Eye Health Kid's Eye Health Color Blindness By Troy Bedinghaus, OD linkedin Troy L. Bedinghaus, OD, board-certified optometric physician, owns Lakewood Family Eye Care in Florida. He is an active member of the American Optometric Association. Learn about our editorial process Troy Bedinghaus, OD Medically reviewed by Medically reviewed by Johnstone M. Kim, MD on January 28, 2020 Johnstone M. Kim, MD, is board-certified in ophthalmology. He's a practicing physician at Midwest Retina in Dublin, Ohio and previously served as a full-time faculty member at the Wayne State University School of Medicine and the Kresge Eye Institute in Detroit, Michigan. Learn about our Medical Review Board Johnstone M. Kim, MD on January 28, 2020 Print Do color blind people really see only black and white? The term "color blindness" confuses many people. The topic of color blindness is fascinating because of its complexity. Many people believe that anyone labeled as "color blind" is only able to see the colors of black and white. However, it is extremely rare to be totally color blind. Although there are exceptions, most patients affected by color blindness are able to see colors other than black and white—they just perceive them in a different way. SSPL / Getty Images It's Not All Black and White Colorblind people seem to have trouble differentiating colors and may simply confuse one color with another. We all have cones in our eyes that enable us to see colors. We have red, blue, and green cones that help us to see those colors as well as combinations of those colors. In order to see all colors correctly, a person needs to have all three types of cones. A person who is color blind doesn't have normal cones or the cones don't work properly. If the cones fail to function correctly or make the wrong combinations, the brain doesn't receive the correct messages about the colors you are perceiving. For example, a color blind person may perceive a green leaf as gray or tan. Color blindness is often inherited, but may also occur because of eye, nerve, or brain damage, or from exposure to certain chemicals. Although it is not thought of as a debilitating condition, color blindness can be very frustrating to a person affected by it. Eye doctors can test for color blindness during an eye examination. One test is a picture made up of different colored dots. The doctor will ask you to identify a picture located in the center of the dots. If a patient cannot make out a picture, he may be considered to be colorblind. Learn All About Tunnel Vision A Word From Verywell Did you know that boys are far more likely to be color blind than girls? Surprisingly, about 1 out of every 12 boys is at least a little color blind. Boys are more affected because the gene for color blindness is located on the X chromosome. Since males only possess one X chromosome, they are more likely to be affected as they only need to have one defective gene. Women have two X chromosomes so they would need to have the defective gene on both of them to suffer from color blindness. The sooner color blindness is detected, the better. Early diagnosis is crucial in preventing possible learning difficulties at school where adjustments can be made in order to help the student at school. Was this page helpful? Thanks for your feedback! Sign up for our Health Tip of the Day newsletter, and receive daily tips that will help you live your healthiest life. Sign Up You're in! Thank you, {{form.email}}, for signing up. There was an error. Please try again. What are your concerns? Other Inaccurate Hard to Understand Submit Article Sources Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. U.S. National Library of Medicine Genetics Home Reference. Color vision deficiency. Updated January 2015.