The risk of diplopia following orbital floor and medial wall decompression in subtypes of ophthalmic Graves' disease.

We preoperatively divided 58 ophthalmic Graves' disease patients into types I and II categories before two-wall orbital decompression. Type I classification was given to patients who had no diplopia and essentially normal versions. Type II classification was assigned to patients with restrictive motility loss and diplopia within 20 degrees of the primary position.