title: Inferolateral migration of hydrogel orbital implants in microphthalmia.
abstract: OBJECTIVE
  Hydrogel spheres may be useful in treating orbital hypoplasia associated with congenital microphthalmia. The authors describe migration associated with the use of these devices.
  
  
  METHODS
  The authors retrospectively reviewed 5 cases in which a hydrogel orbital expander (Osmed) was implanted to treat orbital hypoplasia in pediatric patients with congenital microphthalmia (with or without previous surgery).
  
  
  RESULTS
  In all 5 cases, a lateral orbitotomy, conjunctiva-sparing approach was used to insert the hydrogel spheres. Two cases involved previously unoperated orbits; 3 patients had prior orbit or socket surgery. Inferolateral movement outside the desired central, deep orbital position occurred in all 5 cases. Four of 5 cases required further procedures to achieve an adequate orbital implant position.
  
  
  CONCLUSIONS
  Inferolateral migration may occur with hydrogel spheres implanted via a lateral orbitotomy approach in microphthalmia.
authors.affiliation: Department of Ophthalmology, University of California, Irvine, California 92697, USA. j.tao@uci.edu
authors.forename: Jeremiah P
authors.initials: JP
authors.lastname: Tao
authors.forename: Russell M
authors.initials: RM
authors.lastname: LeBoyer
authors.forename: Kathy
authors.initials: K
authors.lastname: Hetzler
authors.forename: John D
authors.initials: JD
authors.lastname: Ng
authors.forename: William R
authors.initials: WR
authors.lastname: Nunery
mesh_terms: D002648:Child; D002675:Child, Preschool; D005548:Foreign-Body Migration / Q000209:etiology*; D006801:Humans; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D007223:Infant; D008297:Male; D008850:Microphthalmos / Q000601:surgery*; D009915:Orbit / Q000002:abnormalities / Q000601:surgery; D020273:Orbital Implants; D011183:Postoperative Complications; D019919:Prosthesis Implantation; D012189:Retrospective Studies; D015625:Tissue Expansion Devices
chemical_list: D020136:Hydrogel, Polyethylene Glycol Dimethacrylate