1. http://www.aoa.org/patients-and-public/caring-for-your-vision/protecting-your-vision/computer-vision-syndrome.
2. http://www.thevisioncouncil.org/content/digital-eye-strain/kids.
3. V.J. Rideout, U.G. Foehr, D.F. Roberts, Generation M2: Media in the Lives of 8–18 Year-olds, Kaiser Family Foundation, January 2010.
4. http://www.medibank.com.au/bemagazine/images/medibank-health-check-screen-time.pdf.
5. An investigation of health complaints and job stress in video display operations;Smith;Hum. Factors,1981