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Color vision deficiency affects 1 in 12 men, with most occurring as one grows older. (Women is 1 in 200). As a result, jewelers, dealers, and appraisers should have their color vision checked as they get older. One of the most complete color vision testing systems is the Farnsworth Munsell Test. However, indicators of color vision problems can easily be determined by the Ishihara Color Vision Test Plates.
In 1917 a professor at the University of Tokyo, Shinobu Ishihara, developed a series of images that served to test color vision deficiencies. The “Ishihara Plates” have served as a basic color vision test for deficiencies in red-green color since that time and is considered an important indicator for acquired color vision defects for those whose jobs rely on accurate color vision. According to the National Library of Medicine:
“The Ishihara plates are widely used as a test for colour vision. Originally designed for the purpose of detecting congenital red-green colour blindness, the test also has some value in demonstrating acquired colour vision defects.”
The ISG (International School of Gemology) has offered Ishihara Color Vision Testing as part of our program for over 15 years. Today, I thought it would be fun to let everyone do a few of the Ishihara Vision Tests, with certain caveats.
#2
#3
#4
#5
Answers: #1 = 12, #2 = 8, #3 = 5, #4 = 29, #5 = 74.
These are 5 of the 10 Ishihara Color Vision Plates. You can take the full 10 plate Ishihara Color Vision test on the ISG website at this link: ISG Ishihara Color Vision Test.
The full testing set is part of our ISG Registered Gemologist Appraiser/Registered Gemologist Program, and widely available through other vision testing.
Visit the ISG website to learn more about our world-class programs in gemology and jewelry appraisal at our low tuition rates.
In 1917 a professor at the University of Tokyo, Shinobu Ishihara, developed a series of images that served to test color vision deficiencies. The “Ishihara Plates” have served as a basic color vision test for deficiencies in red-green color since that time and is considered an important indicator for acquired color vision defects for those whose jobs rely on accurate color vision. According to the National Library of Medicine:
“The Ishihara plates are widely used as a test for colour vision. Originally designed for the purpose of detecting congenital red-green colour blindness, the test also has some value in demonstrating acquired colour vision defects.”
The ISG (International School of Gemology) has offered Ishihara Color Vision Testing as part of our program for over 15 years. Today, I thought it would be fun to let everyone do a few of the Ishihara Vision Tests, with certain caveats.
- Color duplication of computer screens can vary, and
- Failure to identify any of the numbers serves only as an indicator, and
- If you cannot see the numbers it only means to get checked further.
#2
#3
#4
#5
Answers: #1 = 12, #2 = 8, #3 = 5, #4 = 29, #5 = 74.
These are 5 of the 10 Ishihara Color Vision Plates. You can take the full 10 plate Ishihara Color Vision test on the ISG website at this link: ISG Ishihara Color Vision Test.
The full testing set is part of our ISG Registered Gemologist Appraiser/Registered Gemologist Program, and widely available through other vision testing.
Visit the ISG website to learn more about our world-class programs in gemology and jewelry appraisal at our low tuition rates.
