A retrospective cohort study suggested that people with color blindness may have a higher risk of mortality from bladder ...

FILE - A Union Pacific train travels through Union, Neb., July 31, 2018. The federal government has joined a number of former workers in suing Union Pacific over the way it used its own vision test to ...

Our ability to see with color vision depends on the presence and function of light-sensing pigments in the cones of our eyes. Color blindness, or color vision deficiency, happens when one or more of ...

Color blindness, or color vision deficiency, causes a person to see colors differently from most other people. There are several types of color blindness. Color vision deficiency or loss has multiple ...

OMAHA, Neb. (AP) — The federal government has joined more than a dozen former workers in suing Union Pacific over the way it used a vision test to disqualify workers the railroad believed were color ...