Adopt proper settings
- Adjust brightness, font size and workstation.
A. Eyes should be slightly above the top of the screen and no less than 50 cm from the screen.
B. Sit upright and close to the desk.
C. Forearms should be approximately horizontal and supported by the desk. A space in front of the keyboard to allow hands and wrists to rest when not typing.
D. Keep wrists straight when keying.
E. Position a mouse within easy reach so it can be used with a straight wrist.
F. Legs should have rooms to move under the desk.
G. Choosing a chair with round edge or curved cushion seat can avoid excess pressure from the edge of seat on the backs of legs and knees. A footrest may be helpful.
- 30 – 40 – 50: Keep reading distance no less than 50 cm for computers, 40 cm for tablet PCs and 30 cm for smartphones.