The Analysis Of Iol Decentration And Tilt After Conventional And Femtosecond Laser-Assisted Cataract Surgery Using Swept-Source Anterior Oct

To evaluate and compare the magnitude of intraocular lens (IOL) decentration and tilt after conventional and femtosecond laser-assisted cataract surgery (FLACS) using swept-source anterior optical coherence tomography (SS-OCT)

The retrospective study was done for patients who had conventional cataract surgery or FLACS with implantation of hydrophobic 1-piece monofocal IOL. 

The magnitude of IOL decentration and tilt obtained from the SS-OCT (Casia2, TOMEY), visual acuity, intraocular pressure, spherical equivalent, axial length, contrast sensitivity, and satisfaction questionnaire were evaluated before and 1-month after cataract surgery. Additionally, the internal cylinder was measured after the surgery using a wavefront aberrometer (OPD-Scan III, NIDEK). Correlation factors between each parameter and IOL decentration or tilt were also analyzed.

A total of 82 eyes from 54 patients were enrolled. Mean IOL decentration and tilt were 0.29±0.15mm and 5.29±1.59degrees. Type of surgery (p=0.004), postoperative internal cylinder (p=.003), and postoperative tilt (p=.005) had significant correlation with decentration, and preoperative tilt (p=.001) was the only factor that showed correlation with tilt. Fifty-five eyes who underwent FLACS showed mean decentration of 0.23±0.14 mm and tilt of 5.21±1.64 degrees. When compared with the conventional surgery group, there was a significant difference in decentration (0.32±0.14mm, p=.028), but not in tilt (5.43±1.53 degrees, p=.616). Visual acuity after surgery had no significant difference between the two groups.

FLACS had better results of IOL decentration and tilt compared with conventional cataract surgery after 1-month of surgery. Differences in IOL decentration and tilt did not affect postoperative visual acuity.