title: Outcomes with the Boston Type 1 Keratoprosthesis at Instituto de Microcirugía Ocular IMO.
abstract: OBJECTIVE
  To report the outcomes on the Boston Type 1 Keratoprosthesis at our institution.
  
  
  METHODS
  Retrospective analysis case series.
  
  
  METHODS
  We analyzed 54 eyes of 53 patients who previously underwent Boston Type 1 Keratoprosthesis surgery at our institution from July 2006 to March 2011.
  
  
  METHODS
  Preoperative and postoperative parameters were collected and analyzed.
  
  
  METHODS
  Visual acuity and keratoprosthesis stability.
  
  
  RESULTS
  Common preoperative diagnoses were penetrating keratoplasty failure in 49 eyes (90.7%), chronic keratitis in 2 eyes (3.7%), ocular cicatricial pemphigoid in 1 eye (1.85%), Stevens Johnson syndrome in 1 eye (1.85%) and corneal vascularization in 1 eye (1.85%). Additionally, 40 eyes (74%) had preoperative glaucoma, and an Ahmed valve was implanted in 55% of them. Preoperative BCVA ranged from 20/200 to light perception. At an average follow-up of 20.15 months ± 12.7 (range, 1-56), postoperative vision improved to ⩾20/200 in 18 eyes (33.3%) and ⩾20/50 in 4 eyes (7.4%). The graft retention was 96%.
  
  
  CONCLUSIONS
  The Boston Type 1 keratoprosthesis is a valid option for high-risk patients. The design improvements in the Boston keratoprosthesis, as well as the daily implementation of the therapeutic methods, have notably diminished occurrence of the most serious complications, such as corneal necrosis and endophthalmitis. As such, glaucoma and its subsequent complications now stand as the most prevalent prognostic factor in the long term.
authors: Instituto Microcirugia Ocular of Barcelona, Josep Maria Llado 3, 08035 Barcelona, Spain.
authors: Jose L
authors: JL
authors: Güell
authors: Edilio
authors: E
authors: Arcos
authors: Oscar
authors: O
authors: Gris
authors: Diego
authors: D
authors: Aristizabal
authors: Miguel
authors: M
authors: Pacheco
authors: Claudia L
authors: CL
authors: Sanchez
authors: Felicidad
authors: F
authors: Manero
keywords: Boston Type 1 Keratoprosthesis; Corneal necrosis; Instituto de Microcirugía Ocular IMO; Ocular cicatricial pemphigoid; Stevens Johnson syndrome; Visual acuity
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