title: [Investigation of the diplopia after intraocular lens implantation].
abstract: OBJECTIVE
  To investigate the pathogenesis, mechanism and prognosis of diplopia after cataract extraction with intraocular lens implantation (IOL).
  
  
  METHODS
  Besides routine ocular examinations, refraction, ocular position, ocular movement, fusional function and image of diplopia were examined on all the patients. Forced duction was examined on partial patients.
  
  
  RESULTS
  Among 24 cases with diplopia after IOL implantation, there were 19 cases of binocular diplopia and 5 cases of monocular diplopia. Of the binocular diplopia, there were 17 cases of strabismic diplopia and 2 cases of diplopia due to central fusional impairment. Of the cases with monocular diplopia, there were 4 cases resulted from operative complication and one case with congenital iridocoloboma.
  
  
  CONCLUSIONS
  The pathogenesis of strabismic diplopia resulted from dysfunction of ocular movement is unknown. Most of the patients can obtain binocular vision by early active treatment. Monocular diplopia is partly resulted from operative complication.
authors.affiliation: Department of Ophthalmology, Beijing Hospital, Beijing 100730.
authors.forename: Q
authors.initials: Q
authors.lastname: Xia
authors.forename: H
authors.initials: H
authors.lastname: Guan
authors.forename: X
authors.initials: X
authors.lastname: Guo
authors.forename: D
authors.initials: D
authors.lastname: Shen
mesh_terms: D000328:Adult; D000368:Aged; D002387:Cataract Extraction / Q000009:adverse effects*; D004172:Diplopia / Q000175:diagnosis / Q000209:etiology*; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D014792:Visual Acuity