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The Lanthony D15 Color Test Can be Learned.

Background: The Lanthony desaturated color vision test is a color arrangement test wherein a patient must arrange 15 caps into color order. It is a difficult test for color-normal patients and is even more challenging for color vision-deficient patients due to its low saturation, which makes the cap...

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Published in:Optometry & Visual Performance Vol. 9; no. 3; pp. 142 - 149
Main Author: Ng, Jason S.
Format: case study tables/charts Journal Article
Published: Optometric Extension Program Sep2021
Online Access:View this record in EBSCOhost
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      dt: Sep2021
      vid: 9
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      pub: Optometric Extension Program
      place: Lutherville Timonium, Maryland
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        atl: The Lanthony D15 Color Test Can be Learned.
      aug:
        au: Ng, Jason S.
        affil: Southern California College of Optometry at Marshall B. Ketchum University Fullerton, California
      sug:
        subj:
          Color Vision Defects Diagnosis
          Color Perception Tests Methods
          Learning
          Adult
          Male
          Color Perception
          Optometry Methods
          Severity of Illness
          Adult: 19-44 years
          Male
      ab: Background: The Lanthony desaturated color vision test is a color arrangement test wherein a patient must arrange 15 caps into color order. It is a difficult test for color-normal patients and is even more challenging for color vision-deficient patients due to its low saturation, which makes the cap-color differences fairly small. Despite the challenge, this case report will show that the test may not always be reliable. Case Report: A 25-year-old Caucasian male returned to our office for continued evaluation for color vision deficiency. He had previously been diagnosed with protanopia based on anomaloscope testing, which was consistent with other color tests. The patient had previously shown learning on the easier Farnsworth saturated color test and was interested in attempting to learn a harder test. The patient was sent home with a Lanthony color test and Richmond Illuminator. He returned for follow-up testing, which showed that he was able to score perfectly on the Lanthony desaturated color test, which was very surprising. Conclusion: This case shows that for some highly motivated patients, the Lanthony D15 color test may be subverted, and knowledge of this possibility is important for clinicians to consider.
      pubtype: Academic Journal
      doctype:
        case study
        tables/charts
        Journal Article
      ougenre: Article
    language: English
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