by means of an assay which detects ophthalmopathic immunoglobulin ( oig ) in patients ' serum with an antigen prepared from porcine retro-orbital muscle , levels of oig above the normal reference range were found in 21 of 33 ( 64 % ) patients with active untreated ophthalmopathy , in 3 of 12 ( 25 % ) with active disease already receiving steroid treatment , and in 3 of 18 ( 16 % ) with longstanding inactive eye disease .
C0015397
ophthalmopathy
C0015392
eye