This book mainly introduces the progress of ocular myasthenia gravis from the aspects of epidemiology, etiology and inducement, pathogenesis, clinical features, auxiliary examination, diagnosis and differential diagnosis and treatment, etc. In addition to cover some progress in the treatment of ocular myasthenia gravis, the authors also discuss some issues with controversial. The diagnosis of ocular myasthenia gravis mainly depends on the clinical manifestations of the patient, and patients often do not seek medical treatment until they have obvious ptosis or double vision, which is easy to be missed and misdiagnosed. Treatment for ocular myasthenia gravis is mainly to relieve ocular symptoms and delay or prevent progression from ocular myasthenia gravis (OMG) to generalized myasthenia gravis (GMG). The authors highlight the early and correct diagnosis and treatment of OMG, which is the key to improve patients' quality of life and reduce OMG conversion rate. The translation was done with the help of artificial intelligence. A subsequent human revision was done primarily in terms of content, so that the book will read stylistically different from a conventional translation.