Ishihara 14 Plate Test Pdf [360p]
For clinical use, purchase the official test from Kanehara Trading Co. or a licensed medical supplier. Disclaimer: This article is for informational and educational purposes. It does not constitute medical advice. Always consult a qualified eye care professional for color vision diagnosis.
Introduction The Ishihara Color Vision Test is the world’s most recognized screening tool for red-green color vision deficiencies. While the full test contains 38 plates, the Ishihara 14 plate test is a shortened, efficient version widely used in schools, driver’s license exams, and industrial screenings. This article explains what the 14 plate test is, how to administer it, how to interpret results, and its limitations. What Is the Ishihara 14 Plate Test? Designed by Dr. Shinobu Ishihara at the University of Tokyo in 1917, the test uses pseudo-isochromatic plates—each containing a circle of colored dots. Within these dots, a number (or tracing line) is embedded in a different color. A person with normal color vision sees one number, while a person with red-green deficiency sees either a different number or no number at all. ishihara 14 plate test pdf
| Plates 1 | Demonstration – Everyone should see “12”. If not, check illumination or suspect severe deficiency. | |----------|---------------------------------------------------------------------------------| | Plates 2–5 | Normal: “8”, “6”, “29”, “57”. Red-green deficiency: Different numbers or nothing. | | Plate 6–7 | Vanishing plates – Normal sees “5” (plate 6) and “3” (plate 7). Deficiency sees nothing. | | Plates 8–9 | Diagnostic – Helps distinguish protan (red-deficient) from deutan (green-deficient). | | Plate 10–14 | Additional vanishing/transformation plates for confirmation. | For clinical use, purchase the official test from
