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Related Experiment Videos

Repeatability of the C-100 colour vision test.

Jeffery K Hovis1

  • 1School of Optometry, University of Waterloo, Waterloo, Ontario, Canada.

Clinical & Experimental Optometry
|May 28, 2003
PubMed
Summary

The C-100 color vision test demonstrates high repeatability in distinguishing between protan and deutan red-green color vision defects. Minor classification errors were more likely to mislabel protan defects as deutan.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • The C-100 color vision test is recognized for its diagnostic validity in red-green defects.
  • Limited data exists regarding the repeatability of the C-100 test.

Purpose of the Study:

  • To evaluate the repeatability of the C-100 test.
  • To assess its reliability in classifying red-green color vision defects as protan or deutan.

Main Methods:

  • The C-100 test was administered twice to 58 individuals with congenital red-green color vision defects.
  • Testing sessions were spaced at least 10 days apart.

Main Results:

  • The C-100 test exhibited high repeatability, achieving a kappa coefficient of 0.96 for diagnostic agreement.
  • The few observed discrepancies involved misclassifying protan defects as deutan.

Conclusions:

  • The C-100 test is highly reliable for differentiating protan and deutan color vision defects.
  • When errors occur, protan defects are more frequently misidentified as deutan defects.

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