Comparative Analysis Of Long-Term Intraocular Lens Decentration And Visual Outcomes Of Femtosecond Laser-Assisted Cataract Surgery Versus Conventional Cataract Surgery

To evaluate the long-term effects of Intraocular lens (IOL) centration after femtosecond laser-assisted cataract surgery (FLACS)

Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea

This retrospective study, including patients underwent FLACS or conventional cataract surgery with more than one year have passed after surgery. Total 88 eyes of 67 patients with FLACS and 66 eyes of 45 patients with conventional cataract surgery were included. Best corrected visual acuity (BCVA), intraocular pressure (IOP), refractive error, pre-operative biometry, IOL decentration and tilt was reviewed. IOL centration was evaluated with swept-source optical coherence tomographic (OCT) (Casia2). 

Mean postoperative duration was 27.8±9.3 months in the FLACS patient group, and 30.5±11.2 months in the control group. There was no significant difference in BCVA, IOP, refractive error, and anterior chamber depth and axial length between the two groups. The average IOL decentration in FLACS patient group was 0.17 mm (0.08–0.28), while conventional patient group was 0.27 mm (0.05–0.69) with significant differences (p<0.01). There was no significant difference in IOL tilt, tilt axis, and decentration axis. Also, subgroup analysis in the conventional patient group by haptic type, no significant difference between the one-piece IOL and the three-piece IOL groups in in both IOL decentration (0.24 vs 0.34, p=.177) and tilt (4.0 vs 4.1, .971).

FLACS group and conventional cataract surgery group showed similar results in long term after surgery. But FLACS group showed better results in IOL centration than conventional cataract surgery group.