Does anyone know about ocular myasthenia gravis? Does it always progress to further muscular weakness in say, the respiratory muscles eventually?

I was recently diagnosed with MG and the doctor called it ocular. Does that just mean early stages or will it stay localized with my eyes? I know it is a generally progressive disease. I just never heard it called ocular before. Thank you for any information you can share about the progression of MG and the general disease process.