Ishihara testing is a color blindness test.

• A. Ishihara testing
• B. Ear lavage
• C. Snellen testing
• D. Audiometer

Answer: (A)

Ishihara testing uses color plates to check color vision, especially red-green differences. The plates show colored dots that form a number or shape visible to people with normal color perception, while those with color deficiencies may see a different number or none at all. This makes it a quick and common screening tool for color blindness in schools and workplaces that have color-vision requirements. It’s specifically designed for red-green deficiencies, and other types of color vision problems may require different tests. The other options aren’t about color vision: ear lavage is ear cleaning, Snellen testing measures visual acuity with a chart, and an audiometer tests hearing.