the outer edge of each character

The relationship between the eyes and the computer screen, in today's high-tech world, become a topic of concern in the medical field. Studies have found that, up to 70% of the world's computer workers experience, computer vision syndrome, or CVS.
Unfortunately, the computer vision syndrome is not limited to the adult population. Many children who with their school and in the family computer. Children's computer time may cause the same vision stresses experienced by adults. CVS children can have a profound effect, duration on the progress of their normal visual acuity.
Computer vision syndrome symptoms usually appear in computer work, for 2 or more hours. Headache, around the focus, water or itchy eyes, diplopia, blurred vision is the most common symptom. Other symptoms may also occur, even including the muscle and joint pain, especially the shoulder and neck.
It is difficult to focus
The results of CVS in the computer screen to eye effect. Character eyes not read and process in the computer screen printing materials, their processing in the same way. The edge of a character printing clear, high contrast levels, it is easy to make the eyes focus.
Even in the computer screen character definition. The bright spot in the middle of the outer edge of each character are fading. As the images faded, our eyes wandered characters and have difficulty finding a focus. We had to force our eyes, focused, to create a strain.
Reading printed, eyes will automatically discover RP, the rest of the accommodation point. Once this point is determined, the eyes can read comfortably. The eyes have difficulty relaxing RP, on a computer screen. Eyes wander, the focus must be forced back. This is the cause of eye strain and CVS.