Supernumerary orbital muscle in congenital eyelid retraction.
OBJECTIVE
Although several reports of supernumerary orbital muscles related to the levator palpebrae superioris have been published, no case has been associated with congenital eyelid retraction. This report describes an apparent causal relationship between an accessory levator muscle slip and congenital eyelid retraction.


METHODS
Case report and literature review.


RESULTS
Release of the anomalous muscle's attachment from the superior tarsal border alone resulted in resolution of the eyelid retraction.


CONCLUSIONS
Eyelid muscle anomalies may be a cause of congenital eyelid retraction. Ophthalmologists who treat eyelid disorders should be aware of this possibility when evaluating and operating on patients with congenital eyelid retraction.
Wylen
E L
EL
Department of Ophthalmology, University of South Alabama Medical Center, Mobile 36689-0448, USA.
Brown
M S
MS
Rich
L S
LS
Hesse
R J
RJ
D002675:Child, Preschool; D005124:Eye Abnormalities / Q000150:complications* / Q000601:surgery; D005141:Eyelid Diseases / Q000151:congenital* / Q000209:etiology* / Q000601:surgery; D006801:Humans; D008297:Male; D009801:Oculomotor Muscles / Q000002:abnormalities* / Q000601:surgery; D009915:Orbit / Q000473:pathology