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An Ishihara color blindness test plate consisting of a large circular field filled with densely packed dots of varying sizes. The background dots within the circle are shades of olive green and yellow. Embedded in the center is the number 67, formed by dots in contrasting shades of muted red and coral. The area outside the main circle is filled with darker, muted brownish-green dots, creating a seamless pointillism texture typical of medical optical illusions.