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CVS (Computer Vision Syndrom)

Discussion in 'QnA (read only)' started by techiways, Sep 26, 2004.

?

How long do you use The computer / Day?

  1. Just a fraction of minutes

    95.6%
  2. 30 minutes

    0 vote(s)
    0.0%
  3. A hour or Two

    0 vote(s)
    0.0%
  4. 4 - 8 Hours

    0.7%
  5. I'm addicted ! On pc most of the time

    3.6%
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  1. techiways

    techiways New Member

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    Hi to all the Digizens,



    Are you working on your computer for more than three hour's a day?

    Are you facing frequent eye strain?

    If yes, You may be affected by CVS!

    To create awareness among all the Digizens, Short - Fledged information aboue CVS is posted on the below reply. Let me know your comments / experiences !!!
     
  2. OP
    OP
    techiways

    techiways New Member

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    All about CVS!

    Below are some of the information about CVS i have had cross!!! Contributed on the interest of all the Digizens!!!


    Who Is Affected by Computer Vision Syndrome?
    More than 143 million Americans work on a computer each day, with 88% of them suffering from computer eyestrain, according to estimates. In addition, nearly 54 million children work at a computer each day either at home or in school.* Prolonged computer use can stress a child's eyes and impact his or her vision development.

    What Are the Symptoms of CVS?
    If you or your child spend more than two hours each day in front of a computer screen, you likely experience some degree of computer vision syndrome. CVS includes:

    Headaches
    Loss of focus
    Burning/tired eyes
    Double/blurred vision
    Neck and shoulder pains
    What Causes Computer Vision Syndrome?
    CVS is caused by our eyes and brain reacting differently to characters on the screen than they do to printed characters. Our eyes have little problem focusing on most printed material, which is characterized by dense black characters with well-defined edges. Healthy eyes can easily maintain focus on the printed page. Characters on a computer screen, however, don't have this contrast or well-defined edges. These characters (pixels) are brightest at the center and diminish in intensity toward their edges. This makes it very difficult for our eyes to maintain focus and remain fixed onto these images. Instead our eyes drift out to a point called the "resting point of accommodation" or RPA.

    Our eyes involuntarily move to the RPA, and then strain to regain focus on the screen. This continuous flexing of the eyes' focusing muscles creates fatigue and the burning, tired-eyes feeling that is so common after long hours at the computer.

    What Can I Do About It?
    The solution is simple: see an eyecare professional that specializes in computer vision care. In most cases, standard reading glasses or over-the-counter readers are not accurate enough, because viewing a computer is usually at a different distance (18"-28") than reading distance (16"-21"). Once an eye doctor accurately diagnoses your computer vision problem and determines your correct computer working distances, it's a simple matter to prescribe computer eyeglasses that will allow you to work comfortably and productively. To find an eye doctor who specializes in computer vision care, use Vision Council of America's online locator.

    Also, please read about studies that show computer eyewear can increase computer worker productivity significantly, with cost savings for employers who provide the eyewear.

    Will Glare Screens Prevent CVS?
    Glare screen filters may help somewhat, but they will not solve your computer vision problems because they only affect glare from the computer screen — not the visual problems related to the constant refocusing of your eyes when working at a computer.

    Only when your eyes can focus clearly at the plane of proper distance on the computer screen can they experience relief from the fatiguing effects of CVS. An anti-reflective coating (AR) is also highly recommended on all computer eyeglasses. An AR coating prevents glare and reflections on the front and the back of the lenses that would interfere with focusing on the screen. Read more about minimizing glare.

    Will Computer Eyeglasses Make the Screen Clearer?
    Yes, because they will eliminate the constant refocusing effort that your eyes go through when viewing the screen. It has also been proven clinically that having the correct prescription in computer eyeglasses increases productivity and accuracy.

    Do Computer Eyeglasses Look Like Safety Glasses?
    No. Almost any style of frame can be used for computer eyewear. More important are the lenses that your eye doctor chooses for your computer eyeglasses. Ninety percent of the time, multifocal lenses will be your best choice, as they are designed specifically for working at a computer. They allow you to see clearly at your correct computer screen distance and can give you some distance vision beyond the computer. But whether the lenses are multifocal or single vision, you and your eye doctor must determine the best lenses for your work environment.

    What About the Tints I've Heard of for Computer Lenses?
    If you work in a brightly lit office, you may benefit from a light tint applied to your computer lenses. This can cut the amount of light that reaches your eyes and provide relief in some cases. But tints and filters don't address the underlying cause of computer eyestrain.

    Does Every Computer User Need Computer Glasses?
    More than 70% of computer users need computer eyeglasses.** In fact, according to a study out of the University of California, Berkeley, 25%-30% of children would benefit from computer eyewear.

    If I Don't Have Symptoms of CVS,
    Do I Still Need Computer Eyewear?
    Maybe. According to a University of Alabama study (2004), computer users who are not experiencing symptoms of computer vision syndrome may also need computer eyewear. The study reports that it does not matter whether subjects reported symptoms of CVS. The fact is that viewing a computer screen is a different stimulus for the eyes than reading printed materials. It is much more difficult for the eyes to focus on pixels than on printed characters. Individuals with no visual problems may still be losing productivity and accuracy at the computer. This is the number one reason to get a regular eye exam from a computer vision specialist.

    Will Insurance Pay for These Glasses?
    In some cases it will. If you have medical coverage, but not vision, the exam portion of the cost may be covered by your medical carrier. If you have vision insurance, you may be entitled to an annual exam, which could be used to cover the computer exam and a portion of the cost of the computer eyewear. A few progressive companies are already providing exams and eyewear for their employees who work at computers.

