A femtosecond laser (Alcon-Lensx, Alcon-Lensx, Inc.) was used in this study. After pupil dilation and topical anesthesia, the laser was docked to the eye using a curved contact lens to applanate the cornea. With the integrated OCT imaging system, the locations of the cornea and the anterior and posterior surfaces of the crystalline lens were determined. A 5.0-mm-diameter capsulotomy was created by scanning a cylindrical pattern and followed by lens fragmentation. The laser was disconnected, and the remainder of the surgery was performed as phacoemulsification (Infiniti® Vision System; Alcon, USA). Folded intraocular lenses (IOLs) were implanted in the capsular bags.

The subfoveal choroidal thickness were measured at baseline and at 1 day, 7 days , 1 month , and 3 months postoperatively by spectral-domain optical coherence tomography.

The subfoveal retinal thickness were measured at baseline and at 1 day, 7 days , 1 month , and 3 months postoperatively by spectral-domain optical coherence tomography.