[Recognizing the pitfalls. Pseudoglaucomatous visual fields]

Pseudo-glaucomatous visual fields pose two major problems: diagnosing optic nerve compression; diagnosing congenital optic nerve pathology. Looking for the deviation of each point on the schema is not enough: every total deviation value must be compared on both sides of the vertical median. Often, optic disc examination and clinical context can rectify a diagnosis. However, since 2002, it has been clear that normal-tension glaucoma diagnosis requires magnetic resonance imaging (MRI) to rule out intracranial compressive lesions involving the anterior visual pathway (of course, before imaging, other types of glaucoma will be ruled out).