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[The Ohkuma's test: an evaluation].

P Lanthony1

  • 1Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, Paris, France.

Ophthalmologica. Journal International D'Ophtalmologie. International Journal of Ophthalmology. Zeitschrift Fur Augenheilkunde
|January 1, 1990
PubMed
Summary
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Ohkuma's pseudoisochromatic test effectively diagnoses the axis of hereditary dyschromatopsias (protan or deutan). While good for screening, its quantitative gradation for detecting dichromatism was only fair.

Area of Science:

  • Ophthalmology
  • Vision Science
  • Genetics

Context:

  • Hereditary dyschromatopsias represent a significant challenge in accurate color vision assessment.
  • Existing color vision tests include Ishihara, HRR, Farnsworth Panel D-15, and City University Color Vision Test.
  • Evaluating novel diagnostic tools is crucial for improving color vision screening and diagnosis.

Purpose:

  • To evaluate the diagnostic accuracy and efficiency of Ohkuma's pseudoisochromatic test.
  • To compare Ohkuma's test performance against established color vision tests.
  • To assess the qualitative and quantitative capabilities of Ohkuma's test for hereditary dyschromatopsias.

Summary:

  • Ohkuma's pseudoisochromatic test was evaluated in 147 subjects, including 130 with hereditary dyschromatopsias.

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  • Qualitatively, the test demonstrated higher accuracy in diagnosing the protan or deutan axis of dyschromatopsia compared to other tests.
  • Quantitatively, the test showed good screening efficiency but mediocre gradation, identifying dichromatism in approximately 75% of cases.

    • Impact:

    • Ohkuma's test offers improved qualitative diagnosis for the axis of dyschromatopsia.
    • The test serves as an efficient screening tool for color vision deficiencies.
    • Further refinement may enhance its quantitative capabilities for more precise diagnosis of dichromatism.