*Using a computer keyboard that is positioned improperly can result in carpal tunnel syndrome. To prevent injury, the user should keep the wrist in a neutral position. That is, the line from the hand to the forearm should be straight. The hand may be slightly lower than the forearm. But the hand should never be higher, and the wrist should not be cocked. The keyboard should be positioned relatively low, keeping the hand slightly lower than the elbow. A wrist pad can be used to support the wrist.

* also the eyes should be straight to the screen and always  sit straight such that the spinal is always straight...

this suggestions are just to be aware of all computer syndrome and lead a happy life....