The unit of measurement for describing lesion size and location on the fundus is the:
a. disc diameter.
b. macular diameter.
c. pupillary diameter.
d. centimeter.
A
When examining the eye and the fundus comes into focus, the branching of blood vessels be-comes apparent. These always branch away from the optic disc and can be used as landmarks to locate the optic disc. The disc itself measures about 1.5 mm in diameter and is therefore the unit of measurement used to describe lesion size and location on the fundus.
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