Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Repeatability indices for the Farnsworth D-15 test.

Jeffery K Hovis1, Shankaran Ramaswamy, Matthew Anderson

  • 1School of Optometry, University of Waterloo, Waterloo, Ontario, Canada. jhovis@uwaterloo.ca

Visual Neuroscience
|November 3, 2004
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Concurrent renal amyloid light chain amyloidosis, light chain crystalline podocytopathy and light chain proximal tubulopathy: a case report.

Pathology·2026
Same author

Early Exposure to Infectious Diseases Specialty Among Undergraduate Students With Interest in Healthcare Careers.

Open forum infectious diseases·2026
Same author

Simultaneous treatment of bilateral macular holes using vitrectomy and pneumatic vitreolysis: a novel single-positioning strategy.

Canadian journal of ophthalmology. Journal canadien d'ophtalmologie·2026
Same author

Smooth Muscle Cell Specific Activity of SGK-1 Alters Aortic Stiffness and Abdominal Aortic Aneurysm Growth.

Journal of vascular diseases·2026
Same author

Correction to: Incremental 2D self-labelling for effective 3D medical volume segmentation with minimal annotations.

BMC medical imaging·2026
Same author

Incremental 2D self-labelling for effective 3D medical volume segmentation with minimal annotations.

BMC medical imaging·2025

The D-15 color-vision test shows good repeatability in individuals with red-green color vision defects. Re-testing is recommended if fewer than five crossings are made to ensure reliable results.

Area of Science:

  • Ophthalmology
  • Optometry
  • Genetics

Background:

  • The D-15 test is widely used for color vision assessment.
  • Previous repeatability studies often included a high proportion of color-normal individuals, potentially biasing results.
  • Color-normal subjects rarely fail the D-15 test, limiting its relevance for clinical populations.

Purpose of the Study:

  • To determine the repeatability of the D-15 color-vision test in a clinically relevant population.
  • To assess the D-15 test's reliability specifically for individuals with congenital red-green color vision defects.

Main Methods:

  • Examined D-15 test results from two separate sessions for 116 subjects with congenital red-green color vision defects.
  • Calculated the kappa coefficient for intersession agreement to measure pass/fail result consistency.

Related Experiment Videos

  • Analyzed the repeatability of defect type classification and quantified repeatability coefficients for test crossings.

    • Main Results:

    • Approximately 84% of subjects achieved the same pass/fail outcome in both test sessions.
    • The specific type of color vision defect was repeatable in about 80% of participants.
    • Repeatability for color-defective subjects was good but lower than previously reported for mixed populations.

    Conclusions:

    • The D-15 test demonstrates good, though not perfect, intersession repeatability in individuals with red-green color vision defects.
    • A recommendation is made to re-administer the test if a subject makes fewer than five crossings to ensure result reliability.
    • Findings suggest the D-15 test is a reasonably reliable tool for assessing color vision in relevant clinical settings.