Implantation of the black diaphragm intraocular lens in congenital and traumatic aniridia.

OBJECTIVE: To evaluate the biometry accuracy, visual outcomes, and long-term changes in intraocular pressure after implantation of the black diaphragm intraocular (BDI) lens in cases of aniridia. DESIGN: Retrospective, interventional case series. PARTICIPANTS: Forty eyes of 35 patients with aniridia (15 eyes of congenital origin and 25 as a result of trauma). METHODS: Patient demographics, clinical evolution, and treatment were analyzed for each case undergoing implantation with the Morcher 67F BDI lens (Morcher GmBH, Stuttgart, Germany). MAIN OUTCOME MEASURES: Biometry accuracy, visual outcome, and the development of glaucoma and other complications in these eyes over a mean of 3.5 years. RESULTS: Using the recommended A constant of 118.7, the mean biometry prediction error was -0.12+/-0.44 diopters (D), with a mean absolute error of 1.47+/-0.29 D, equivalent to 80% of target eyes being within 2 D of predicted refraction. The prevalence of glaucoma increased from 10 (25%) of 40 eyes before surgery, to 22 (55%) of 40 eyes at 1 year after surgery. The best-corrected visual acuity in logarithm of the minimum angle of resolution (logMAR) units improved significantly in the 25 eyes with traumatic aniridia, from 1.34+/-0.22 to 0.54+/-0.16 (20/400 to 20/70; P