Weird phenomena with my eyes!! - Page 1
Forum section: electronics / general

author: Mo3tasm
author_rank: Contributor
timestamp: March 04, 2017, 07:36:12 pm
content: Hello everyone,Almost every time I work with electronic/electric circuits and get myself exposed to electricity (even low voltage/current), and I start looking to my computer screen afterwards, I see white text look cyanish.something like thisafter 10 minutes or so the text will look white as it should.Do any of you experience such a thing? or happen to know why is it so??Thanks..

author: T3sl4co1l
author_rank: Super Contributor
timestamp: March 04, 2017, 08:34:03 pm
content: Is the illumination of your work area on the red side?Tim

author: Benta
author_rank: Super Contributor
timestamp: March 04, 2017, 09:30:26 pm
content: You need to look at your workplace illumination.If your eyes are subjected to a non-white or discontinuous light spectrum, they (and your brain) try to compensate.Resetting this compensation takes time, depending on color several minutes.I suspect you have flourescent or LED work lights.Especially cheap LED lamps have a lousy spectrum.Personally, for intense work light, I only use halogen incandescent lamps. They have a wonderful continuous spectrum and will always give true color rendering of what you are working with.A fun experiment: place a bright orange object on a well-illuminated white wall. Stare at the object for a few minutes. Take a stroll, and you'll have that object in your sight all the time, but in green.

author: Halcyon
author_rank: Unknown
timestamp: March 05, 2017, 02:09:11 am
content: It's very similar to theMcCollough effect.But yes, as others have pointed out, good lighting helps greatly. I even use a halogen desk lamp at work just to break up the monotony of flouro lighting.

author: Brumby
author_rank: Unknown
timestamp: March 06, 2017, 03:07:41 am
content: I have CFL illumination using 4000ºK globes, which are a cool white, but not so harsh as ones 6000ºK and above. This not only illuminates my work area - but also the area surrounding my computer monitors. (Having bright monitors with dark surrounds becomes very tiring on the eyes. I've even put a backlight on the rear of my TV to light up the wall behind it a bit when the room light is at a low level.)

author: gnif
author_rank: Unknown
timestamp: March 06, 2017, 03:37:29 am
content: LED Lighting is notorious for this, white LED lights are actuallyUVblue and use white phosphor to turn theUVblue light white.

author: Unknown
author_rank: Unknown
timestamp: March 06, 2017, 04:23:06 am
content: LED lighting is just starting to be accepted for cinematography use, where color rendition matters a lot, although the lights with good output and good spectrum are of course very expensive.This is an interesting writeup that explains a lot of the issues and different technologies in detail:http://www.screenlightandgrip.com/html/LED_Lights.html

author: yuzuha
author_rank: Contributor
timestamp: March 06, 2017, 05:40:48 am
content: some people can see UV after cataract surgery as the plastic used in some of the lenses passes shorter wavelengths than the natural one.Ah Elf... Record of the Lodoss Wars fan? (me too)

author: Dr. Frank
author_rank: Super Contributor
timestamp: March 06, 2017, 08:10:09 am
content: Quote from: gnif on March 06, 2017, 03:37:29 amThat's simply wrong.The chips inside white LEDs in general emit blue light, not UV. (There exist UV LEDs, but these are usually not used for generating white light)Fluorescent tubes generate UV which is transformed into visible light by phosphors.A certain amount of this UV is still visible, so people who are super-sensitive to UV should get rid of those CFLs.Anyhow, this strong blue emission from LEDs might as well cause problems for some people.Frank

author: gnif
author_rank: Unknown
timestamp: March 06, 2017, 08:05:23 pm
content: Quote from: Dr. Frank on March 06, 2017, 08:10:09 amSorry yes, you are dead on, I am not sure what I was thinking when I posted this.

author: hans
author_rank: Super Contributor
timestamp: March 06, 2017, 09:33:30 pm
content: I can grasp a similar effect when I'm watching a youtube video before sleep in bed.I often do that in a dark room with one eye buried in the pillow and the other not.Computer screens emit a lot of blue light. For my PC I installed flux, but not on my phone. One eye will eventually adjust, where the buried one will not.Then after a video, when looking through eye or the other, the blinded eye will perceive light much brighter, but also a bit more orange-ish.The other eye is much less sensitive.A good reason to actually not watch videos before sleeping, or also install flux on your computer. If you have truoble sleeping, it's often said not to be on any computer screen (computer, laptop, tablet, smartphone, television, etc.) a few hours before bedtime.

author: Iwanushka
author_rank: Frequent Contributor
timestamp: March 06, 2017, 09:46:17 pm
content: Glasses with Blue Color filter helps too

author: madires
author_rank: Super Contributor
timestamp: March 06, 2017, 10:03:51 pm
content: Quote from: hans on March 06, 2017, 09:33:30 pmSome LCD screens got a low-blue-light setting (Asus, BenQ, ViewSonic,).