The book succinctly illuminates the clinical picture of keratoconjunctivitis sicca, also known as the Sicca syndrome, which is increasingly coming into focus in research and everyday practice. The causes of dry eye complaints are complex, and the suffering of those affected is significant. This book addresses this issue: in a compact, bullet-point format, it provides practical guidance for diagnostic and therapeutic management. The clinical causes are described in a structured manner. A suggested practical testing sequence, along with 12 case studies, illustrates targeted counseling and therapy for those affected. An Excel spreadsheet offers an overview of common artificial tear substitutes and their properties, helping to find an optimal basic therapy for different patients. Individual overviews facilitate quicker assessments.