@WhiteOleander said in "Blue light thing" debunked:
So, bottom line - true, blue light might not be an issue for some people.
Age-related macular degeneration could potentially be an issue for everyone given a bright enough monitor and enough decades of using it!
Not a single mention of blue light and age-related macular degeneration - this is what people should be most worried about in my opinion.
My current computer monitor has a rather large 32" display, with a light output of 400 NITS.
When looking at an all-white page, such as the Google homepage or a Word document, you can really feel the intensity of the light hitting you (and you can feel your eyes relax when f.lux kicks in and throttles the blue light). If I wake up and try to check your email on my computer when my room is still dark and my eyes haven't adjusted to light, it takes me 30-60 seconds to be able to open them normally - the monitor is so bright that it feels like I'm trying to look at the sun!
My point is that modern monitors can be very large and very bright - and a lot of that light is blue. When they do studies, the subjects probably aren't looking at $700, 32" monitors capable of outputting 400 NITS, with a mostly white background for 8 hours per day (which is what I'm exposed to if I don't run f.lux).
There are conflicting reports about whether or not blue light from electronic devices can accelerate age-related macular degeneration. Google "blue light age related macular degeneration" and you'll notice there isn't a consensus. Some studies say it's fine - others say there are already early signs that it could be wearing out our retinas by bombarding them with years (or decades) of high energy blue light.
Sure, blue light is natural... but we didn't go around staring up at the sky for 8 hours a day for 50 years. Modern technology has made this sort of exposure happen to a much greater extent than it ever would naturally!
Different studies have reached different conclusions but I suspect, as computer monitors with increasingly bright displays (i.e. more NITS) become ever more common, decades of using them may eventually lead to a problems that show up in more studies. We're basically guinea pigs.
What's my advice?
As a 36-year-old guy who works with computers on a daily basis, and with probably 50 more years of using a computer ahead of me, I take my eye health very seriously and look out for potential problems on the horizon while I can still easily nip them in the bud.
The fact that people are having conversations now about the possible link between age-related macular degeneration and years of using bright screens is the reason why I use f.lux! I don't care about circadian rhythms (I sleep just fine) or dry eyes (I consciously blink more when using a computer). But AMD is something else entirely. It creeps up on you and it makes sense to me that looking at a dazzling bright monitor for 8-12 hours every day could "wear out" our retinas over time.
Several studies have already linked blue light from monitors with AMD and that's more than enough for me! Sure, I have f.lux set to disable itself whenever I'm watching movies or using Photoshop or other colour-intensive work so I can enjoy my monitor's full color range when it's not going to be displaying a solid wall of white light... but when it comes to general web browsing and reading screens of black-on-white text, I give my eyes a break and let f.lux wash out most of that high-energy blue light.
Go easy on the blue light from bright monitors and take care of your retinas, people!