Which finding indicates an abnormality of the retina?
a. The optic disk is pinkish orange.
b. The ratio of the cup diameter to the entire disk is 1:5.
c. The ratio of arterial to venous width is 2:3.
d. The red reflex is present.
B
A normal finding when examining the retina is the presence of the red reflex, pinkish orange optic disk, with a yellow-white excavated center known as the physiologic cup. The ratio of the cup diameter to that of the entire disc is 1:3 . Normal arterial-to-venous width is a ratio of 2:3 or 4:5; therefore, an abnormality of the retina is a ratio of the cup diameter to the entire disc of 1:5.
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