Spencer Caradine, 21, told Channel 2's Carol Sbarge that he never knew he suffered from red-green colorblindness until a co-worker noticed. "I never thought it was a problem," Caradine said.

That's exactly what happened to Douglas County, Georgia firefighter Spencer Caradine. "I never knew that there was a different red in my eyes," he said. Caradine is colorblind and he only recently ...