Comparison of the induced anterior corneal spherical and comatic aberrations between the classic profiles of the ESIRIS system and the aspheric profiles of the AMARIS system

• Autores: Jordi Gatell Tortajada, Samuel Arba Mosquera
• Localización: Journal of Emmetropia: Journal of Cataract, Refractive and Corneal Surgery, ISSN-e 2171-4703, Vol. 2, Nº. 1, 2011, págs. 37-44
• Idioma: inglés
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• Resumen

  • PURPOSE: To determine the degree of induction of anterior corneal spherical and comatic aberrations by the aspheric ablation of the AMARIS system compared to results with the classic pattern performed by the ESIRIS.

    SETTINGS: Instituto Oftalmológico Tres Torres. Barcelona, Spain.

    METHODS: At six-month follow-up, 108 eyes of 54 patients treated using AMARIS, 56 treated for myopic-astigmatism, and 52 for hyperopic-astigmatism, and 114 eyes of 57 patients treated using ESIRIS (both SCHWIND eye-tech-solutions), 66 treated for myopic-astigmatism, and 48 for hyperopic-astigmatism, were retrospectively analysed.

    Standard examinations, pre- and postoperative wavefront analyses with a anterior cornealwavefront-analyzer (CSO Eye-Top) were performed. LASIK flaps were created using a mechanical microkeratome Zyoptix XP (Technolas Perfect Vision, Germany) with an applanation plate of 120 microns in all cases. Clinical outcomes were evaluated in terms of predictability, refractive outcome, safety, and wavefront aberration.

    RESULTS: Using AMARIS, spherical aberration increased by 22%, 54%, and 67% for low, moderate and high myopias respectively, whereas coma increased by 39%, 57% and 87%; using ESIRIS, spherical aberration increased by 61%, 136%, and 259%, whereas coma increased by 88%, 63% and 109%. Using AMARIS, spherical aberration decreased by -94%, -180%, and - 269% for low, moderate and high hyperopias respectively, whereas coma did not change; using ESIRIS, spherical aberration decreased by -99%, -194%, and -276%, whereas coma did not change. Comparing the differences in the induction of aberrations, it was observed statistical significance favouring AMARIS for myopia but for hyperopia results were comparable.

    CONCLUSIONS:The pattern «aberration-free» implemented at AMARIS is better effective in preserving aberrations in cases of myopia compared with conventional pattern of ESIRIS.

    In case of hyperopias the differences, favouring AMARIS, are not statistically significant.