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Intraocular lens power calculation after intracorneal ring segment surgery for the treatment of post-LASIK ectasia

Session Details

Session Title: Biometry

Session Date/Time: Tuesday 08/10/2013 | 08:00-10:30

Paper Time: 10:08

Venue: Elicium 2 (First Floor)

First Author: : E.Jarade LEBANON

Co Author(s): :    A. Dirani   A. Fadlallah   F. Abi Nader   G. Cherfan     

Abstract Details


To describe the method of Intraocular lens (IOL) power calculation in eyes after Intracorneal ring segment (ICRS) surgery for the treatment of post-LASIK ectasia


University Hospital, Beirut Eye Specialist Hospital, Beirut, Lebanon and The Dubai Mall Medical Center, Dubai, United Arab Emirates


Anterior corneal curvature in the central effective optical zone was averaged using corneal topography and k-reading (Kr) was calculated using Jarade IR method for Kr after LASIK. The calculated Kr was used in SRK-T formula for IOl calculation. Accuracy of this IOL calculation method was judged using the manifest refraction outcome after cataract surgery. All eyes were targeted for emmetropia after cataract


Three eyes of 2 consecutive patients were included in this study. One eye developed cataract after ICRS surgery that was performed for the treatment of ectasia after hyperopic LASIK (+4 D) and 2 eyes presented with cataract formation after ectasia that developed following myoic LASIK (-10 D). In this 2 eyes, ICRS were implanted before cataract surgeries. The spherical equivalent of manifest refraction after cataract surgery were within 1.25 D in all eyes


Using the average corneal curvature in the central effective optical zone to calculate Kr by Jarade IR method was found to be accurate in calculating IOL power in ectatic eyes treated by ICRS surgery

Financial Interest:


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