Definition of "tritanopia" []

• A visual defect characterized by the inability to discern blue and yellow. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "I'm dubious about Wikipedia's tritanopia test -- I can barely make out part of the 5, and I have excellent color vision!"
• "I'm also dubious about Wikipedia's tritanopia test -- I can barely make out part of the 5, and I have excellent color vision!"
• "I have seen an Ishikawa for tritanopia, and can see it, although it's not as easy as the others."