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EXPERIENCE WITH A PMMA KERATOPROSTHESIS AT THE FEDERAL UNIVERSITY OF SAO PAULO, BRASIL

EXPERIENCE WITH A PMMA KERATOPROSTHESIS AT THE FEDERAL UNIVERSITY OF SAO PAULO, BRASIL. Oliveira LA, M.D; Sousa LB, M.D; Hofling-Lima AL, M.D; Freitas D, M.D; Belfort R Jr, M.D. Authors have no financial interest. PURPOSE.

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EXPERIENCE WITH A PMMA KERATOPROSTHESIS AT THE FEDERAL UNIVERSITY OF SAO PAULO, BRASIL

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  1. EXPERIENCE WITH A PMMA KERATOPROSTHESIS AT THE FEDERAL UNIVERSITY OF SAO PAULO, BRASIL Oliveira LA, M.D; Sousa LB, M.D; Hofling-Lima AL, M.D; Freitas D, M.D; Belfort R Jr, M.D. Authors have no financial interest.

  2. PURPOSE • To report the Federal University of São Paulo experience with a PMMA keratoprosthesis(Boston Type I)

  3. METHODS • Study design: chart review of 16 eyes of 16 patients who underwent Boston type I K-pro surgery between 2008 and 2010 • Preoperative, intraoperative, and postoperative parameters were analyzed, including visual acuity and keratoprosthesis stability • All surgeries were performed by the same surgeon: LAO

  4. RESULTS • Preoperative diagnosis - Chemical injury: 8 eyes (50%) - Failed graft: 8 eyes (50%) • Preoperative glaucoma - 9 eyes (56.25%) • Preoperative BCVA - ranged from 20/400 – light perception

  5. RESULTS • Average follow-up - 17 months (1-25m) • Postoperative visual acuity - ≥ 20/200: 75% - ≥ 20/200: 70% (at least 1 year postop) - ≥ 20/40: 30% (at least 1 year postop) • Retention rate - 93.75% (mean follow-up 17 months)

  6. MAIN COMPLICATIONS • Retroprosthetic membrane - 4 eyes (25%) • IOP increase - 4 eyes (25%) • Retinal detachment - 1 eye (6.25%) • Infection (keratitis) - 1 eye (6.25%) • Extrusion - 1 eye (6.25%)

  7. TABLE OF RESULTS

  8. CONCLUSIONS • This PMMA keratoprosthesis is a viable option in conditions with a poor prognosis for primary keratoplasty as in chemical injury and multiple keratoplasty failures • The UNIFESP experience seems equivalent to previous reports regarding the complications rates as well as the anatomic and functional outcomes. Zerbe BL. Ophthalmology 2006. Bradley J. Cornea 2009.

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