Bilateral absence of the inferior rectus muscle presenting with pseudoptosis: treatment of a novel presentation.
Isolated bilateral absence of the inferior rectus muscle is a rare congenital anomaly. The usual presentation of this disorder involves apparent ocular deviations and abnormal head posture from an early age. A 45-year-old woman presented with a bilateral ptosis and lower scleral show. She had a limitation of infraduction in both eyes but was orthophoric in the primary position and had a normal head posture. Ocular motility testing and imaging confirmed a diagnosis of bilateral absence of the inferior rectus muscle; the ptosis was assumed to be a pseudoptosis. The inferior half of the horizontal rectus muscles was transposed inferiorly in both eyes. Postoperatively there was marked improvement of the bilateral ptosis and lower scleral show.
Department of Ophthalmology, Chungnam National University Hospital, Daejeon, Korea.
Sung-Bok
SB
Lee
Department of Ophthalmology, Chungnam National University Hospital, Daejeon, Korea.
Yong-Joon
YJ
Yoon
Department of Ophthalmology, Chungnam National University Hospital, Daejeon, Korea. Electronic address: yeonheelee72@gmail.com.
Yeon-Hee
YH
Lee
D001763:Blepharoptosis / Q000175:diagnosis* / Q000628:therapy; D005133:Eye Movements; D005260:Female; D006257:Head; D006801:Humans; D008875:Middle Aged; D009801:Oculomotor Muscles / Q000473:pathology*; D011187:Posture