Difference Between III, Red Stimulus and III, White Stimulus Visual Fields

This is a comparison between a 10-2 visual field obtained with a III-red as compared to a III-white target. The patient was a 63-year-old female who had been on 400 mg per day of hydroxychloroquine for 16 years. She was 64 inches tall and weighed 160 pounds. She had no renal or liver disease. The white 10-2 is less sensitive, but more specific in checking for deficits. The pattern deviation plot is most useful for this test (blue arrows). The red 10-2 is more sensitive, which is why it is easier to see scotomas on the gray scale images. There is no pattern deviation plot for the III-red version of the 10-2 visual field.