The 6th edition of the Visual Field Digest is a comprehensive and practical guide to perimetry and the Octopus perimeter. This edition not only presents all key features of the Octopus perimeter, but also explains fundamentals of perimetric testing with more than 200 illustrations in an easy to grasp and practical manner and concludes with a clinical case section. This makes the Visual Field Digest an invaluable resource for clinicians, residents, students, researchers and visual field examiners.