Introducing a new computer-based test for the clinical evaluation of color discrimination.

Abstract

PURPOSE:

To evaluate the Portal color sort test (PCST), a new computer-based test of color vision, by comparing it with a series of clinical tests of color vision in normal and color deficient subjects.

DESIGN:

Prospective clinical laboratory study.

METHODS:

Fifty-nine subjects with normal trichromatic vision or with congenital color vision defects underwent a series of color vision tests that included the 15-plate Ishihara test, the D-15 Farnsworth-Munsell test (D-15), the Farnsworth-Munsell 100-Hue test (FM 100-Hue), and the PCST under rigorous standardized conditions, as recommended by the respective manufacturers. The PCST generates a numerical discrimination score comparable to the FM 100-Hue.

RESULTS:

To test validity, discrimination scores generated by the PCST were compared with scores on the FM 100-Hue. The Spearman rank correlation between discrimination scores on the FM 100-Hue and the PCST was 0.8 (P < .001). Reliability was assessed by asking patients to retake the PCST at a later sitting. Patients retaking the PCST achieved similar scores on their second sitting as on the first. The correlation in the score between the two tests was 0.7 (95% confidence interval [CI]: 0.4-0.9, P < .001). Median (quartiles) time to complete the PCST was 3.1 minutes. This was faster than the FM 100-Hue time (P < .001), but slower than both the Ishihara and the D-15 (both P < .001).

CONCLUSIONS:

This study suggests that the PCST, a test of color vision deficiency, can be used effectively and reliably as a tool for screening (comparable to the Ishihara plates and the D-15) and grading (comparable to the FM 100-Hue) color discrimination ability.

• Authors: Alex Melamud, Ellen Simpson, Elias I Traboulsi
• Journal: American journal of ophthalmology (Am J Ophthalmol) Vol. 142 Issue 6 Pg. 953-60 (Dec 2006) ISSN: 0002-9394 [Print] United States
• PMID: 17157581 (Publication Type: Comparative Study, Journal Article)

Topics

• Adolescent
• Adult
• Color Perception
• Color Perception Tests (methods)
• Color Vision Defects (diagnosis)
• Diagnosis, Computer-Assisted
• Female
• Humans
• Male
• Middle Aged
• Prospective Studies
• ROC Curve
• Reproducibility of Results