title: When straight eyes won't move: phenotypic overlap of genetically distinct ocular motility disturbances.
abstract: OBJECTIVE
  To describe the phenotypic similarity in a series of patients with genetically distinct ocular motility disturbances involving straight eyes and different ocular motor pathology.
  
  
  METHODS
  Retrospective case series.
  
  
  METHODS
  Clinical and genetic evaluation of 5 patients with straight eyes in the primary position and abnormalities of ocular motility.
  
  
  RESULTS
  Patients with oculopharyngeal muscular dystrophy, congenital myasthenic syndrome, congenital fibrosis of the extraocular muscles type 3, Bosley-Salih-Alorainy syndrome, and horizontal gaze palsy and progressive scoliosis all had straight eyes in primary position and restricted ocular motility. History, ocular motility patterns, systemic features of individual syndromes, and genetic screening were important diagnostically.
  
  
  CONCLUSIONS
  A number of congenital and genetic ocular motility syndromes may result in substantial phenotypic overlap, particularly when eyes are straight in primary position and nonophthalmologic features are not apparent or not observed. The range of disorders that may fall into this category is discussed.
authors.affiliation: Department of Ophthalmology, College of Medicine, King Saud University, Riyadh, Saudi Arabia. darrenoystreck@ymail.com
authors.forename: Darren T
authors.initials: DT
authors.lastname: Oystreck
authors.forename: Mustafa A
authors.initials: MA
authors.lastname: Salih
authors.forename: Thomas M
authors.initials: TM
authors.lastname: Bosley
mesh_terms: D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D005133:Eye Movements / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015835:Ocular Motility Disorders / Q000175:diagnosis* / Q000235:genetics* / Q000503:physiopathology; D010641:Phenotype; D012189:Retrospective Studies; D015348:Vision, Binocular / Q000502:physiology