What are two main examples of Pseudoisochromatic Plate tests that are used clinically to test color vision?

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The selection highlights the Ishihara plates and the HRR (Hardy-Rand-Rittler) plates as prominent examples of Pseudoisochromatic Plate tests used in clinical settings for the assessment of color vision.

Ishihara plates are widely recognized for their efficacy in detecting red-green color deficiencies. This test consists of a series of plates displaying a mosaic of colored dots, where numbers or shapes formed from dots of one color can be discerned against a differently colored background. The specific colors and their arrangements are designed to be perceived differently by individuals with normal color vision compared to those with certain types of color vision deficiencies.

HRR plates also serve a similar purpose, focusing on identifying various types of color vision deficiencies. These plates, like Ishihara's, use colored dots to create images which are distinguishable only to individuals with normal color perception. The use of HRR plates can be particularly thorough in evaluating not just red-green deficiencies but also other forms of color vision anomalies.

The choice of these two tests as examples of Pseudoisochromatic Plate tests is significant because they are specifically designed to exploit the physiological differences in color perception, providing a reliable means to diagnose and quantify color vision deficiencies clinically. Other tests mentioned in other choices

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