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Clinical evaluation of astigmatism correction with femtosecond-assisted astigmatic keratotomy, laser in situ keratomileusis and astigmatic keratotomy with a diamond knife in virgin eyes with spherical equivalent of zero

Poster Details

First Author: H.Khakshoor IRAN

Co Author(s):    A. Eslampoor   A. Askari   H. Mohammad Nejhad   A. Vejdani     

Abstract Details


To assess outcomes of femtosecond laser astigmatic keratotomy (femto-AK), astigmatic keratotomy with a diamond knife (AK) and Laser in-situ keratomileusis (LASIK) procedures in the treatment of high astigmatism


Navid didegan eye clinic, Khatam alanbia Eye Hospital, Eye Research Center, Mashhad, Iran


A retrospective review was performed on thirty patients. Eleven patients underwent LASIK surgery with Nidec 5000. AK was performed for 11 cases with a diamond knife (Ellis) on routine manner. For eight patients (11 eyes) the operation was performed using a femtosecond laser (FEMTEC R, Technolas Perfect Vision, GmbH, Heidelberg, Germany) to create paired arcuate cuts (Bascom Palmer nomogram).


The mean patient age was 35 years (range 26 - 45 years). Preoperative spherical equivalent was zero in all patients and average follow up was 6 months. In femto AK patient group, mean preoperative UCVA (logMAR) was 0.95±0.08 that significantly improved in 3 and 6 month (p<0.001) and mean cylinder was -5.5±1.8D preoperatively that changed to -2.5±1.2 D (p=0.001). Significant difference in UCVA achieved by LASIK and AK which was 0.43 and 0.8±0.18 respectively (p=0.03).The amount of spherical correction was -0.5±0.76D, -1.6±0.6, -1.67±0.19 in LASIK, AK and femto-AK group (p=0.001). There was also significant reduction of cylinder in both AK and LASIK groups, -2.29 and -2.14 D respectively. No surgical complications occurred.


Astigmatic keratotomy using femtosecond laser seems valuable in reducing corneal astigmatism while the center of cornea is not manipulated. Higher numbers of patients are necessary to suggest the better technique. FINANCIAL INTEREST: NONE

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