Originally Posted by LivingInMEM

The Capt and SO didn't have color vision issues, but they didn't see the low indications either (I recognize that the SO has other duties). I'd say that fatigue was the more likely culprit. Just because he had color deficient characteristics doesn't mean they were causal. Notice that the Dr that ran the Brooks ophthalmologic branch is the same person that wrote the report for the FedEx mishap. Of course he is going to give opinion that the color defect was causal, that's his mission in the USAF.

The FALANT does only test for red, green, and white; that's no mistake because those are the colors required for aviation. That's all they test for when they do a light gun signal test. Eventually, they'll be able to test for all kinds of medical deficiencies, should they eliminate aviation candidates for all of them?