38 plate Ishihara Color Blindness Test
Health ToolsA comprehensive online color vision test using 38 Ishihara plates. Check for color vision deficiencies including red-green color blindness (Protanopia/Deuteranopia) and general color vision problems.
How to Use 38 plate Ishihara Color Blindness Test
Frequently Asked Questions
What is the Ishihara Color Blindness Test?
The Ishihara test is the most common color vision deficiency test that uses colored plates with embedded numbers or lines to detect red-green color blindness and other color vision problems.
How accurate is this online version?
While this test follows standard Ishihara plate patterns, it should not replace a professional eye exam. It can reliably screen for common color vision deficiencies but may have limitations due to screen settings and lighting conditions.
What does the Ishihara test detect?
The Ishihara test is designed to detect red-green color blindness (Protanopia and Deuteranopia) and general color vision deficiencies. Specific plates help differentiate between red-blind (Protanopia) and green-blind (Deuteranopia) conditions.
How many plates should I complete?
For best results, complete all Ishihara test 38 plates. The test becomes more accurate with more responses, especially plates 22-25 which specifically differentiate between types of red-green color blindness.
What do the different plate types mean?
Number plates test basic color perception, while line-tracing plates test more subtle deficiencies. Some plates appear blank to color-blind individuals while showing patterns to those with normal vision.
Can children take this test?
Yes, but young children may need assistance understanding the instructions. The number recognition plates require basic number knowledge - consider using the line-tracing plates for younger children.