1. make the eyes before the work related to the computer and make eye repeat periodically. 2. the lighting should get advice from a doctor before work with computer. 3. should the change of posture or stretching it periodically, it should not work with the computer continuously for a long period too. 4. lighting the display screen (Monitor), there should be appropriate or is not saengkra should be flashing and flaring should have brightness or intensity of the light that is not appropriate, should adjust to bright or too dark. 5. the distance from the eyes came to the computer screen should be around 20 degrees pitch bending angle 18-22 inch. 6. position the hand elbow keyboard should be perpendicular to the torso (approx. 90-120 degrees) for reducing lift at the shoulders. 7. grip the Mouse should not twist your wrists are positioned tilted outward, torso. The wrist should be in a handle, tilt or twist the least. 8. the Chair should be able to adjust the height of the body, and the user must have an adjustable backrest and movable armrests seat section should resemble the curved ramp down. Not a and not the press, under the position of the knee. 9. display must be able to adjust the tilt angle. 10. If the muscle pain or chronic ligament Should consult a doctor. At key All work for 2 consecutive hours should rest for about 10 minutes.
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