The Keith-Wagner-Barker system group IV is characterized by the development of:
a. increased light reflex in the arterioles.
b. crossing defects.
c. cotton wool spots.
d. papilledema.
D
The Keith-Wagner-Barker system is used to classify changes to the eyes caused by hypertension. Group IV is the class that represents evidence of papilledema. An increased light reflex is in group I, crossing defects are in group II, and cotton wool spots are in group III.
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