Has anyone done a study on the long term effects of a flickering screen on the human eye?
142891
It depends on the individual.  The constant contraction and expansion on the eye is just like focusing on something very close for 10 seconds and then something about 10-20 feet away for 10 seconds and repeating over and over.  This actually strengthens the muscles of the eyes, which has been known to reduce tension headaches, eye soreness/strain, even improve vision.  With the flickering screen, dependant on how fast it is flickering, the eye adjusts the same, the pupil dilating in the dark, and shrinking when exposed to light.  The only thing that may be a caution with this experiment is with people that have or may have epilepsy.  Any flashing lights can lead to a seizure.  But for the most parts, the long term effects are generally mild, temporary spots in vision, soreness if the flickering is too fast (Like overworking an muscle), and strain.  It is recommended to do the exercise I stated above.  It helps out a lot.
691655
these particles are not really present in the light that you see. They are actually the nerves in your eye which are illuminated by the intensity of light. the same effects are not noticed when you look directly at a low intensity light(eg. Tubelight, zero watt bulb etc.)
1044541
Gaming can be very harsh on the eyes! The light from the screen causes a lot of damage to the eyes and it may end up being serious. To avoid more trouble try to limit your gaming time. I know that is hard to do, especially now that it is summer, but to save you vision, I'd calm it down a bit! Go play outside some more! I get Migraine headaches which are a lot like over exposure to iridescent light....you start seeing spots and you get really dizzy and light headed. Then a stomach ache follows along with a POUNDING headache. I lie down for awhile and drink a lot of juice and the spots usually fade away. I also take Tylenol or another form of medicine. I am not sure if this will help you or not, but it is worth a try. Good luck to you and your brother!
60245
use an anti-glare screen. increase ur monitor's refresh rate. keep some natural scenary picture behing ur monitor. see that often. use some frops after consulting ur ophthalmologist if ur eye gets dried often. take rest for eyes every 1 hr.
477648
http://www.seeingwithsound.com/etumble.htm\nhttp://www.howstuffworks.com/artificial-vision.htm\nhttp://www.wired.com/wired/archive/10.09/vision.html
133865
Any type of screen will worsen your eye unless you are careful to give your eyes a break.\nThere are a few tricks you can do to help alleviate problems.\nThe quickest way is to focus on different objects. If you are lucky enough to have an office with a view. Look outside and focus on objects far away every few minutes. (Just enough to focus on for a few seconds to let your eyes 'STRETCH')\nKeep brightness down, too. Staring at a good monitor, you rarely need to crank up the brightness on it to read accurately.\nAbove all. Pay attention to your body. If you start having trouble focusing...or getting headaches, it is time to walk away and get some distance from the cube.
1124923
Good question. Probably not good for you.\n\nI had a groth on my eye for several years that I wouldn't let the doctor surgically remove. Then I got my first computer with a huge Trinitron monitor...Funny thing happened: After 2 months the groth was totally gone. I suspect the radiation from the monitor killed it....That was a GOOD side effect.\n\nBut now I use an LCD monitor, cuz if a regular monitor can do that to the groth I had....Then I'm sure it can do harm as well.
615478
one that i have "seen" is a test for visual acuity using raman scattering of a laser.  \n\nthe scattered dots seem to "move" to an unfocused eye !\n\nalthough it cant be used to quantify visual acuity, it is a quick test if someone needs a vision prescription !
