Is true blue blockers, but for "PC and TV" really unnecessary?

I was looking for a "real" blue-blocker to make my body clock vorzusteuern (in preparation for a long trip) something. Because the blue components in the sunlight are one of the environmental factors controlling the circadian clock in humans.

~~~ (Outdoor) ~~~
At another popular application in the snow Sport / Water / mountain sports is the contrast enhancement and eye protection. Especially outdoor junkies otherwise you could get an eye injury already in middle age, at least in the English Outdoor expert Bear Grylls has (of many extreme locations, including extremely bright places such as deserts or ice regions, a TV series "released into the wild "had turned) even revealed that he has already won a first eye damage (since he is also often seen with such orange glasses). Only since I was busy with something blue blockers, it occurred to me now also in reports on missions in desert regions (like Afghanistan) on. Whereas one there sees no "classic" (dark gray) eyes filter in use. So Must be something to be tuned to this blue blockers. There has probably over vital sense that one any time operations in the shade have noticed (building entrances, car occupants, bushes, ...), which would be hampered by dark sunglasses (by eye-squinting at very lack of protection or). Presumably allow Blue blockers to the eye to perceive a greater dynamic range (juxtaposition of objects in the glaring light and shadow) simultaneously.

~~~ (For PC or TV?) ~~~
Whether you really need a blue blocker for computer / TV, I doubt more, because you can adjust the brightness to the environment but simply, and (at least on PC) usually adjust the screen color reproduction so that blue components are greatly reduced (enough) , For monitors, this is the monitor's menu; Laptops with the user interface has the graphics card driver possibly similar ways, otherwise 7 in Windows: Control Panel> Display> Calibrate color. However, apparently with the Windows-calibration of the blue component only be reduced (not so as to be completely suppressed at my monitor), but what should be sufficiently well, if you are not eye hypochondriac?

~~~ (Functional principle) ~~~
Unlike other "just as" orange-colored glasses (fun glasses, hippie-style sunglasses, "color therapy" goggles) is, in true blue light protectors like this one technically so-called cut-off filter, because the filter transition between green and blue is so clear-cut that results in color passage diagrams an edge like steep rise from blue to green passage passage. This blue maximum blocked, green on the other hand already passed its maximum. On cheaper way orange-colored plastic glasses are colored not so clear-cut, so can unwanted still up some blue go through with, and at the same time suppress unnecessary too much of green shares.

The fact that the prism attachment to a real blue blockers (ie not cheap rip-off) is, I was able to confirm in tests. Blue LEDs are virtually black, light green (lime green) LEDs on the other hand not attenuated. When a file folder, which is obviously colored with a single intense blue pigment, the blue disappeared completely! (He appeared through the glasses completely slate-black).

~~~ (Alternatives) ~~~
At the optometrist, there are brands that are considerably more expensive, but have a wider range (more different protection levels), or in combination with polarization filters (intended for less glare in water) are available. However, even without polarizing filters like to double the price (eg Eschenbach from about 90 euros), without (apart from the larger selection) a value was evident for me. The prism are in any case also back anti-glare and hardened (lt. To manufacturer).

~~~ (Color perception) ~~~
Of course it is getting used to that everything was white and gray before, now appears in orange. Manufacturers statements that color See stay get is a brazen lie manufacturer. Only red and green remain as such, the rest is colored more or less "sauce" brought to an intense orange-unity. Many so might not get along, and are set by this limitation subconsciously under stress, and put those blue blocker away quickly.
But it depends on the attitude of (whether on the other hand defends itself internally or not). If necessary, they provide Just imagine, a romantic sunset would plunge everything into his gold-orange light;) (so is the color impression that is actually comparable).

~~~ (Traffic safety) ~~~
Blue Blocker this protection levels are officially not allowed behind the wheel. Whether you think this is nonsense and bureaucrats-the temptation to ignore it, is indeed well-control hardly anyone. And it is indeed actually somewhat Security Hinz won (glare, improve visibility, less eye fatigue, or less glare from Xenon headlights). On the other hand blue playing but a safety-relevant role in the perception of blue and white road signs in the blue-silver police car, and in the proverbial blue lights on emergency vehicles. Therefore, you should take the ban behind the wheel rather seriously. Or go for the "Light" version of the spectacle intent. The apparently lets through enough of the "Aral" -like (bright, warm) Blue traffic signs / of the police car.

In addition, a blue-blocker this filter stage promotes the tired-will, because then begins the production of melatonin ("the sleep hormone"). This is useful when traveling for time zone changes, or even for summer travel to the far north, where it is never dark ("white nights"), or because of me perhaps for television into the night (I've tried this, and imagining actually, I will get tired more quickly and bed-ripe). But on the road (and even before the PC) will be as an effect probably rather not have.

You should not exaggerate the use also. If you constantly during the day taken their glasses, and they therefore put their brains permanently melatonin production, which is a healthy wake / sleep Rhyhtmus certainly not good, it might give them to press on their minds until the worst case even a so-called "winter depression" may threaten.