Copenhagen 2016 Registration Programme Exhibitor Information Virtual Exhibition Satellite Meetings Glaucoma Day 2016 Hotel Star Alliance

10 - 14 Sept. 2016, Bella Center, Copenhagen, Denmark

This Meeting has been awarded 27 CME credits


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Intraocular lens power calculations after LASIK using ray-tracing and anterior–posterior corneal topography data

Poster Details

First Author: Y. Mori JAPAN

Co Author(s):    K. Minami   K. Miyata   Y. Iida   K. Kamiya   N. Shoji   K. Shimizu     

Abstract Details


To examine the efficacy of ray tracing and anterior and posterior corneal topography data on intraocular lens (IOL) power calculations after laser in situ keratomileusis (LASIK).


Department of Ophthalmology, Kitasato University, Kanagawa, Japan and Miyata Eye Hospital, Miyazaki, Japan.


Fifty-one eyes from 35 patients who had previously received myopic LASIK underwent cataract surgery with IOL implantation. Preoperatively, anterior and posterior corneal topography was measured with a rotating Scheimpflug photographer. Refractive errors 1 month after surgery were calculated based on the use of ray-tracing calculations with anterior-posterior topography and were compared to those obtained with the SRK/T, double-K, Higis-L, and Shammas-PL methods. The influence of the posterior corneal curvature was also evaluated.


The mean refractive error was -0.05±0.54 (SD) D, and 63 and 94% of eyes were within ± 0.5 and 1.0 D errors, respectively. The SRK/T and double-K were significantly larger (P<0.009, the Holm multiple comparison), whereas no difference was found with the Haigis-L and Shammas-PL. No significant association was observed although the other methods showed significant correlations with the posterior curvatures (P<0.05, Pearson’s correlation).


Ray-tracing calculations combined with anterior and posterior corneal topography were effective for IOL power calculations for eyes after LASIK with the least influence of posterior corneal curvature.

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