Which test is used to assess a patient's color perception and detect color blindness?

The Ishihara test is specifically designed to evaluate color perception and identify color blindness in individuals. It utilizes a series of plates that contain colored dot patterns forming numbers or shapes that can be seen by those with normal color vision but may be indistinguishable to someone with color vision deficiencies. This test leverages various hues and contrasts to effectively assess the patient's ability to distinguish colors, making it a widely recognized tool in both clinical and educational settings for detecting color blindness.

In contrast, the Snellen test primarily measures visual acuity or sharpness of vision, rather than color perception. The Rosenbaum test serves to assess near vision and reading ability, focusing on a person's capability to see text up close, while the Biometrics test is generally not applicable to vision assessment and relates more to the measurement and analysis of biological data.