can never fully focus on signs using blue LEDs, while red LEDs give me no problem.

Re: Study: Blue light impairs the eye's ability to distinguish fine detail most

#54

Post by AngryData »

BoingBoomTschak wrote: post #24

Looks like we French had the right idea with yellow headlights? https://en.wikipedia.org/wiki/Selective_yellow

Ive seen a truck with super yellow light addons and I have to say they were surprisingly horrible and hard to look at. Red and orange still seem okay but the yellow ones were just painful. But perhaps they were also broadcasting a bunch of white light too with it because ive only seen those style twice.

Re: Study: Blue light impairs the eye's ability to distinguish fine detail most

#55

Post by AngryData »

Simulacra wrote: post #6

Interesting, i've read in the past that blue lights are used sometimes in places where they want to dissuade people from intravenous drug use because the blue light makes it harder to find a vein. I wonder if that qualifies as fine detail.

We should also note that it is a gimmick meant to sell expensive specialty bulbs. Addicts don't need good light to find a vein. And even if it was a problem they still have a lighter and/or phone.

Re: Study: Blue light impairs the eye's ability to distinguish fine detail most

#56

Post by aaron695 »

vanderZwan wrote: post #44
kazinator wrote: post #34

Earlier quoted context omitted.

Nope; here is 2013 research about it: https://pubmed.ncbi.nlm.nih.gov/22527312/ And 1991: https://www.sciencedirect.com/science/article/abs/pii/004269... It has to do with stray light diffusing much more easily through unpigmented irises than pigmented.

And did those studies use the same methods as this one? Because this makes it look like they didn't: > Methods: In this retrospective cohort study, which is a subgroup analysis of a large prospective trial about visual impairments in European car drivers, we included 853 persons between 20 and 80 years of age and without a history of ocular surgery or any eye disease including cataract. Subjects participated in an op…

[dead]

Re: Study: Blue light impairs the eye's ability to distinguish fine detail most

#57

Post by vanderZwan »

jmpman wrote: post #29

How was this study not done back in the 1950s?

Well, I can think of a couplo of reasons why a black Ghanaian man would not be likely to pursue his PhD at the University of Georgia in the 1950s, but I'm not sure if that was the question you were begging for.

Re: Study: Blue light impairs the eye's ability to distinguish fine detail most

#58

Post by lightedman »

amluto wrote: post #46
lightedman wrote: post #37

Earlier quoted context omitted.

"On a related note, anyone wearing prescription glasses will be affected by chromatic aberration to some degree" Fluorite lenses FTW. Practically zero aberration. CR-58 pales in comparison.

Eww, that's awful. Calcium fluorite has a rather low IOR and is very dense. What you want is a sapphire lens, except that the birefringence might be problematic.

That birefringence in corundum is why fluorite is used. Fluorite lenses low index of refraction across all wavelengths is also the reason for lacking chromatic aberration.

Fluorite lenses are generally superior. For macro photography there is literally no equivalent.

Re: Study: Blue light impairs the eye's ability to distinguish fine detail most

#59

Post by bunderbunder »

mkl wrote: post #36
bunderbunder wrote: post #18

Earlier quoted context omitted.

From the paper's abstract (emphasis mine): "Wavelength influences multiple aspects of visual performance, yet its role in spatial resolution remains incompletely understood due to confounding factors such as luminance differences, chromatic aberration, and intraocular scatter." They then did some modeling to estimate how well the results could be explained by scattering, chromatic aberration and, neural sampling (the…

Ah, another over-claiming university press release. That explains it!

I don't think it over-claimed anything? Maybe over-simplified for certain purposes. But to expect a press release to be a complete accounting of the research it reports on is to misunderstand the purpose of press releases. A press release that says everything that's in the paper would be pointless and redundant.

Re: Study: Blue light impairs the eye's ability to distinguish fine detail most

#60

Post by amluto »

lightedman wrote: post #58
amluto wrote: post #46

Earlier quoted context omitted.

Eww, that's awful. Calcium fluorite has a rather low IOR and is very dense. What you want is a sapphire lens, except that the birefringence might be problematic.

That birefringence in corundum is why fluorite is used. Fluorite lenses low index of refraction across all wavelengths is also the reason for lacking chromatic aberration. Fluorite lenses are generally superior. For macro photography there is literally no equivalent.

You are welcome to wear a macro lens cantilevered out from the bayonet mount built into your face :) I would prefer a lightweight, or at least not outrageously thick and heavy, pair of glasses.
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