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Comparison and evaluation of the intraoperative and preoperative axial eye length measurements using optical coherence tomography

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First Author: J.Hienert AUSTRIA

Co Author(s):    S. Amir-Asgari   N. Hirnschall   B. Döller   M. Ruiß   M. Ullrich   O. Findl     

Abstract Details

Purpose:

Comparison of axial eye length measurements using intra-operative optical coherence tomography of the aphakic eye and comparison with pre-operative measurements.

Setting:

Vienna Institute for Research in Ocular Surgery (VIROS), a Karl-Landsteiner-Institute, Hanusch Hospital, Vienna.

Methods:

To assess the axial eye length patient got measured bevor cataract surgery using swept-source optical coherence tomography (ss-OCT, IOLMaster 700, Carl Zeiss Meditec AG, Jena, Germany) to assess the axial eye length. Intra-operatively, ssOCT measurements were performed with a prototype device (IOLMaster 700 connected to an OPMI Lumera 700 microscope, CZM) at the beginning of cataract surgery and furthermore, of the aphakic and the pseudophakic eye. Measurements were then repeated 2 months after surgery with the IOMaster 700 and other devices. For the study only one eye of the study patient was included.

Results:

In total, 59 eyes of 59 patients were analysed. The mean absolute difference was 0.035 mm. The relative difference was <0.001 mm (SD: 0.0007). Limits of agreement were ±0.065 mm.

Conclusions:

Intra-operative swept source OCT technology of the phakic eye shows excellent feasibility and high comparability to pre-operative measurements. Therefore, this technique allows axial eye length measurements high precision and could help to attain better refractive outcomes in cases of dense cataracts and special patient groups with difficulties of performing pre-operative biometry, such as small children.

Financial Disclosure:

... receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented, ... research is funded, fully or partially, by a competing company, ... 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 competing company