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Related Experiment Videos

Comparing methods of quantifying diplopia.

Sarah R Hatt1, David A Leske, Jonathan M Holmes

  • 1Department of Ophthalmology, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, USA.

Ophthalmology
|May 22, 2007
PubMed
Summary
This summary is machine-generated.

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The cervical range of motion (CROM) method and Goldmann perimeter offer comparable diplopia quantification in strabismus patients. CROM may better reflect real-world diplopia severity, especially for distance-only deviations.

Area of Science:

  • Ophthalmology
  • Strabismus Management
  • Vision Science

Background:

  • Diplopia quantification is crucial for assessing strabismus severity and surgical outcomes.
  • The cervical range of motion (CROM) method is a proposed low-cost alternative to the Goldmann perimeter for diplopia measurement.

Purpose of the Study:

  • To compare the accuracy of the CROM method and Goldmann perimeter in quantifying diplopia.
  • To identify the advantages and disadvantages of each method.

Main Methods:

  • A cohort study involving 76 patients with binocular diplopia due to strabismus.
  • Diplopia was assessed using both CROM and Goldmann perimeter methods, with scores ranging from 0 to 100.
  • Agreement was measured using the kappa test, and reasons for discrepancies >20 points were analyzed.

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Main Results:

  • Good overall agreement was found between the CROM and Goldmann methods (ICC = 0.65).
  • Discrepancies >20 points occurred in 36% of cases, with the Goldmann method often overestimating diplopia.
  • Reasons for discrepancies included fusion/suppression abilities and deviations present only at distance.

Conclusions:

  • The CROM and Goldmann methods generally provide equivalent diplopia severity measures.
  • The Goldmann method may overestimate diplopia in patients with fragile fusion, while underestimating distance-only deviations.
  • The CROM method appears more representative of daily-life diplopia experiences.