The screen should be 18-30 inches from your eyes, or about an arm's length.
- The top of the monitor should be at eye level because the eyes are at their most comfortable position straight ahead but slightly downward.
- The knuckles, wrist, and top of the forearm should form a straight line.
- The elbows should form a 90 degree angle
- Feet should be flat on the floor.
- You should change your sitting position at least every 15 minutes.
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