Color blindness : Symptoms & Signs, Diagnosis & Tests

Symptoms & Signs

Symptoms vary from person to person, but may include:

  • Trouble seeing colors and the brightness of colors in the usual way
  • Inability to tell the difference between shades of the same or similar colors

Often, the symptoms may be so mild that some persons do not know they are color blind. A parent may notice signs of color blindness when a child is learning his or her colors.

Rapid, side-to-side eye movements and other symptoms may occur in severe cases.

Diagnosis & Tests

Your doctor or eye specialist can check your color vision in several ways. Testing for color blindness is commonly done during an eye exam.


Review Date : 4/13/2009
Reviewed By : Paul B. Griggs, MD, Department of Ophthalmology, Virginia Mason Medical Center, Seattle, WA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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