December 2002
Volume 43, Issue 13
ARVO Annual Meeting Abstract  |   December 2002
Visual Field Assessment in Conditions of Divided Attention
Author Affiliations & Notes
  • FJ Rowe
    Department of Orthoptics
    University of Liverpool Liverpool United Kingdom
  • PC Knox
    Department of Orthoptics
    University of Liverpool Liverpool United Kingdom
  • AC Fisher
    Department of Clinical Engineering
    University of Liverpool Liverpool United Kingdom
  • Footnotes
    Commercial Relationships    F.J. Rowe, Carl Zeiss Ltd. F; P.C. Knox, None; A.C. Fisher, None.
Investigative Ophthalmology & Visual Science December 2002, Vol.43, 4725. doi:
  • Views
  • Share
  • Tools
    • Alerts
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      FJ Rowe, PC Knox, AC Fisher; Visual Field Assessment in Conditions of Divided Attention . Invest. Ophthalmol. Vis. Sci. 2002;43(13):4725.

      Download citation file:

      © ARVO (1962-2015); The Authors (2016-present)

  • Supplements

Abstract: : Purpose: Visual performance is impaired under conditions of divided attention although most standard tests of vision do not take this into account. The aim of this study was to develop a divided attention (DA) version of a standard visual field test. We then compared performance between standard and DA conditions. Methods: Two lasers projected small spots to either the left or right of a standard fixation target in a Humphrey Field Analyzer (Series VI). In DA conditions, in addition to responding to the peripheral targets, subjects responded to asynchronously-presented central laser spots with a second hand-held response button. Manual response time to central targets and the visual field were recorded. The central detection and visual field tests were also run separately, and manual response time and visual field recorded respectively. Ten young subjects (aged 18-35 years) with normal vision and baseline fields were assessed. Results: The mean test time for the standard 30-2 threshold programme increased slightly in DA conditions (8.120.85 vs. 8.480.92 mins, p=0.333). There were no significant differences in the mean threshold values of standard versus modified visual fields. The mean manual response time for the central detection task increased significantly when combined with the visual field threshold programme (344.9849.7 vs. 492.839.49 secs, p=0.005). Conclusion: When visual field and central detection tasks are combined visual fields are not compromised, although the time taken to complete the task increases slightly. It remains to be seen whether this is also the case with a more demanding central task (e.g. a discrimination task). Visual function declines from early middle age accompanied by increased reaction times, general psychomotor slowing and cognitive changes relating to attention. This may lead to a reduced ability to perform two tasks simultaneously. The next stage of this study will be to investigate the effect of divided attention on visual fields in a group of elderly subjects.

Keywords: 624 visual fields • 310 aging: visual performance • 356 clinical (human) or epidemiologic studies: systems/equipment/techniques 

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.