Posters

Intraoperative aberrometry as quality assurance: final refraction check during cataract surgery after IOL implantation

Poster Details

First Author: T. Tandogan GERMANY

Co Author(s):    T. Neuhann   R. Neuhann   R. Khoramnia   C. Choi   G. Auffarth        

Abstract Details

Purpose:

The comparison of intra-operative aberrometry on pseudo-phakic eyes with the postoperative refraction. On this basis the benefits of intra-operative measurements in pseudo-phakic eyes are evaluated and correction factors for specific IOLs are determined.

Setting:

International Vision Correction and research Centre (IVCRC) & David J Apple Laboratory, Dept. of Ophthalmology, Heidelberg University

Methods:

Immediately after implantation of the IOL suggested by an IOL-Power calculation formula based on preoperative biometry (NIDEK AL-Scan® or IOL Master®), a measurement is performed with the intra-operative wave-front analyzer I-O-W-A® (Eyesight&Vision GmbH, Germany). The intra-operatively determined refraction is compared with the subjective follow-up results acquired at least 6 weeks after surgery. From this comparison, we infer correction factors for specific IOL types.

Results:

Systematic deviations between intra-operative aberrometry and follow-up results are documented. The deviation can be corrected by IOL-specific offsets. We found correcting offsets between 0.1 D (Bausch & Lomb Envista MX60) and 1.0 D (1stQ Basis Z hydrophil). The offsets were independent of the surgeon.

Conclusions:

The test series show that it is quite reasonable to estimate the final refraction of the patient by means of intra-operative measurement if one considers IOL-specific offsets. The offsets can be determined for each IOL type by statistics. The final refraction check gives the surgeons an opportunity to enhance the refractive outcome without an additional surgical intervention.

Financial Disclosure:

NONE