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Color Vision Deficiency (2A)

Color vision deficiency, also called color blindness, refers to difficulty in discriminating colors. Students with the most common form of color blindness have difficulty distinguishing between red and green. Others may have difficulty differentiating blue from yellow. In very rare cases, a student may be unable to see any color at all.
Color blindness is a result of abnormalities in the pigments in certain nerve cells of the eyes (cones). Students with color blindness may have trouble seeing colors or brightness of color, or be unable to differentiate between shades of the same or similar colors. Color blindness is most often a genetic condition, and is seen more frequently in men. It is also quite common, with nearly 1 in 10 men having some form of color blindness. Color vision deficiencies impact students when color is a key part of the content (e.g. the color of a chemical solution reveals whether the experiment was performed correctly), or when color is used as a key instructional technique (e.g. the instructor uses red and green to highlight differences between topics).

Formal Diagnostics

Diagnosis of a color vision deficieny by any vision professional or physician is sufficient documentation.

Intake Questions

  • What colors can you distinguish?
  • What accommodations or strategies have been effective in the past?


The Building Accepting Campus Communities (BACC) project was funded by the US Department of Education Office of Secondary Education grant #P333A080070-09. The University of Nebraska does not discriminate based on gender, age, disability, race, color, religion, marital status, veteran's status, national or ethnic origin, or sexual orientation.