Ishiharafärgplattor
Ishiharafärgplattor, often referred to as Ishihara plates, are a type of pseudoisochromatic optical instrument used to detect color vision deficiencies, most commonly red-green color blindness. Developed by Japanese ophthalmologist Dr. Shinobu Ishihara, these plates present a series of dotted figures embedded within a background of similarly colored dots. The figure and background are designed to have different color combinations that are difficult for individuals with specific types of color blindness to distinguish.
The plates are typically arranged in a sequence, with some plates designed to reveal a number or
The effectiveness of the Ishihara test relies on the principle of confusion lines, which are color combinations