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Efficacy of tissue-saving LASIK procedure in high myopic eyes

Poster Details

First Author: B.Sirbiladze GEORGIA

Co Author(s):    M. Dvali   N. Tsintsadze   L. Jorjikashvili              

Abstract Details


To assess the efficacy of Zyoptix tissue-saving customized algorithm for correction of high myopia & myopic astigmatism in patients who have the risk of post op ectasia in case of conventional planoscan laser in situ keratomileusis (LASIK).


Department of Ophthalmology, Tbilisi State Medical University, Eye Clinic �â�€�œAkhali Mzera�â�€� Ltd, Tbilisi, Georgia


Eyes with high myopia/myopic astigmatism had undergone LASIK with a Technolas 217z laser using Zyoptix tissue-saving (TS)algorithm. Refraction, corneal topography, aberometry (performed on WAVEFRONT ABERROMETER Zywave II part of the Zyoptix Diagnostic Workstation (ZDW)), UCVA and BCVA data were assessed pre-op, and one week, one month, 6 months and one year post op. The results were compared to the theoretically expected ones of the same patients�â�€�™ undergone tissue saving treatment and to the data of high myopic patients�â�€�™ group treated using planoscan.


The 54 eyes were treated Zyoptix tissue-saving algorithm, among them 48 with high myopia, myopic astigmatism. Full correction could not be achieved due to residual stroma thickness in 4 eyes. Pre Op: SE = - 6.99�.69 D; range from -12.25 to �.5 D; AST = 2.29�.43 range from 0 to 5.5 D UCVA=0.087�.07 range from 0.01 to 0.4 BCVA=0.68�.24 range from 0.1 to 1.0 Post op: SE= - 0.84�.05 Range from -3.75 to 0.25 UCVA= 0.7�.28 Range from 0.1 to 1.0


Using tissue-saving algorithm enables to reduce considerably ablation depth for high myopia correction. Planoscan had no advantage over tissue saving algorithm, according aberometry data, there were not found statistically significant differences between planoscan and tissue-saving algorithm regarding induction of aberrations. The both of platforms were equally effective at reducing myopia and astigmatism.

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