The Rabin Cone Contrast Test (RCCT) is one of only three color vision tests accepted by the Federal Aviation Administration and represents one of the most advanced, quantitative assessments of color vision available today. Developed through more than 15 years of U.S. Air Force–led research, the Rabin test precisely measures the function of each individual cone pathway (red, green, and blue), allowing clinicians to identify both congenital color vision deficiencies and subtle acquired color vision loss. In addition to formal color vision qualification, the Rabin Cone Contrast Test is widely used to detect and monitor color vision changes associated with retinal, optic nerve, and neurologic conditions, as well as medication-related retinal toxicity.