Abstract
Purpose::
To evaluate the muscle changes of unilateral upper eyelid retraction (UER) in patients with dysthyroid ophthalmopathy (DO).
Methods::
Seventy five patients with unilateral UER of DO. Male 19 patients, female 56 patients, average age 40.3±14.0 (11-71) years old. The enlargements of levator and superior rectus muscles (L-S complex) were examined using coronal and sagittal sections of orbital MRI.
Results::
No enlargement of L-S complex 29eyes (38.7%)Enlargement of L-S complex 13eyes (17.3%)Levator muscle enlargement only 28eyes (37.3%)Superior rectus muscle enlargement only 5eyes (6.7%)
Conclusions::
High frequency of levator muscle enlargement was obtained in patients with unilateral UER. On the other hand, no changes of L-S complex were considered to be caused by Muller muscle. But it is difficult to explain the mechanism of unilateral appearance in case of no enlargement of L-S complex.
Keywords: eyelid • extraocular muscles: structure