Using intraoperative swept-source optical coherence tomography measurements of the aphakic eye to predict the postoperative intraocular lens position

Session Details

Session Title: Anterior Segment Imaging I

Session Date/Time: Monday 24/09/2018 | 16:30-18:00

Paper Time: 16:36

Venue: Room A4

First Author: : S.Amir-Asgari AUSTRIA

Co Author(s): :    N. Hirnschall   J. Hienert   H. Matz   C. Hauger   J. Steffen   O. Findl     

Abstract Details

Purpose:

To evaluate intra-operative anterior chamber depth (iACD) measurements of the aphakic eye using a novel swept source optical coherence tomography (OCT) device to predict the post-operative anterior chamber depth (ACD).

Setting:

Hanusch hospital, Vienna, Austria

Methods:

This prospective study included patients scheduled for cataract surgery. Pre-operatively, optical biometry was performed (IOLMaster 700, CZM). Intra-operatively, a device was used that allowed to perform swept source OCT scans of the anterior lens capsule during surgery (IOLMaster700 connected with OPMI Lumera 700, both CZM). The position of the anterior lens capsule of the aphakic eye was measured and used to predict the post-operative ACD. Post-operative measurements were performed 1 hour, 1 day and 2 months post-operatively. Optical biometry was repeated at all follow-ups and subjective refraction and autorefraction (Topcon RM 8800, Topcon, Japan) were performed 2 months post-operatively.

Results:

In total, 66 eyes of 66 patients were included. Repeatability of intra-operative aphakic measurements was good with a mean absolute difference of 0.035 mm (SD: 0.033) and limits of agreement of 0.064 mm. Partial least squares regression for ACD prediction at the three-month follow-up was better for iACD measurements (VIP=1.065) than for pre-operative ACD measurements (0.930). These differences were more pronounced for the prediction of the manifest refraction 3 months after surgery (iACD 1.757 vs pre-operative ACD 0.993). The boot strapping model confirmed the superiority of the iACD measurements.

Conclusions:

iACD measurements were shown to be superior to pre-operative ACD measurements. The novel intra-operative swept source OCT improved feasibility significantly compared to the previously introduced intra-operative time-domain OCT. Furthermore, this study showed that it is not necessary to use a capsular tension ring for iACD measurements.

Financial Disclosure:

... is employed by a for-profit company with an interest in the subject of the presentation, ... research is funded, fully or partially, by a company producing, developing or supplying the product or procedure presented, ... receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented