This is an up-to-date textbook on the theory and practice of visual field investigation. It discusses the many different techniques that are available for the examination of the visual field, for example, kinetic, suprathreshold, and full threshold, highlighting their advantages and disadvantages. The book also describes many of the current visual field instruments, detailing both their strategies and their techniques for analysing perimetric results. There is a comprehensive chapter describing how the visual field is affected by parameters, such as refractive errors and pupil size, with many useful tips as to how these can be controlled and compensated for. Pathologies which affect the visual field are discussed with special chapters devoted to glaucoma and the screening for glaucomatous visual field loss.