[Ocular myositis/myasthenia (author's transl)]

Case report on a patient with varying motility disturbances. He first presented with typical clinical and electromyographic symptoms and signs of ocular myositis, which subsided after immunosuppressive therapy. Three years later he developed ocular myasthenia. The diagnostic procedures (especially electromyography, immunology, differential diagnosis and possible underlying pathomechanisms are discussed.