The process of “seeing” begins with the eyes in the front of the cranium; the visual pathways then traverse the length of the brain to the occipital cortex, where visual information is then passed forward to many cortical areas. It is no surprise that in addition to ocular diseases, many intracranial disorders interrupt and damage these pathways, producing visual loss.
This section begins with a discussion of the clinical tools used to evaluate afferent visual function (Chapter 2). In Chapter 3, patterns of visual field loss are discussed in the context of the organization of the visual system. Chapters 4 and 5 explore the neuroanatomy of the afferent visual pathways and specific disease states that can affect it. Chapter 6 discusses a common reason for neuro-ophthalmic consultation: unexplained visual loss.