JCAN Korean Language CenterBack to examsColor-vision practice
Ishihara practice
Each attempt has 12 randomized dot plates with numbers from 1 to 99. Retrying selects different numbers and creates new dot patterns. Use normal lighting, turn off night mode and color filters, and view each plate without zooming. Enter the number you see, or choose “I cannot see a number.” Answers appear after submission.
These original JCAN generated plates are inspired by Ishihara dot patterns; they are not validated diagnostic plates or a calibrated Ishihara examination. Screen colors affect results. This practice cannot diagnose color blindness or determine EPS eligibility; consult an eye-care professional for an official assessment.
Plate 1 of 12
Unable to load this plate. Please reload the page before continuing.
Your practice results
This is a comparison with the expected numbers, not a medical pass or fail. If you had difficulty, arrange a professional color-vision assessment.
| Plate | Your answer | Expected number | Comparison |
|---|
Plate sources and credits
Practice plates are generated locally in your browser by JCAN. Historical reference images are also included in this website, unchanged. Original plates: Shinobu Ishihara. Wikimedia Commons lists plates 1 (vector: Nicoguaro), 9 (vector: Pbrks) and 11 as public domain. Numeral 2 example: Sakurambo / Philip Ronan, used under CC BY 2.5. This is a selection of educational examples, not the full standard plate set.
