title: Rectus muscle trauma complicating sub-Tenon's local anaesthesia.
abstract: OBJECTIVE
  To describe three cases of rectus muscle trauma in patients undergoing phacoemulsification cataract extraction and intraocular lens implantation under sub-Tenon's local anaesthesia via the inferonasal quadrant.
  
  
  METHODS
  Retrospective review was carried out of 3 cases from 1080 patients who underwent phacoemulsification cataract extraction and intraocular lens implantation under sub-Tenon's local anaesthesia in our unit over a 3 year period up to April 2000.
  
  
  RESULTS
  Two patients complained postoperatively of vertical diplopia and were shown to have restriction of elevation of the eye, which was found at surgical exploration to be due to inferior rectus muscle restriction. One patient had post-operative horizontal diplopia due restriction of abduction and exploration of the medial rectus muscle was planned.
  
  
  CONCLUSIONS
  Rectus muscle trauma is proposed as a complication of sub-Tenon's local anaesthesia and caution is advised to operators to clearly identify the sub-Tenon's space for injection of local anaesthetic.
authors.affiliation: Department of Ophthalmology, Cheltenham General Hospital, UK.
authors.forename: P D
authors.initials: PD
authors.lastname: Jaycock
authors.forename: C M
authors.initials: CM
authors.lastname: Mather
authors.forename: J D
authors.initials: JD
authors.lastname: Ferris
authors.forename: J N
authors.initials: JN
authors.lastname: Kirkpatrick
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000772:Anesthesia, Local / Q000009:adverse effects* / Q000379:methods; D004172:Diplopia / Q000209:etiology; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular / Q000009:adverse effects; D009801:Oculomotor Muscles / Q000293:injuries*; D018918:Phacoemulsification / Q000379:methods*; D012189:Retrospective Studies; D013285:Strabismus / Q000209:etiology*