Measurement of visual strain in radiologists

Elizabeth A. Krupinski, Adam Johns, Kevin S. Berbaum

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations


We hypothesized that the current practice of radiology produces oculomotor fatigue that reduces diagnostic accuracy. The initial step in testing this hypothesis is to measure visual strain. We are approaching this by measuring visual accommodation of radiologists before and after diagnostic viewing work. We measure accommodation using the WAM-5500 Auto Refkeratometer from Grand Seiko, which collects refractive measurements and pupil diameter measurements. The radiologists focus on a simple target while accommodation is measured. The target distances are varied from near to far starting at 20 cm target distance from the eye to 183 cm. The data are compared for prior to and after long-term diagnostic viewing. Results indicate that we are successfully measuring visual accommodation. Accommodation at long distances does not seem to differ before and after diagnostic reading. Accommodation at near distances however does differ, with decreased ability to accommodate after many hours of diagnostic reading. Since near distances are crucial during diagnostic reading, this could have a substantial impact on diagnostic accuracy (the next phase of the project).

Original languageEnglish (US)
Title of host publicationMedical Imaging 2008 - Image Perception, Observer Performance, and Technology Assessment
StatePublished - Jun 18 2008
EventMedical Imaging 2008 - Image Perception, Observer Performance, and Technology Assessment - San Diego, CA, United States
Duration: Feb 20 2008Feb 21 2008

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (Print)1605-7422


OtherMedical Imaging 2008 - Image Perception, Observer Performance, and Technology Assessment
Country/TerritoryUnited States
CitySan Diego, CA


  • Radiologists
  • Target distance
  • Visual accommodation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging


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