Understanding and preventing computer vision syndrome

  • KY Loh
  • SC Reddy
Keywords: Computer vision syndrome, ocular strain, ergonomics, prevention


The invention of computer and advancement in information technology has revolutionized and benefited the society but atthe same time has caused symptoms related to its usage such as ocular sprain, irritation, redness, dryness, blurred visionand double vision. This cluster of symptoms is known as computer vision syndrome which is characterized by the visualsymptoms which result from interaction with computer display or its environment. Three major mechanisms that lead tocomputer vision syndrome are extraocular mechanism, accommodative mechanism and ocular surface mechanism. Thevisual effects of the computer such as brightness, resolution, glare and quality all are known factors that contribute tocomputer vision syndrome. Prevention is the most important strategy in managing computer vision syndrome. Modificationin the ergonomics of the working environment, patient education and proper eye care are crucial in managing computervision syndrome.


Griffiths KL, Mackey MG, Adamson BJ. The impact of a computerized work environment on professional occupational groups and behavioural and physiological risk factors for musculoskeletal symptoms: a literature review. J Occup Rehabil. 2007;17(4):743-65.

Collin MJ, Brown B, Bowman KJ. Visual discomfort and VDTs. National Occupational Health and Safety Commission (Worksafe, Australia). 1988;1-37.

10,000 Malaysians injured annually thanks to computer use. Kuala Lumpur: Bernama. 5 Feb 2006. http://www.lowyat.net/v2/latest/10-000-malaysians-injured-annually-thanks-tocomputer-use.html.

Computer vision syndrome (CVS). American Optometric Association. http://www.aoa.org/x5374.xml.

Bergqvist UO, Knave BG. Eye discomfort and work with visual display terminals. Scand J Work Environ Health.1994; 20(1):27-33.

Blehm C, Vishnu S, Khattak A, et al. Computer vision syndrome: a review. Surv Ophthalmol. 2005;50(3):253-6.

Collins MJ, Brown B, Bowman KJ, Carkeet A. Symptoms associated with VDT use. Clin Exp Optom. 1990;73:111-18.

Rosner M, Belkin M. Video display units and visual function. Survey Ophthal. 1989;33(6):515-22.

Briggs R. Safety and health effects of visual display terminals. In: GD Clayton and FE Clayton (eds). Patty’s Industrial Hygiene and Toxicology, Fourth Edition, Vol. 1, John Wiley & Sons, Inc., 1991.

The Effects of Video Display Terminal Use on Eye Health and Vision. American Optometric Association. http://www.aoa.org/x5380.xml.

Yaginuma Y, Yamada H, Nagai H. Study of the relationship between lacrimation and blink in VDT work. Ergonomics. 1990;33(6):799-809.

Weiss MM, Petersen RC. Electromagnetic radiation emitted from video computer terminals. Am Ind Hyg Assoc J. 1979;40(4):300-9.

Nair I, Zhang J. Distinguishability of the video display terminal (VDT) as a source of magnetic field exposure. Am J Ind Med. 1995;28(1):23-39.

Werner J, Peterzell D, Scheetz AJ. Light, vision and aging. Optom Vis Sci. 1990;67(3):214-29.

Jaschinski-Kruza W. Eyestrain in VDU users: viewing distance and the resting position of ocular muscles. Hum Factors. 1991;33(1):69-83.

Sheedy JE. The bottom line on fixing computer-related vision and eye problems. J Am Optom Assoc. 1996;67(9):512-17.

How to Cite
LohK., & ReddyS. (2008). Understanding and preventing computer vision syndrome. Malaysian Family Physician, 3(3), 3. Retrieved from https://www.e-mfp.org/ojs3/index.php/MFP/article/view/315
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