Which statement is true regarding color vision testing in clinical practice?

• A. Pseudoisochromatic plates are the most commonly used color vision test.
• B. Anomaloscope is the most commonly used.
• C. Ishihara plates are not used in color vision testing.
• D. Farnsworth Lantern Test is the only test used.

Answer: (A)

In clinical practice, screening color vision is most often done with pseudoisochromatic plates because they are quick, inexpensive, and effective for flagging red-green deficiencies in a wide range of patients. These plates use colored dots that form numbers or shapes visible to those with normal color vision but not to most color-deficient individuals, allowing for rapid screening. The Ishihara plates are a widely used set of these tests, making them the standard starting point in color vision assessment. Anomaloscope testing, while highly precise and valuable for distinguishing specific defect types and quantifying severity, requires specialized equipment and training and isn’t used as the routine screening test. The Farnsworth Lantern Test is primarily used in aviation screening and is not the only test employed for color vision, so it isn’t the default choice for general practice.