The Impact of Femtosecond Laser on Intraocular Pressure With Cataract Surgery in Healthy Eyes.

PRCIS

Femtosecond laser-assisted cataract surgery (FLACS) leads to an increase in intraocular pressure (IOP) during the procedure and subsequent IOP reduction after surgery, with greater magnitude in eyes with higher preoperative IOP.

PURPOSE

To evaluate the effect of FLACS using the LDVZ8 laser on IOP during and after surgery, and to compare the IOP-lowering effect of FLACS and conventional phacoemulsification cataract surgery (CPCS).

PATIENTS AND METHODS

This prospective cohort study enrolled 395 healthy eyes (395 patients) scheduled for FLACS (n=245) and CPCS (n=150). FLACS was performed using the LDVZ8 laser. During FLACS, IOP was assessed before and immediately after docking. IOP reduction during a 6-month postoperative period was evaluated following FLACS and CPCS. Multivariate analyses were performed.

RESULTS

The mean IOP increase after docking was 2.3±4.1 mm Hg ( P 0.05), -1.33±3.12 mm Hg for FLACS ( P <0.001) and -1.4±2.87 mm Hg for CPCS ( P <0.001). Preoperative IOP correlated statistically significantly with IOP reduction in both FLACS (β -0.742, P <0.001) and CPCS (β -0.743, P <0.001).

CONCLUSIONS

Although the LDVZ8 laser procedure causes an increase in IOP in some healthy eyes, a subsequent decrease in IOP is observed after FLACS. The IOP-lowering effect of FLACS is similar to CPCS and tends to be more pronounced in eyes with higher preoperative IOP. Eyes with higher preoperative IOP are prone to IOP elevation during FLACS, a critical consideration for glaucoma patients.