Clinical and biometric determinants of effective lens position after cataract surgery

Session Details

Session Title: IOL Power Calculations

Session Date/Time: Sunday 11/09/2016 | 16:00-18:00

Paper Time: 16:00

Venue: Hall C2

First Author: : D.Hoa FRANCE

Co Author(s): :    J. Plat   F. Mura   T. Busetto   A. Payerols   M. Villain   V. Daien     

Abstract Details

Purpose:

We aimed to investigate the clinical and biometric factors associated with ELP after cataract surgery.

Setting:

Effective lens position (ELP) in the capsular bag is one of the main issues in refractive outcomes after cataract surgery.

Methods:

This was a single-center prospective study conducted in the University Hospital of Montpellier, France in patients who underwent uncomplicated phacoemulsification. Clinical factors (age, sex, history, pre-operative refraction, keratometry, vitreous status) and biometric factors (axial length, pachymetry, anterior chamber depth, lens thickness, white-to-white distance) which may affect ELP were collected. Each patient underwent optical biometry preoperatively and 1 month postoperatively. ELP was measured by the C constant. The power and type of IOL were used to stratify patients into 3 groups: SN60WF or SN6AT (toric) (Alcon®); ZCB00 or ZCT (toric) (Abbott®); and Asphina 409 MV (Zeiss®).

Results:

We included 244 eyes from 181 patients (mean age 73.1 ± 9.3 years). The C constant was 0.38 ± 0.04, 0.44 ± 0.05, 0.39 ± 0.06 for the IOLs Alcon® (n=85 eyes), Abbott® (n=84 eyes), and Zeiss® (n=75 eyes) groups, respectively. In the overall population anterior chamber depth (ACD) and anterior segment depth (ASD) were correlated with ELP (overall r = -0.44, p <0.0001; r = -0.31, p <0.0001, respectively). ELP was not correlated with age, sex, refraction, keratometry findings, white-to-white distance, axial length, or vitreous status. The observed relations between ACD, ASD and ELP remained significant after adjusting for potential confounding factors.

Conclusions:

We found ACD and ASD correlated with ELP. The integration of these data in IOL formulas could help to improve refractive outcomes after cataract surgery.

Financial Disclosure:

NONE