Effect of Computer Monitor Distance on Visual Symptoms and Changes in Accommodation and Binocular Vision

Details

• Personal Author:
  Bailey I ; Hoenig P ; Ko P ; Li D ; Rempel D
• Description:
  Visual symptoms are the most common complaints associated with prolonged computer use. We investigated effects of accommodation and vergence demands specified by the computer monitor viewing distance on the development of visual symptoms and visual function changes. Ten 18-35 year-old subjects performed a two-hour, visually demanding, text-viewing task at three viewing distances over three days. The visual angle of the character size was held constant. We measured changes in several static and dynamic properties of accommodation and binocular vision before and for 90 minutes after the viewing task. The 100 cm viewing distance induced less lead effect for accommodation to a distant target and less lag retention for accommodation to a near target. On the other hand, the viewing distance of 33 cm introduced less eye irritation or tearing symptoms and a higher overall dynamic convergence response compared to longer viewing distances. There were weak associations between changes in binocular functions and visual symptoms. While the symptoms were influenced by the viewing distance, they cannot be fully explained by the changes in the visual functions measured here. [Description provided by NIOSH]
• Subjects:
  Computers Eye Occupational Health Safety Sense Organs Sense Organs / Injuries Vision Disorders
• Keywords:
  Computer Equipment Eye Function Tests Eye Strain Vision Disorders Visual Motor Performance Visual Perception
• ISBN:
  9780945289364
• ISSN:
  1071-1813
• Publisher:
  Human Factors and Ergonomics Society
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Proceedings
• Place as Subject:
  California ; OSHA Region 6 ; OSHA Region 9 ; Texas
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  53
• Issue:
  18
• NIOSHTIC Number:
  nn:20058530
• Citation:
  Proceedings of the Human Factors and Ergonomics Society 53rd Annual Meeting, October 19-23, 2009, San Antonio, Texas. Santa Monica, CA: Human Factors and Ergonomics Society, 2009 Oct; 53(18):1447-1451
• Federal Fiscal Year:
  2010
• Performing Organization:
  University of California Los Angeles
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Proceedings of the Human Factors and Ergonomics Society 53rd Annual Meeting, October 19-23, 2009, San Antonio, Texas
• End Date:
  20270630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:cb17a4716d8e18c57c760c0b541cfeabe6b402bd8e2b224facd4653bf923d42c6a5475c8fe097154540480ad664afa780296fc1efed21f406c4e68c4e065e1c6
• Download URL:
  https://stacks.cdc.gov/view/cdc/221605/cdc_221605_DS1.pdf
• File Type:
  [PDF - 272.64 KB ]