Ishihara Test Chart Books for Color Deficiency 38 Plates with User Manual and One Eye OCCLUDER

Classification design: This is used to differentiate between red- and green-blind persons. The vanishing design is used on either side of the plate, one side for deutan defects an the other for protans. * Diagnostic plates: intended to determine the type of color vision defect. * Color plates encased in specially designed album-type books for ease of handling. Detailed instructions included. Individuals with color vision defect should see a different figure from individuals with normal color vision. Hidden digit design: Only colorblind people are able to spot the sign. If you have perfect color vision, you won’t be able to see it.