This article is constructed for sensationalism, not information.
Here are some basic facts:
- The human eye is MUCH less sensitive to blue light than it is to green, or even red. We are roughly half as sensitive to red as to green, and roughly half as sensitive to blue as to red (so 1/4 of green sensitivity). Look around at our world (the natural one, not the one we've built) and you should instantly understand why this is true.
- Under normal conditions, the blue light we receive with our eyes is limited by the fact that it is mixed in with other light that we are MUCH more sensitive to; under normal conditions, our natural reflexes will kick in and limit the amount of light we allow into our eyes (ALL light), so blue light specifically is never an issue.
- BECAUSE we are so much less sensitive to blue light than to green, and BECAUSE we normally only ever see significant amounts of blue light from sources that are emitting in other frequency ranges as well, it becomes much easier to overexpose our eyes to blue light, if we are looking at a source that emits ONLY blue light. Note that this same statement applies to sources that emit only red light, but not to the same degree.
- A lot of modern devices have, for some reason, taken to using blue lights as indicators. Since we have reduced sensitivity to blue light, that means the light SOURCE has to be significantly more intense than usual in order for us to SEE the same brightness.
So basically, don't spend all day staring at bright blue lights, and you'll be fine.
If you DO stare at blue lights a lot, think about replacing them with something that is NOT blue, or at least not ONLY blue. Cyan contains green and blue mixed together, is a LOT easier on the eyes, and still serves to get attention. Magenta is not such a good choice since it combines red and blue (the two colors we are least sensitive to), but is still better than pure blue.
Adjust your CRT/Monitor/TV for a normal white level and sane intensity and you should be fine. Also be aware that watching a TV in a fully darkened room may be the popular way to enjoy entertainment, but is an unnatural state and will result in increased eye strain unless the brightness is adjusted accoringly.
For what it's worth, this isn't a new issue. We had the same conversation when color CRTs were first a thing, and when fluorescents were first a thing. If plasma screens had lasted more than a decade and been more than a niche product, we'd've had the same conversation about them.
Now, having said all that, one place that SHOULD be addressed is the blasted "star-in-a-jar" headlights that are on modern cars. If you need headlights that bright to drive at night, take a bleedin' cab. I've got frickin' flash-burn from those things. There's a silhouette of me burned into my seat from the radiation exposure caused by those things! I'm pretty sure they should be licensed as deadly weapons. If there are any beings on the planets of Proxima Centauri, I'm pretty sure they are wondering what the small star in orbit around our sun is, and why it keeps flickering so much!
