Comparison of Wavelight Allegretto Eye-Q and Schwind Amaris 750S excimer laser in treatment of high astigmatismReportar como inadecuado




Comparison of Wavelight Allegretto Eye-Q and Schwind Amaris 750S excimer laser in treatment of high astigmatism - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Graefe-s Archive for Clinical and Experimental Ophthalmology

, Volume 252, Issue 10, pp 1679–1686

First Online: 23 August 2014Received: 19 March 2014Revised: 17 May 2014Accepted: 07 August 2014

Abstract

PurposeTo compare functional outcomes of Wavelight Allegretto Eye-Q 400Hz and Schwind Amaris 750S excimer laser for astigmatism between 2 and 7 dioptersD.

MethodsProspective comparative non-randomized case series of 480 eyes assigned in two laser groups and further divided into myopic and mixed astigmatism subgroups. All treatments were centered on corneal vertex. One-year results were compared between the groups. Statistical analysis was performed using z-test.

ResultsBoth Allegretto and Amaris postoperative uncorrected distance visual acuity UDVA improved in comparison to preoperative corrected distance visual acuity CDVA. The difference was significant in the Allegretto group for myopic astigmatism p = 0.017. There was no difference in postoperative UDVA between lasers. Average sphere decreased in all groups for both lasers p < 0.001 without difference in effectiveness of spherical correction between lasers for both groups. In Allegretto, average cylinder decreased from −3.30D to −0.55D in myopic astigmatism p < 0.001 and from −3.84D to −0.85D in mixed astigmatism p < 0.001. In Amaris average cylinder decreased from −3.21D to −0.43D in myopic astigmatism p < 0.001 and from −3.66D to −0.58D in mixed astigmatism p < 0.001. Amaris group had less residual astigmatism myopic astigmatism p = 0.023, mixed astigmatism p < 0.001. Mean spherical aberration shifted from positive to negative in mixed astigmatism for both lasers.

ConclusionBoth lasers are effective in terms of UDVA, CDVA, spherical correction, and preservation of high-order aberrations. However, Amaris was more effective in cylinder correction.

KeywordsAstigmatism LASIK Excimer laser Ablation profile High-order aberrations  Download fulltext PDF



Autor: Maja Bohac - Alma Biscevic - Mateja Koncarevic - Marija Anticic - Nikica Gabric - Sudi Patel

Fuente: https://link.springer.com/



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