Localization of visual field defects in multiple sclerosis.

Demyelinating plaques can occur throughout the central nervous system in multiple sclerosis, possibly involving the visual pathways at any location. The proper evaluation of visual field defects in multiple sclerosis patients enables the optometrist to become a part of the health care team in monitoring the severity and progression of the disease. Three case reports are presented which illustrate the variable presentations and the proper interpretation of findings to localize demyelinating plaques in the visual pathways.