Measurement of Visual Strain in Radiologists

Elizabeth A. Krupinski, Kevin S. Berbaum

Research output: Contribution to journalArticlepeer-review

38 Scopus citations


Rationale and Objectives: The authors hypothesized that the current practice of radiology produces oculomotor fatigue that reduces diagnostic accuracy. Materials and Methods: Testing this hypothesis required an ability to measure eyestrain. This capability was developed by measuring the visual accommodation of radiologists before and after diagnostic viewing work using an autorefractor that was capable of making multiple measurements of accommodation per second. Three radiologists and three residents focused on a simple target placed at near to far distances while accommodation was measured. The target distances varied from 20 to 183 cm from the eye. The data were collected prior to and after a day of digital diagnostic viewing. Results: The results indicated that accommodation at near distances was significantly worse overall compared to far distances and was significantly worse after a day of digital reading at all distances. Conclusions: Because diagnostic image interpretation is performed at near viewing distances, this inability to maintain focus on an image could affect diagnostic accuracy. As expected, younger residents had better accommodative accuracy than older radiologists.

Original languageEnglish (US)
Pages (from-to)947-950
Number of pages4
JournalAcademic radiology
Issue number8
StatePublished - Aug 2009


  • Visual accommodation
  • radiologists
  • target distance

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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