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Protecting eyes from computer screen
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What things should you do if using a computer for a long time for Health reasons?
Computer and Health
Computer work can be quite strenuous for the body, especially for the eyes, the back, the wrist and the hand.
The first thing to do is to have a good position in a nice environment: comfortable straight chair, monitor and keyboard at the right height and distance, quite room, well lit.
There are several ways to minimise eye strain. Modern flat screens are better than standard monitors. Also, special screen filters that fit in front of a monitor are good for the eyes.
Also, you may have heard of RSI, repetitive strain injury, a condition that affects the wrist and the hand and is provoked or compounded by extensive use of the mouse. A few things can help minimising the risk of this are: trying to use more keyboard shortcuts, moving the hand away from the mouse when not needed etc.
The most important thing is to take regular short breaks away from the screen and to do some stretching or get some fresh air in order to relax the mind and the body. But don't use that information to walk out in the middle of your next ICT lesson.
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FAQs on Myopia
Q. What is myopia?
A. Myopia is commonly known as "short-sightedness". A person with myopia is able to see close objects clearly but objects that are further away will appear blurred.
When the normal eye looks at an object, light rays from the object enter our eye. These light rays are bent at the cornea and the eye lens before forming an image on the inner layer of the eye called the retina. This image is then transmitted by nerve signals to the brain. The brain interprets these signals so that we see the object.
If the light rays are focused directly on the retina, we see a sharp image. Myopia occurs when the light rays from distant objects are focused in front of the retina instead of on it, resulting in blurred images on the retina. This is usually because the eyeball is too long or sometimes the cornea and lens do not bend the light rays properly.
Q. What are the complications of myopia?
A. Undetected myopia before the age of 6 years old can lead to amblyopia (lazy eye) and eventually blindness in the affected eye.
Severe myopia can lead to potentially blinding conditions such as _ retinal detachment (a condition when the retina separates from the eyeball)
Your health - Headaches and eye strain
What are headaches and eyestrain?
Headaches can be caused by many different factors and are one of the most common reasons people visit their GP. Most headaches are not serious and usually disappear on their own. They can be relieved by mild painkillers, or a positive change in lifestyle.
Eyestrain is also a common complaint among people doing 'close' work e.g. those who work using computer monitors. Eyestrain can be a trigger for headaches, but can usually be avoided by following simple guidelines.
What are the signs of headache or eyestrain?
A headache can range from a mild, throbbing feeling to a sharp, stabbing pain. Headaches can affect your whole head or just a part of it. The pain may move around, affect your vision or even cause nausea and vomiting. The two most common types of headache are tension headaches and migraine.
Tension headaches do not usually last for a long time. Common symptoms of a tension headache include
Eye Discomfort in the Office
What is the significance of "good" lighting? Office work is visually demanding and has always required good lighting for maximum comfort and productivity. "Good" lighting means providing enough illumination so that people can see printed, handwritten or displayed documents clearly but are not blinded by excessively high light levels (a cause of glare). The introduction of computers in the 1970's increased the visual demands of office work and made lighting design even more challenging. While typewriters were being exchanged for computers, the need for redesigning or rearranging office lighting was commonly overlooked.
What are signs of poor lighting? The most common complaints resulting from poor lighting are: eyestrain, eye irritation, blurred vision, dry burning eyes, and headaches. Poor lighting affects not only the ocular system but can also contribute to stiff necks and aches in shoulder area. These problems can occur when people adopt poor or awkward postures when trying to read something under poor lighting conditions.
Vision / Eye Strain
Visual problems, such as eyestrain and irritation, are among
the most frequently reported complaints by computer operators. These
visual symptoms can result from improper lighting, glare from the
screen, poor positioning of the screen itself, or copy material that is
difficult to read. These problems usually can be corrected by adjusting
the physical and environmental setting where the computer users work.
For example, work stations and lighting can and should be arranged to
avoid direct and reflected glare anywhere in the field of sight, from
the display screen, or surrounding surfaces.
You also can reduce eyestrain by taking vision breaks, which
may include exercises to relax eye muscles after each hour or so of
operating a computer. Changing focus is another way to give eye muscles
a chance to relax. You only need to glance across the room, or out the
window, from time to time and look at an object at least 20 feet away.
Other eye exercises may include rolling or blinking the eyes, or
closing them tightly for a few seconds.
Computer eye strain
Very few jobs today do not require long periods of time in front of a computer. The great irony of course is that the human body is not designed to accommodate all the hours spent in front of a computer, and so we often end up with backaches, headaches, sore eyes and wrists, and a few extra kilograms. It is therefore important to manage your health through workstation planning and good work habits.
Your eyes and the computer.
Staring at a screen for long hours places immense stress on your eyes because they were not designed to work at such a close range for long periods of time. Furthermore, the constant shift in focus (between the screen, documents and the keyboard) only makes matters worse and eventually you end up with a condition called eye strain.
Eye strain is an umbrella term for a wide range of symptoms including:
Headaches, Tired, sore eyes, Eye irritation, Blurred vision
