The Graham Field® Ishihara® Test Chart Book is a trusted and widely used tool for identifying color vision deficiencies. Containing 14 color plates, this test distinguishes between normal color perception and various forms of red-green color blindness (both complete and incomplete). Four of the plates are specifically designed to determine the type and degree of the color vision defect. This album-style book format makes it easy to handle, ensuring smooth testing procedures in clinics, vision centers, schools, and workplaces. Detailed instructions are included, assisting professionals in administering the test accurately and effectively.