Comparative outcomes of refractive lens-exchange treatments using optical biometry measurements obtained through combined Scheimpflug imaging and partial coherence interferometry vs swept-source optical coherence tomography

Session Details

Session Title: Presented Poster Session: Intraocular Refractive Surgery

Venue: Poster Village: Pod 2

First Author: : A.Abdul Hamid UK

Co Author(s): :    S. Vaswani   I. Siso-Fuertes   J. Dermott   A. Hartwig   C. O'Donnell           

Abstract Details

Purpose:

To report comparative predicted post-operative refraction (PPOR), unaided distance visual acuity (UDVA) and postoperative spherical equivalent refraction (SEQ) data between two groups of patients who underwent refractive lens exchange surgery (RLE). The first group had intraocular lens (IOL) powers calculated using axial length and keratometry measurements captured through a device combining partial coherence interferometry (PCI) and scheimpflug imaging, whilst the second group had biometric measurements captured through swept source optical coherence tomography (SSOCT).

Setting:

Optegra Eye Hospital London, UK

Methods:

The sample consisted of presbyopic patients who underwent elective refractive lens exchange. Intended sample size for each group will comprise 20 eyes. Patients underwent RLE surgery using a Zeiss AT LISA tri toric 939 MP IOL (Carl Zeiss Meditec, Germany) at a private eye hospital. Axial length and keratometry measurements were obtained using the Pentacam AXL (Oculus, Germany) in group 1 and the IOL Master 700 (Carl Zeiss Meditec, Germany) in group 2. Barret Toric IOL formula targeting emmetropia was used. PPOR, UDVA and post-operative SEQ values were evaluated for all eyes.

Results:

The mean postoperative SEQ, mean absolute deviation from PPOR and UDVA for groups 1 and 2 respectively were: -0.37 ± 0.60 D vs 0.07 ± 0.27 D; 0.52 ± 0.27 D vs 0.27 ± 0.22 D and 0.16 ± 0.11 logMAR vs 0.02 ± 0.15 logMAR. A statistically significant difference (p = 0.02) was found in the mean absolute deviation from PPOR which in turn lead to a statistically significant difference in post-operative SEQ and UDVA postoperatively.

Conclusions:

Preliminary results suggest that the use of the IOL Master 700 with its incorporated swept source optical coherence tomography leads to more accurate results when trifocal toric IOLs were implanted, compared with the Pentacam AXL

Financial Disclosure:

... receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented