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

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

Purpose:

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).

Setting:

Brussels Eye Doctors, Brussels, Belgium

Methods:

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.

Results:

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)

Conclusions:

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.

Financial Disclosure:

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