New reliable method for post-LASIK IOL power calculation

Session Details

Session Title: Presented Poster Session: Toric Lenses & IOL Power Calculation

Venue: Poster Village: Pod 1

First Author: : S.Al Rabiah KUWAIT

Co Author(s): :    H. Al Rabiah                       

Abstract Details

Purpose:

Post-Lasik IOLs power calculation is a real challenge, usually with a miss estimation Many methods were described to estimate corneal power with reasonable accuracy. we describe here the use of two modalities 1-Effective Central Corneal Power (ECCP), provided by the NIDEK OPD SCAN 3 2-True Corneal Power ( TCP) by ray tracing, provided by the ZIEMER GALILEI Dual Scheimpflug analyser

Setting:

Department of ophthalmology Rabiah Medical Center Kuwait

Methods:

Retrospective study for 80 previously lasiked eyes, 62 patients, who had cataract surgeries afterwards. IOL calculation was done using: 1- 40 eyes who had previous myopic lasik correction, 20 used the ECCP, 20 using TCP 2- 40 eyes who had previous hyperopic lasik correction, 20 used the ECCP, 20 using TCP 3- All cases were evaluated for refraction one month postoperatively All cases were done by the same surgeon, using the same kind of IOL " Rayner C-flex Ashperic"

Results:

In post myopic lasik correction cases TCP gave spherical equivalent of - 0.60 to -1.45 diopter ECCP gave spherical equivalent of +1.10 to +1.75 diopter In post hyperopic cases TCP gave spherical equivalent of + 0.75 to +1.20 diopter ECCP gave spherical equivalent of - 1.05 to -2.10 diopter

Conclusions:

1-For cataract patients who had myopic lasik correction, TCP, by ray tracing, provides the most accurate, slightly mopic post operative results. 2-For cataract patients who had hyperopic lasik correction,TCP, by ray tracing,gives more hyperopic postoperative results, while ECCP, provides the most accurate, slightly mopic post operative results.

Financial Disclosure:

None