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Session Title: Multifocal Technology and Comparative studies
Session Date/Time: Tuesday 08/10/2013 | 08:00-10:30
Paper Time: 10:09
Venue: Auditorium (First Floor)
First Author: : R.Al-Saady THE NETHERLANDS
Co Author(s): : J. Van der Linden V. Vrijman I. Van der Meulen R. Lapid-Gortzak
To evaluate whether the automated refraction (AR) correlates with subjective manifest (MR) refraction in eyes implanted with radially asymmetric multifocal intraocular lenses (IOLs).
Retina Total Eye Care, Private refractive surgery clinic, Driebergen, the Netherlands.
This retrospective study evaluated 98 eyes (52 patients) implanted with a radially asymmetric multifocal IOL (LS-312 MF30, Oculentis, Germany). At 3 months post-operatively the AR and MR values were compared in order to determine the correlation between the sphere (S), the spherical equivalent (SE), and the astigmatic components J0 and J45.
The difference of mean spherical measurement was 0.99D, with the AR measuring more myopic. The difference of the mean spherical equivalent was 1.13D, again with AR being more myopic. Both these differences were statistically significant (p<0.001). The astigmatic components, showed less differences, with the mean difference of the J0 being -0.09D (p=0.04), and the J45 of -0.0001D, which was not statistically significant. The correlation coefficient for the refractive parameters was 0.101, 0.063, 0.016,and 0.03 respectively, all of which point to a low correlation between the AR and the MR.
Autorefraction shows poor correlation to manifest subjective refraction with these radially asymmetric multifocal IOLs. The autorefraction tends to underestimate the spherical and spherical equivalent power, while the correlation with the astigmatic components was also low. Autorefraction seems not a valid starting point for manifest subjective refraction with these types of lenses.
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