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The optic pathway includes the retina, the optic nerve, the optic chiasm, the optic radiations, and the occipital cortex (see Fig. 1: Optic Nerve Disorders: Higher visual pathways—lesion sites and corresponding visual field defects. ). Damage along the optic pathway causes a variety of visual field changes (see Table 1: Approach to the Ophthalmologic Patient: Types of Field Defects  ).
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Fig. 1
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Higher visual pathways—lesion sites and corresponding visual field defects.
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With retrochiasmal lesions, visual field defects tend to become more symmetric (congruous) as shown with the occipital lesion in #4.
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Last full review/revision July 2008 by James Garrity, MD
Content last modified July 2008
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