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Vienna 2018 Delegate Registration Programme Exhibition Virtual Exhibition Satellites 2018 Survey


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Refractive prediction accuracy after intraocular lens implantation in eyes following myopic or hyperopic laser in situ keratomileusis: comparison of two calculation methods

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Session Details

Session Title: Toric IOL Calculations & Alignment

Session Date/Time: Sunday 23/09/2018 | 08:00-10:00

Paper Time: 08:36

Venue: Room A5

First Author: : J.Vryghem BELGIUM

Co Author(s): :                        

Abstract Details


To compare the accuracy of two intraocular lens (IOL) power calculation methods after trifocal IOL implantation in eyes with previous myopic or hyperopic laser in situ keratomileusis (LASIK).


Brussels Eye Doctors, Brussels, Belgium


Post-LASIK eyes were implanted with FineVision Micro F trifocal IOLs (PhysIOL SA, Liège, Belgium). Refractive outcomes were determined by subjective refraction 6 weeks and 6 months after cataract surgery. Postoperatively, refractive predication error (PE) was calculated using two different IOL power calculation methods: the historical method based on pre-LASIK biometry data versus the ASCRS post-LASIK IOL calculator. PE were calculated for the entire cohort and separately for myopic and hyperopic LASIK eyes.


27 eyes after myopic LASIK and 30 eyes after hyperopic LASIK were included in the study. Mean PE of the entire cohort was -0.42±1.02 D (historical method) and -0.26±0.86 D (ASCRS-calculator) with no statistically significant difference between methods. In eyes after myopic LASIK, the historical method (mean PE 0.03±0.71)showed a higher predictabilty than the ASCRS calculator (mean PE 0.32±0.53)but differences were not statistically significant. In post-hyperopia LASIK eyes, the ASCRS calculator showed a statistically significant higher predicatabilty than the historical method (p=0.005) with a mean PE of -0.71±1.09D (historical method) and -0.21±1.10D (ASCRS calculator)


Historical methods based on pre-LASIK biometry data may offer higher predictability outcomes in eyes after myopic LASIK. In contrast, the ASCRS calculator provided superior refractive prediction accuracy compared to the historical method in post-hyperopia LASIK eyes.

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