Quick! When was the last time you read a good text on electrophysiology of vision? Or perhaps a less threatening question: when was the last time you needed electrophysiology and weren't sure what test would answer the essential question for your patient? Dr Lam is the sole author of this wonderful text for clinical testing and its application to specific ocular disorders. The preface states the purpose of the text is “to provide the clinician with practical information of visual electrophysiologic tests in an accessible and understandable format.” That goal was achieved!