Ishihara test
Dotted number plates
The Ishihara test is a color vision assessment using plates of colored dots with numbers or patterns hidden within them.
People with normal color vision see the embedded figures; those with red-green color blindness cannot distinguish them from the surrounding dots.
Named for its Japanese inventor, the test is standard in medical and occupational screenings: He failed the Ishihara test and couldn't become a pilot.
Inability to see red
- deuteranopiaInability to perceive green
- red-greenTwo-hue vision deficiency
- deficiencyLack of something needed
- daltonismDefective color perception
color vision · inherited · congenital · acquired · genetic · photopigments · severity
Eye disease physician
- optometristVision care professional
- vision testingEvaluating ocular acuity
- FarnsworthTelevision's primary inventor
- clinicalEmotionally detached, medically precise
Assessment of sight
- occupationalRelated to one's work
- pilotOne who steers aircraft
- militaryArmed forces collectively
- driverVehicle operator
employment · school · pediatric · pass · fail · diagnosis · detection · assessment
Marked with small points
- circlesEquidistant curves from centers
- numeralsSymbols for quantities
- hidden figuresData or people unseen
- vanishingCeasing to be visible
transformation · diagnostic · demonstration · concealed · mosaic · pattern recognition
protanopia
Inability to see red
- deuteranopiaInability to perceive green
- red-greenTwo-hue vision deficiency
- deficiencyLack of something needed
daltonism · color vision · inherited · congenital · acquired · genetic · photopigments · severity
ophthalmologist
Eye disease physician
- optometristVision care professional
- vision testingEvaluating ocular acuity
- FarnsworthTelevision's primary inventor
eye exam
Assessment of sight
- occupationalRelated to one's work
- pilotOne who steers aircraft
- militaryArmed forces collectively
driver · employment · school · pediatric · pass · fail · diagnosis · detection · assessment · standardized
dotted
Marked with small points
- circlesEquidistant curves from centers
- numeralsSymbols for quantities
- hidden figuresData or people unseen
vanishing · transformation · diagnostic · demonstration · concealed · mosaic · pattern recognition
- color visioncolor blindness, red-green blindness, color matching, color discrimination, primary colors
- eye testseye exam, eye chart, eye tests, visual acuity, vision screening
- color sciencecolor space, colorimetry, color gamut, chromaticity, chroma
- color vision testscolor plates
- color blindnesscolor blindness, protanopia, deuteranopia, red-green blindness, daltonism