Intraoperative and postoperative anterior chamber depth changes using a continuous intraoperative optical coherence tomography device

Session Details

Session Title: Cataract Surgery Equipment. Cataract Surgery Outcomes

Session Date/Time: Monday 07/09/2015 | 16:30-18:30

Paper Time: 17:34

Venue: Main Auditorium

First Author: : S.Farrokhi AUSTRIA

Co Author(s): :    N. Hirnschall   O. Findl                 

Abstract Details

Purpose:

To evaluate cornea lens capsule distance (CCD) changes during cataract surgery using continuous intra-operative optical coherence tomography and its predictive power for post-operative changes of the intraocular lens position.

Setting:

Hanusch hospital, Vienna, Austria

Methods:

This prospective study included patients scheduled for cataract surgery. A prototype operating microscope with an integrated continuous optical coherence tomography (OCT) device (CZM AG, Germany) was used to measure the distance between the corneal endothelium and the anterior lens capsule (CCD) at the beginning of surgery, in the aphakic state and in the pseudophakic state. Two different designs of IOLs were used, an open loop haptic IOL (ZCB00, AMO, USA) and a plate haptic IOL (Asphina, CZM). Optical biometry (Lenstar LS 900, Haag-Streit AG, Switzerland and IOLMaster 700, CZM) was performed pre-operatively, 1 hour, 1 day and 2 months postoperatively.

Results:

In total, 203 eyes of 203 patients were included. Feasibility of the continuous intra-operative OCT device was excellent and successful scans were performed in 96% of all cases. Intra-operative measurements were significantly superior for IOL position prediction compared to pre-operative ACD measurements. Mean pre-operative axial eye length and ACD were 23.49mm (SD: 1.47; 20,56 to 29.46) and 2.98 mm (SD: 0.45; 1.93 to 4.11), respectively. Mean intra-operative CCD in the aphakic state was 4.02mm (SD:0.4; 2.8 to 5.68). The IOL design had no significant influence on the predictive power of the intra-operative measurements.

Conclusions:

Intra-operative CCD measurements were shown to be a significantly better predictor for the post-operative IOL position compared to the pre-operatively measured ACD. This applies for open-loop, as well as for plate haptic IOLs.

Financial Interest:

NONE