Anterior chamber intraocular lens for high myopia - Five year results

Purpose; To evaluate the effectiveness of the surgical correction of high myopia 5 years after anterior chamber intraocular lens (IOL) implantation and to analyze the lens position and related complications,Setting: Federal University of Sk Paulo-Escola Paulista de Medicina, Sao Paulo, Brazil..Methods: This prospective study comprised 26 eyes that were implanted with an anterior chamber IOL (model ZB5M) and had a minimum follow-up of 5 years. Before and after surgery, manifest and cycloplegic refractions were done; slitlamp examination was performed; anterior chamber depth was measured; and keratometry, ophthalmoscopy, and central corneal endothelial cell count were performed. At the last follow-up, computerized biomicroscopy of the anterior segment was also done.Results: The spherical equivalent decreased from - 16.5 diopters (D) +/- 4.1 (SD) preoperatively to -0.9 +/- 0.9 D postoperatively, At the last examination, 57.7% of eyes had a spherical equivalent refraction within +/-1.0 D of emmetropia. Of eyes with a preoperative best spectacle-corrected visual acuity of 20/40 or better, 73.3% had an uncorrected visual acuity of 20/40 or better postoperatively, The mean tilt caused by the IOL was 4.4 +/- 2.7 degrees (range 0.5 to 12.2 degrees) and the mean IOL decentration, 0.3 +/- 0.2 mm (range 0.02 to 0.8 mm). The mean decrease in the endothelial cell count was 1.5%, with a mean cell density of 2808 +/- 305 cells/mm(2) preoperatively and 2765 +/- 242 cells/mm(2) postoperatively. Pupillary ovalization was observed in 12 eyes (46.1%).Conclusions: The anterior chamber IOL safely and effectively corrected high myopia. J Cataract Refract Surg 2001; 27:1248-1253 (C) 2001 ASCRS and ESCRS.Univ Fed Sao Paulo, EPM, Refract Surg Unit, Sao Paulo, BrazilUniv Fed Sao Paulo, EPM, External Eye Dis Unit, Dept Ophthalmol, Sao Paulo, BrazilUniv Fed Sao Paulo, EPM, Dept Ophthalmol, Cataract Inst, Sao Paulo, BrazilUniv Fed Sao Paulo, EPM, Dept Ophthalmol, Eye Clin, Sao Paulo, BrazilUniv Fed Sao Paulo, EPM, Refract Surg Unit, Sao Paulo, BrazilUniv Fed Sao Paulo, EPM, External Eye Dis Unit, Dept Ophthalmol, Sao Paulo, BrazilUniv Fed Sao Paulo, EPM, Dept Ophthalmol, Cataract Inst, Sao Paulo, BrazilUniv Fed Sao Paulo, EPM, Dept Ophthalmol, Eye Clin, Sao Paulo, BrazilWeb of Scienc