Comparison of Surgical Parameters Using Different Lens Fragmentation Patterns in Eyes Undergoing Refractive Laser–Assisted Cataract Surgery

Monday, April 20, 2015: 1:43 PM
Room 5A (San Diego Convention Center)
Harvey S. Uy, MD

To evaluate and compare surgical parameters and safety among eyes undergoing refractive laser-assisted cataract surgery (RELACS) using different lens fragmentation patterns (LFP).

Prospective open clinical trial of  31 consecutive eyes undergoing RELACS using a single femtosecond laser (Lensar)  but different LFP:   Group A, 3-plane chop  (n = 15); Group B: 3-plane chop plus pie-cut pattern (n = 16).   Group C  (controls) underwent conventional phacoemulsification (PE) (n=19).  All surgeries were performed using a 3-plane prechop technique, by the same surgeon and PE machine (Centurion, Alcon Surgica).  Main outcome measures:  Pentacam-graded nuclear density, mean PE time, mean PE power, mean cumulative dissipated energy (CDE), mean BSS fluid volume, mean operative time and adverse events. ANOVA and chi-square analyses.

Ongoing study. We present here the results of the first 50 eyes; results will be updated.  All eyes underwent successful cataract surgery using the femtosecond laser platform.  The 3 groups were comparable in terms of nuclear density (P = 0.760), PE power (P=0.116),  BSS fluid volume (P=0.364) and operative time (P=0.999).  Compared to Group C (controls), Group B (3-plane plus pie-cut pattern) surgeries utilized significantly less PE time (P=0.017) and  CDE (P=0.002).  No adverse events were observed in all groups on the first postoperative day.

The FS laser was safe and effective for cataract surgery.  Compared to conventional PE,  RELACS with 3-plane chop plus pie-cut pattern utilized less PE time and CDE.  The 3-plane chop plus pie-cut pattern was more efficient compared to 3-plane chop alone.  The clinical benefits of these differences should be investigated.