    Will My Reading Glasses Work at the Computer?
    Not necessarily. As with anything else you do in life, it is important to have the right tool for the job. You would not use a hammer when you need a screwdriver. The same goes for your vision: you would not use distance glasses for doing close work. So in most cases your reading glasses are probably not going to do the job. The correct computer eyeglasses will optimize your comfort and productivity at the computer screen while also allowing you to read and see out at some determined distance (10-13 feet). Reading glasses are usually prescribed to read at a distance of 16"-18", but computer glasses are usually designed to work at 18" to 28".

    Is It True That if a Person Doesn't See the Computer
    Screen Clearly, He May Not Be as Productive?
    Yes, but in cases where the correction is only slightly off, the computer user may think he is seeing the screen clearly. Yet a recent study at the University of Alabama found that over time even the smallest miscorrections can cause big problems down the road, including loss of productivity and accuracy in the workplace. The eyes viewing a computer for many hours a day is analogous to the eye muscles being forced to do push-ups for hours and hours. Over time, these push-ups will significantly affect productivity, accuracy, and comfort.

    Isn't Ergonomics the Solution to Computer Eyestrain?
    Ergonomics is important — changing one's computer workstation can certainly help to minimize other physical symptoms. But ergonomics cannot fix a visual problem. The proper prescription computer eyeglasses at the proper computer distance (18" to 28") is most important. This can be done only with the right computer lens prescription.

    Is It True That Wearing Computer
    Eyeglasses Will Make My Eyes Worse?
    This is not true. In fact, prescription eyeglasses can prevent further damage to the eyes. Depending on your prescription, an eyecare professional will probably fit you in either single vision or multifocal lenses. The single vision lens is designed to optimize your vision at one distance only: near for reading or work at the computer; or far for distance (watching a movie or driving). Many eyecare professionals are now fitting computer users in a multifocal lens that has a wide intermediate zone, which optimizes computer work. This lens also allows the wearer to read printed material while working at the computer and see a limited distance (10 to 13 feet). It is true that your eyes will get worse if you continue to stress the eye muscles and do not wear prescription eyeglasses.

    Sources:
    *U.S. Census, 2001
    **American Optometric Association, 1998
     
  3. ShekharPalash

    ShekharPalash Web Entrepreneur

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    I voted for 4-8 Hours....

    But I do 5-6-7-8 hours every day... depends on work/load/project/pending stuff...

    Nice CVS info u provided... thnx ;-)

    Waise abhi tak mujhko "Chasma" nahi laga hai... but eyes mein thodi strain hoti hai aajkal...

    Gotta take care now ;-)
     
  4. medpal

    medpal Medic on Call!!

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    hi techieways,

    welcome to the forums,

    yes now a days cvs is more of a professional hazard but still it is more seen in gamers, and call centre workers more than routine office workers.

    why so because more and more people are now shifting towards the lcd monitors which cause much less strains to your eyes than cvt ones.

    in addition to constant refocusing when we see the bright object our nervous system gets activated contracts iris to reduce amount the light entering the eyes and with too much attention given to details on the screen we forget to blink our eyes that dries out the outer layer thats why this cvs.

    i do not think the multifocal glasses are still widely available in india and if available in bigger cities it may cost a bomb.

    here is my suggestion to prevent computer related probs.
    -- after a while say 5-6 mins of viewing the monitor look at a distant object (about 10 - 12 feet away the object should of calm colours) best would be to look outside the window for a while which readjusts the eyes working portion. will almost wipe out the eye strain, tears, dry eyes.

    -- the same techniques also help in reducing the headaches which are due to stimulation by the bright light and called vascular headaches.

    -- if possible use the computer anti glare screens made by reputed firms like 3m (do not use crap local ones costing just a little) they enhance the contrast between different colours and enhance the readability.

    -- keep a distance of atleast 2 feet to your monitor.

    -- position mouse and key pad as such that your wrist gets rest while operating them so you prevent the hand pains which is called carpal tunnel syndrome(this is imortant for the long types) who need to type a lot.

    -- do stand up from the chair after an hour long session for two minutes stretch your hands and legs and body this will reallign the bloodflow.

    -- keep a good back rest chair as your computer chair (please do not use home easy chair

    -- keep your monitors top border at your eyes levels not higher not lower it will help your neck stay relaxed.

    i hope i have solved many peoples queries.

    @techiways
    i would like to have the direct links to those studies which you have quoted.

    this studies are meant for the medical people and using data by unqualified persons can be dangerous as it carries a lot of misinterpretations.

    btw i am a doctor so the request for link is justified.
     
  5. OP
    OP
    techiways

    techiways New Member

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    re

    Hi,

    Thanks for the welcome.

    The link you requested is below

    http://www.allaboutvision.com/cvs

    Actually i'm in a hurry now. I shall reply in brief in my next post. Btw your explanation for cvs is cool!

    Catch ya soon
     
  6. #/bin/sh

    #/bin/sh New Member

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    10-11 + hrs
     
  7. FunkyB

    FunkyB New Member

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    10 hrs a day in office...and then anything between 2 to 4 hrs at home at night...lol...just cant do nothin else. read a book at times...usually before bed...weekends r light though coz no office ;) thanx for the info mate...
     
  8. subha

    subha New Member

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    Hi All,
    I hope most of them are computer professionals in some IT concerns. I would like to know if there are any Vision Care departments with Optometrists in your IT concern giving Vision therapy for treating Computer Vision Syndrome?

    Thanks & Regards ,
    Subha,
    Optometrist
     
  9. ThinkFree

    ThinkFree New Member

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    ^^It's a four year old thread
     
  10. thewisecrab

    thewisecrab AFK

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    :lol:
    What a bump :D
     
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