title: Modified muscle transposition procedure for a case of inferior rectus muscle aplasia.
abstract: OBJECTIVE
  We report a case of inferior rectus muscle aplasia in a 65-year-old woman.
  
  
  METHODS
  Images were obtained using ocular motility photography and magnetic resonance imaging (MRI), and operative findings were analyzed.
  
  
  RESULTS
  A 65-year-old woman presented with marked right hypertropia. The right eye also had microcornea, iris coloboma, and completely restricted downward movement. MRI showed absence of the inferior rectus muscle in both eyes. During surgery, it was confirmed that the right inferior rectus muscle was absent. The patient underwent a muscle transposition procedure without tenotomy or muscle splitting. A superior rectus muscle tenotomy was also performed. Postoperatively, the right eye showed hypotropia and improved downward movement.
  
  
  CONCLUSIONS
  Muscle transposition without tenotomy or tendon splitting is a surgical option for the unusual abnormality presented in this paper.
authors: Department of Ophthalmology, Jichi Medical University, Shimotsuke, Japan.
authors: Shinji
authors: S
authors: Makino
authors: Department of Ophthalmology, Jichi Medical University, Shimotsuke, Japan.
authors: Kozue
authors: K
authors: Hozawa
authors: Department of Ophthalmology, Jichi Medical University, Shimotsuke, Japan.
authors: Reiko
authors: R
authors: Kondo
authors: Department of Ophthalmology, Jichi Medical University, Shimotsuke, Japan.
authors: Mika
authors: M
authors: Kanai
authors: Department of Ophthalmology, Jichi Medical University, Shimotsuke, Japan.
authors: Haruko
authors: H
authors: Suto
authors: Department of Ophthalmology, Jichi Medical University, Shimotsuke, Japan.
authors: Go
authors: G
authors: Mawatari
authors: Department of Ophthalmology, Jichi Medical University, Shimotsuke, Japan.
authors: Kanako
authors: K
authors: Ito
keywords: Aplasia of the inferior rectus muscle; Magnetic resonance imaging; Muscle transposition procedure