Check the listing for details. Ishihara Color Tests for Color Deficiency - 24 Plates. Condition: Used. Listed at 29.99 USD. The Ishihara Color Tests for Color Deficiency are a set of 24 plates designed to assess a person's color vision. These tests are commonly used in healthcare, labs, and dental settings to determine if an individual has a color deficiency, such as red-green or blue color blindness. The Ishihara plates consist of various patterns and colors that are specifically designed to identify color vision deficiencies, making them a valuable tool for professionals in the medical and industrial sectors.