The visual field is a map of the visual system, from the optic nerve through the optic chiasm and optic tracts, to the visual cortex. Ever since Hippocrates described hemianopic field defects during the fifth century BCE, physicians have used this map in navigating the waters of ophthalmology and neurology.
Defects in recognition of light stimulation at various positions and intensities can be useful in localizing pathological conditions, including glaucoma, optic neuritis, pituitary adenomas, and intracerebral aneurysms. Improved radiological imaging (especially computed tomographic and magnetic resonance scanning) has supplanted some of the importance of the visual field as a localizing tool. Nonetheless, familiarity with the techniques and interpretation of field data is important for both diagnosis and follow-up of neuro-ophthalmologic conditions.
This textbook is a classic in the clinical perimetry literature. The first edition appeared in 1956, when perimetry was coming into widespread use, thanks in large part to the