Posters

Evaluation of intraocular lens centration early postoperatively with Scheimpflug imaging

Poster Details

First Author: P.Chang TAIWAN

Co Author(s):    C. Lian   P. Su   J. Wang   S. Chang     

Abstract Details

Purpose:

To quantify IOL tilt and decentration with scheimpflug imaging

Setting:

Observational case series

Methods:

This prospective noncomparative single-center study included patients older than 50 years old who had underwent uneventful cataract surgery and one-piece IOL implantation. Each participant underwent best-corrected visual acuity, autorefraction (Topcon KR 8900), slit-lamp and fundus examination before and after cataract surgery. We used Scheimpflug camera (Pentacam HR, Oculus) to evaluate the position of IOL at early postoperatively one week. The code written by Matlab was used to measure lens tilt and decentration.

Results:

268 eyes (139 right eyes and 129 right eyes) with mean age of 67.07± 9.6 years old were included in this study. The mean axial length was 23.65 ± 1.34 mm in the right eye and 23.61 ± 1.27 mm in the left eye. The magnitude of IOL horizontal decentration was 0.15 ± 0.11 mm in the right eye with 67.6 % decentered to the nasal side and 0.15 ± 0.11 mm in the left eye with 51.1% decentered to the nasal side. The magnitude of IOL vertical decentration was 0.15 ± 0.13 mm in the right eye with 67.6% decentered up and 0.16 ± 0.12 mm in the left eye with 72.1% decentered up. 52.5 % IOL in the right eyes and 65.1% IOLs in the left eyes were tilted upward and 88.5% IOLs in the right eyes and 98.4% IOLs in the left eyes were tilted to the temporal side. Surgical approach was significantly associated with horizontal decentration bilaterally but only significantly associated with vertical decentration in the right eye. The age or axial length was not associated with IOL tilt or decentration in both eyes.

Conclusions:

Scheimpflug imaging (Pentacam HR) can be used as a quantitative tool in IOL position evaluation. All IOLs were found tilted to the temporal side and posterior direction which was consistent with natural lens position. The way of surgical approach affected IOL position in the early postoperative period. FINANCIAL INTEREST: NONE