144045
Computers can blur your vision...\n\nSixty million people suffer eye problems due to working on computers, and the number is rising by a million every year.\n\nComputer images are created from thousands of tiny dots – so there is no distinct image for your eye to actually focus on.  You have to focus and refocus to keep the images sharp and after two hours you  end up with the same kind of repetitive stress on your eye muscles as that caused by the keyboard on your wrists.\n\nAll those hours we spend at the computer, straining our eyes, causes a condition known as computer vision syndrome(CVS).  CVS is characterized by eye strain associated with p[prolonged use of computers, with symptoms which include eye fatigue, dryness of the eyes etc.  A number of investigations have indicated that these symptoms occur in 75-90% of computer users.\n\n\nComputer images are created from thousands of tiny dots – so there is no distinct image for your eye to actually focus on.  You have to focus and refocus to keep the images sharp and after two hours you  end up with the same kind of repetitive stress on your eye muscles as that caused by the keyboard on your wrists.\n\n\n\nTips to prevent CVS:\n\n1.Blink frequently to lubricate the eys & prevent dryness – more critical for contact lens wearers.  A conscious effort     should be made to blink frequently.\n2. Take 2-4 minute breaks ever half hour – don’t strain your eyes looking at your computer.\n3. Use anti-glare spectacles preferably with grey tinted lenses, which is a neutral absorber and can filter unwanted effects     of certain colors.\n4. Position the monitor 20-26 inches away from the eyes\n5. Keep the computer screen at your eye level or 5 degrees below the eye level.\n6. Keep the monitor, CPU, keyboard, mouse and other peripherals in easy-to-reach places so as not to strain any other     body parts.\n7. Black characters on a white background are usually best.  Avoid dark back grounds and the size of the text should be     three times the size of  the smallest text you can read.\n8. Arrange light source to minimize glare and reflections on the screen.\n9. Reduce the amount of lighting in the room to match the computer screen.\n10. The use of contact lens re-wetting drops is recommended periodically during the day while using the computer     screen.\n11. Use anti-glare computer screen.\n12. Keep your computer screen free of dust.
21006
it can put extra strain on your eyes trying to look at a screen. but if you have pleny of lights on and can clearly see whats on the screen it should be alright. another thing that could end up hurting your eyes is keeping them open too long while staring. eyes will get overly dry and over time that can lead to more serious eye sight problems. keep good care of your eyes.. there the only ones you got!
169602
I've had relief from short sight (along with astigmatism) and tension in my eyes using ayurveda. Its effects were almost instant. Just a few hours. \nMaybe you wanna check it out.
994451
Ive never really heard about infrared causing any health problems, but at the same time, it is radiation coming from those little things (miniscule if im not mistaken). I think you'll be ok as long as your not like, pointing the remote control at your eye and pressing the button day or night.
835265
Yes, it leads to blindness.  I can only see out of one eye now due to excessive consumption during my youth.  If only Yahoo Answers had existed then!
432829
Yes,it will effect ur eye vision it called CVS. All those hours we spend at the computer, straining our eyes, causes a condition known as Computer Vision Syndrome (CVS). CVS is characterized by eye strain associated with prolonged use of computers, with symptoms which include eye fatigue, dryness of the eyes etc. A number of investigations have indicated that these symptoms occur in 75-90% of computer users.Computer images are created from thousands of tiny dots so there is no distinct image for your eye to actually focus on. You have to focus and refocus to keep the images sharp and after two hours you end up with the same kind of repetitive stress on your eye muscles as that caused by the keyboard on your wrists.Make sure your visit the optometrist regularly to get your eyes tested for Computer Vision Syndrome. He or she may prescribe special glasses and/or an anti-glare screen filter or make other ergonomic recommendations.
596229
Hi there,\n\nThe viewing distance from the screen to the eyes should be seventeen to twenty-six inches. \n\nSome eye relaxation exercises would also help.\n\n:)
1164679
Isolation from actual human to human contact. \nSloppier hand writing\nInability to spell (spell check does it for kids)\nInability to resolve conflict face to face.\nCan cause arguments because people can't "read" the other person's IM, email etc and think that someone is ticked when the other isn't.\n\n\nps: Does the person above me really think she/he is receiving diseases from the minimal amount of radiation from the monitor???? . Is working with computers as harmful as watching TV for long periods of time? How harmful are the radiations from the computer as compared to that caused by TV?\n\nA. Modern computer screens emit very little radiation and are very safe. Issues with regards to eye strain because of computer usage (Computer Vision Syndrome) are mostly due to bad contrast/excessive or poorly illuminated screens / background illuminations / posture / positioning of the monitor and ocular conditions such as dry eyes / allergic conjunctivitis, uncorrected refraction errors esp. astigmatism & convergence insufficiency. \n\n\nIf these aspects are looked at carefully, computer usage & TV viewing, even over long periods, is not harmful. The screens should be flicker free with high refresh rates (Hz). It is also recommended that a few minutes of rest be taken after 30-40 minutes of use.
9738
The medical recommendation is to have at least some low ambient lighting in the background.  This is better for your retina.