Ishihara Chart

 Ishihara color blindness test chart. This chart is used to diagnose color vision deficiencies. 

• COLOUR BLIND Chart: The cover of the book indicates its purpose.
• Multiple Plates: The book contains several plates with multicolored dot patterns. These patterns are designed to reveal numbers or shapes that individuals with normal color vision can see, but those with color vision deficiencies may not.
• Plate Codes: Specific plates are labeled with codes such as CVD B14, CVD B24, and CVD B38, which correspond to different test plates within the book.

This type of chart is commonly used by optometrists to evaluate a patient’s ability to perceive colors accurately.