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Lanthony D15 for Occupational Testing: Short-term Repeatability.

Genna Lo1, Jason S Ng

  • 1Southern California College of Optometry, Marshall B. Ketchum University, Fullerton, California.

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|January 17, 2023
PubMed
Summary
This summary is machine-generated.

The Lanthony D15 color vision test shows high short-term repeatability. Two trials are sufficient for occupational testing, providing reliable results for color vision deficiency assessment.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • The Lanthony D15 test is used for color vision deficiency assessment.
  • Previous reports suggest poorer repeatability for the Lanthony D15 compared to the Farnsworth D15.
  • Occupational testing requires reliable and repeatable color vision assessments.

Purpose of the Study:

  • To determine the short-term repeatability of the Lanthony D15 test.
  • To investigate learning effects across repeated trials of the Lanthony D15.
  • To establish the optimal number of trials for reliable occupational testing using the Lanthony D15.

Main Methods:

  • Twenty male subjects with congenital color vision deficiency participated.
  • Ten trials of the Lanthony D15 were administered in a single visit.
  • Color confusion index scores were analyzed using repeated-measures ANOVA and intraclass correlation coefficient (ICC).

Main Results:

  • No significant differences in color confusion index scores were found across 10 trials (P = .18).
  • The intraclass correlation coefficient (ICC) for the Lanthony D15 was 0.81, indicating high repeatability.
  • An average of two trials achieved an ICC of 0.8, considered sufficient for occupational testing.

Conclusions:

  • The Lanthony D15 test demonstrates fairly high short-term repeatability.
  • Two trials of the Lanthony D15 are sufficient for reliable occupational testing.
  • While more trials may increase clinical certainty, two trials balance reliability and efficiency.