[Skip to Content]
Visit us on Facebook Visit us on FacebookVisit us on Twitter Visit us on TwitterVisit our RSS Feed View our RSS Feed
Blogadillo May 17th, 2022
CategoriesCategoriesCategories Contact UsContact Us ArchivesArchives Region/OfficeRegion SearchSearch



Date prong graphic

Color Blindness Basics

Posted by on December 12th, 2017

The American Academy of Ophthalmology defines color blindness as “when you are unable to see colors in a normal way.”

There are three variants of color blindness:

  • Red-green color vision defects which are the most common form.
  • Blue-yellow color vision defects.
  • Complete absence of color vision.

According to the National Eye Institute, “men are much more likely to be colorblind than women because the genes responsible for the most common, inherited color blindness are on the X chromosome. Males only have one X chromosome, while females have two X chromosomes. In females, a functional gene on only one of the X chromosomes is enough to compensate for the loss on the other. This kind of inheritance pattern is called X-linked, and primarily affects males.”

The National Weather Service has put together a simulation (below) of what each variant of color blindness would see compared to someone with normal vision.


Most of the time, color blindness is genetic. There is no treatment, but most people continue with normal activities with little to no limitations.

Follow NNLM SCR on Twitter and like us on Facebook.

Image of the author ABOUT nnlmscr

Email author View all posts by

Blog Categories

Archived Content

Funded under cooperative agreement number UG4LM012345 with the University of North Texas Health Science Center - Gibson D. Lewis Library, and awarded by the DHHS, NIH, National Library of Medicine.

NNLM and NETWORK OF THE NATIONAL LIBRARY OF MEDICINE are service marks of the US Department of Health and Human Services | Copyright | HHS Vulnerability Disclosure | Download PDF Reader