February 20, 2012 
Do you have headaches, dry, burning eyes, blurred vision and general fatigue of the body, the causing problem may be that you’re spending more than three hours a day looking at a computer screen….
Computer Vision Syndrome (CVS) has very unpleasant symptoms: eye tension, headaches, blurred vision at distance or near, dry and red eyes, pain in the neck and back, doubled vision and sensitivity to light with a feeling of tension and stress.
To prevent this and some additional problems you must have a specialist ophthalmological examination at least once every two years. Because of the extreme fatigue of the eyes, you can experience spasms when focusing on something, a different vision in each eye, astigmatism, farsightedness, nearsightedness, increased sensitivity to light, self-focus, problems with eye coordination, etc.
Setting up the monitor properly and other important factors
Because most people still have no choice but work with the computer, the only thing they can do is use some harm reduction measures. Therefore, be careful to position the monitor properly, lighting, posture and relaxation.
The monitor should be positioned straight in front of you, the view should be a little down – the height of the first line should be 20° below eye level. Select at least 17″ LCD monitors or those with a higher frequency, because they’re more pleasant to the eye. In recent years even LED lighting and LCD screens make work more enjoyable.
Too much light is not the best solution because it can lead to problems with adjusting the eye to the other light levels. Reduce the lighting to match the brightness of the screen. Check the glare of the monitor (filters can help). You’re not supposed to see a reflection of a window or light source.
What is a good sitting position? Let your back be straight, head up, elbows to the body in the level of the keyboard and wrists relaxed. Knees should be in level with your hips.
If it’s possible, your eyes need to rest every 20 minutes. For example, by looking away to some distant object and watch it for 20 seconds. Ten-minute break after every hour will minimize the development of problems with focusing and eye irritation. It is good to have shorter but more frequent breaks, to blink a lot, and sometimes use the eye drops. Regularly cleaning the screen also greatly affects the quality of work and vision so make sure to wipe your screen frequently.
Taken from: www.magazin.hr