Official ESCRS | European Society of Cataract & Refractive Surgeons

Using continuous intra-operative optical coherence tomography measurements of the aphakic eye for intraocular lens power calculation

Session Details

Session Title: Cataract 1
Session Date/Time: Friday 20/02/2015 | 10:30-12:30
Paper Time: 11:28
Venue: Sadirvan B
First Author: : S.Farrokhi AUSTRIA
Co Author(s): :    N. Hirnschall   O. Findl           

Abstract Details


To compare the predictive power of intra-operative OCT measurements of the aphakic eye with conventional IOL power calculation formulae.


Hanusch hospital, Vienna, Austria.


For measuring the anterior and posterior lens capsule position intra-operatively, a prototype operating microscope with an integrated continuous optical coherence tomography device (Visante attached to OPMI VISU 200, Carl Zeiss Meditec AG), was used at four different time points. In all cases, a capsular tension ring (Morcher GmbH) was used to tauten the lens capsule. Optical biometry (Lenstar LS 900, Haag-Streit AG and IOL-Master 500 Carl Zeiss Meditec AG) was used pre-operatively, one hour, 1 day and 3 months postoperatively to assess axial eye length, ACD and lens-thickness. Furthermore, auto refraction and subjective refraction were performed at the last follow-up.


In total, 170 eyes of 170 patients were included. Feasibility of the continuous intra-operative OCT device was excellent and successful scans were performed in 96% of all cases. The predictive power of intra-operative measurements was 34.7% better for intra-operative ACD measurements compared to pre-operative measurements for IOL position and 38.5% for post-operative manifest refraction, respectively.


Intra-opertive OCT measurements showed a significantly lower axial eye length dependency compared to conventional IOL power calculation formulae. Therefore, especially short eyes would benefit from this technique.

Financial Disclosure:


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