A Comparison Between Three Computer-Based Cone Specific Color Vision Tests

Area of Science:

• Ophthalmology
• Vision Science
• Medical Technology

Background:

• Computerized color contrast sensitivity (CS) tests are available for diagnosing color vision deficiency (CVD).
• Limited data exists on the agreement and comparability between different computerized CS testing systems.
• Accurate assessment of CVD is crucial for occupational safety and performance standards.

Purpose of the Study:

• To evaluate the data agreement between three computerized color vision tests: Konan CCT-HD®, NCI, and Innova CCT.
• To compare the sensitivity and specificity of these tests in identifying different types of color vision deficiencies.
• To analyze differences in log CS values and their implications for occupational classification.

Main Methods:

• Fifty subjects (25 with normal color vision, 25 with color vision deficiency) were tested.
• The Konan CCT-HD®, NCI, and a modified Innova CCT were used for testing.
• Sensitivity, specificity, and log CS values were compared across tests.

Main Results:

• All three tests demonstrated 100% sensitivity for detecting hereditary red-green CVD and classifying protan vs. deutan types.
• 100% specificity was observed for confirming normal red-green color vision.
• Innova CCT and NCI showed 100% specificity for S cone CS, while Konan CCT-HD® showed 96% and 92% specificity, respectively.

Conclusions:

• The tested computerized color vision tests reliably identify hereditary CVD and normal color vision.
• Minor discrepancies in log CS values exist, potentially affecting pass/fail scores on a 100-point scale.
• Protan deficiencies consistently yield lower scores than deutan deficiencies, necessitating careful consideration for occupational criteria.