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Related Experiment Videos

Interobserver variability in optical coherence tomography for macular edema.

David J Browning1

  • 1Charlotte Eye, Ear, Nose, and Throat Associates, Charlotte, North Carolina 28210, USA. djbrowning@carolina.rr.com

American Journal of Ophthalmology
|June 9, 2004
PubMed
Summary

Optical coherence tomography (OCT) foveal zone thickness measurements show interobserver variability. However, total macular volume measurements using OCT are comparable between observers, which is crucial for multicenter studies.

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Area of Science:

  • Ophthalmology
  • Medical Imaging

Background:

  • Macular edema is a significant cause of vision loss.
  • Optical coherence tomography (OCT) is a key imaging modality for assessing macular edema.

Purpose of the Study:

  • To evaluate the interobserver variability of OCT measurements in patients with macular edema.
  • To determine if foveal zone thickness and total macular volume measurements are affected by different observers.

Main Methods:

  • A noninterventional case series design was employed.
  • OCT data from 20 eyes of 10 patients were analyzed by two masked observers.
  • Ordinary least products analysis was used to assess interobserver agreement.

Main Results:

  • Foveal zone thickness measurements demonstrated operator dependence.

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  • Significant fixed and proportional bias were identified between the two observers.
  • Total macular volume measurements were found to be independent of the observer.

    • Conclusions:

    • OCT foveal zone thickness measurements are not directly comparable across different observers.
    • OCT total macular volume measurements are directly comparable between observers.
    • Future multicenter studies using pooled OCT data must account for interobserver variability in foveal zone thickness measurements.