Secondary intraocular lenses in eyes with aphakia or dislocated IOL: impact of suture fixation on early and late complications

BACKGROUND: Secondary intraocular lens (IOL) implantation is exposed to an increased risk of complications, including endophthalmitis and retinal detachment. The present analysis compares the outcomes and complications experienced in our own series of patients. PATIENTS AND METHODS: We retrospectively reviewed a consecutive series of secondary posterior chamber IOL implantations performed in a single centre, two surgeon setting over a period of 8 years and with a follow up-time of at least 4 months. RESULTS: Between 1997 and 2005, 75 patients received a sulcus-supported secondary IOL without suture fixation, whereas suture fixation was required in 137 instances. Visual acuity improved in both groups (group 1: from 0.36 +/- 0.39 (0.01-1.2) to 0.73 +/- 0.33 (0.02-1.0; p = 0.18); group 2: from 0.33 +/- 0.34 (0.02-1.0) to 0.46 +/- 0.33 (0.01-1.0; p = 0.006), but more pronounced in eyes not requiring suture fixation (p = 0.012). IOL placement was more likely to be combined with endophacoemulsification in the not suture-fixed IOLs (12.7 vs. 5.3 %). In contrast, retinal tears (10.6 vs. 8.6 %, respectively) and retinal detachment (5.3 vs. 2.2 %, respectively) were equally distributed. In the early postoperative phase, IOP was lower in suture-fixed eyes, which showed a higher incidence of minor intraocular haemorrhages and cystoid macular edema (5.3 vs. 8.0 %); late complications up to 5 years postoperatively were equally distributed. CONCLUSION: A preoperatively less complicated anterior segment situation and a lower incidence of postoperative macular edema may account for a better visual outcome after placement of a sulcus supported IOLs without suturing. If required, suture fixation may be performed without exposing the eye to an increased risk of late postoperative complications.