This can be caused from staring at a computer screen for long periods of time or by switching from paper to screen. one can reduce eye strain by employing?document holders at his or her workstation to reduce eye movement from paper to screen
Ergostoreonline (A Division of Ergonomic Resources), Ergonomics Dictionary and Glossary North Carolina, USA 2014. http://www.ergostoreonline.com/ergonomics-dictiona ry.aspx, (Ergo - Amer) {744}