Computer vision syndrome (CVS) is a temporary condition resulting from focusing the eyes on a computer display for protracted, uninterrupted periods of time. Some symptoms of CVS include headaches, blurred vision, neck pain, redness in the eyes, fatigue, eye strain, dry eyes, irritated eyes, double vision, polyopia, and difficulty refocusing the eyes. These symptoms can be further aggravated by improper lighting conditions (i.e. glare [1] or bright overhead lighting) or air moving past the eyes (e.g. overhead vents, direct air from a fan).
Prevalence
According to the National Institute of Occupational Safety and Health, computer vision syndrome affects some 90% of the people who spend three hours or more a day at a computer.[2]
[edit]Therapy
Dry eye is a major symptom that is targeted in the therapy of CVS. The use of over-the-counter artificial-tear solutions can reduce the effects of dry eye in CVS.
Asthenopic symptoms in the eye are responsible for much of the morbidity in CVS. Proper rest to the eye and its muscles is recommended to relieve the associated eye strain. Various catch-phrases have been used to spread awareness about giving rest to the eyes while working on computers. A routinely recommended approach is to consciously blink the eyes every now and then (this helps replenish the tear film) and to look out the window to a distant object or to the sky—doing so provides rest to the ciliary muscles. One of the catch phrases is the “20-20-20 rule”:[citation needed] every 20 mins, focus the eyes on an object 20 feet (6 meters) away for 20 seconds. This basically gives a convenient distance and timeframe for a person to follow the advice from the optometrist and ophthalmologist. Otherwise, the patient is advised to close his/her eyes (which has a similar effect) for 20 seconds, at least every half hour.
Decreased focusing capability is mitigated by wearing a small plus-powered (+1.00 to +1.50) over-the-counter pair of eyeglasses. Wearing these eyeglasses helps such patients regain their ability to focus on near objects. People who are engaged in other occupations—such as tailors engaged in embroidery—can experience similar symptoms and can be helped by these glasses. A Pacific University research study of 36 participants found significant differences in irritation or burning of the eyes, tearing, or watery eyes, dry eyes, and tired eyes, that were each improved by filtering lenses versus placebo lenses.[3]
Further causes of blurred vision can be eye infections, inflammation, or injury. Floaters are tiny particles drifting across the eye and although often brief and harmless, they may be a sign of retinal detachment. Retinal detachment with symptoms that include floaters, flashes of light across your visual field, or a sensation of a shade or curtain hanging on one side of your visual field could also cause blurred vision. Optic neuritis is inflammation of the optic nerve from infection or multiple sclerosis, so you may experience pain when moving your eye or touching it through the eyelid. -:^`
Bye for now
<http://caramoan.ph
Symptom assessment is a key component of dry eye diagnosis – to the extent that many believe dry eye syndrome to be a symptom-based disease. Several questionnaires have been developed to determine a score that would allow for dry eye diagnosis. The McMonnies & Ho dry eye questionnaire is often used in clinical studies of dry eyes. It has 14 questions, resulting in a score from 0 to 45. Scores above 14.5 are consistent with dry eyes. ‘.;*
Newly released article from our web portal http://www.calaguastourpackage.comdq Palmer Maenpaa
But sometimes eye fatigue is a sign of an underlying condition that may need medical treatment. If eye fatigue persists despite taking simple precautions, see your doctor. This is especially important if your eye fatigue is associated with headaches or with eye -,`..
Kind thoughts http://healthmedicinebook.com