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

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

This retrospective study, included patients who underwent conventional surgery or FLACS with hydrophobic IOL implantation.

 All eyes were examined pre and post 1 month after surgery. IOL decentration and tilt using SS-OCT (Casia2, TOMEY) and visual acuity, intraocular pressure, spherical equivalent, axial length, contrast sensitivity, satisfaction questionnaire and medical history. Internal cylinder after surgery was also measured using wavefront aberrometer (OPD-Scan III, NIDEK). The correlation factors between IOL decentration and tilt with parameters were evaluated.

Total 82 eyes of 56 patients were included. Mean IOL tilt was 5.24±1.78 degrees and decentration was 0.31±0.16mm. In all parameters, post-operative IOL tilt, surgery type, post-operative internal cylinder, baseline visual acuity showed significant correlation to decentration and pre-operative lens diameter and pre-operative lens tilt, post-operative IOL decentration, baseline visual acuity showed significant correlation to IOL tilt, other factors were not correlated to IOL decentration or tilt. 55 eyes (67.1%) underwent FLACS, and this group showed mean decentration of 0.23±0.15mm and tilt of 4.99±1.6 degrees. 

FLACS group showed significantly better to conventional surgery group in decentration, but no significant difference in tilt (0.35±0.15mm, 5.37±1.88 degree, p=.04, p=.458), visual acuity after surgery showed no significant difference between two groups. FLACS showed better decentration and tilt of IOL after 1 month of surgery. But, IOL decentration and tilt did not affect visual acuity after 1 month