Help Needed in the Shaded Areas
William H. Bennett April 1971 Tuesday Afternoon Session
While serving in the army during World War II, I was required to take the Ishihara eye test, which makes use of different colors, designs, and numbers to diagnose color blindness in its various forms. Under this test, those affected by certain forms of color blindness are able to distinguish the solid colors without difficulty, but the shaded areas in between the solid colors present problems. Those who are color blind do not discern correctly; and, no matter how hard they try, they are not able to distinguish the differences in hue that are obvious to the normal eye.