Right eye appears to bulge, suffer from rheumatoid arthritis. negative mri ?

Hard to say: The fact that you saw an MD & an MRI was recommended makes me wonder about your clinical findings. Was there an explanation as to why the proptosis? Do you have double vision, or decreased vision? Perhaps your eyelid have asymmetrical age related changes. The RA is likely unrelated. An ophthalmologic exam would be valuable to ascertain wether there is something wrong. A review of the MRI is impt.