Visual field testing is an important part of the assessment of the afferent visual system. This chapter reviews the clinical process of visual field evaluation and the localization of lesions that affect the visual system. The visual field can be thought of as an island with an outer edge beyond which one cannot see and with an elevated center. The normal extent of the peripheral field of vision from the center is 90° to 100° temporally, 75° inferiorly, and 60° nasally and superiorly. Visual fields are subjective and should be considered only 1 part of the examination of the visual pathways.
Neuro-Ophthalmology of the Pregeniculate Afferent Visual System
