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E. Cantera, M. Cortes, I. Cantera; Corneal Aberrations in Hyperopic LASIK. Invest. Ophthalmol. Vis. Sci. 2007;48(13):1984.
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© ARVO (1962-2015); The Authors (2016-present)
To investigate refractive, morphological and optical changes induced by Lasik surgery for hyperopia by measuring refractive results, keratorefractive indices and corneal aberrations.
90 hyperopic eyes that underwent hyperopic lasik using an Hansatome microkeratome (Baush&Lomb) and the Technolas 217Z (Baush&Lomb) excimer laser have been evaluated. Corneal topography was performed with Eye-Top (CSO). Mean preoperative cycloplegic refraction was 3,44 +- 1,16 D. Mean preoperative pupillary power was 43,48 +- 6,14 D. Refraction, UCVA, BCVA, Mean pupillary power, Asphericity, Surface Asimmetry Index (SAI), Curvature irregularity have been recorded. Total, cylinder, spherical, coma and HO aberrations have been measured using RMS value for a 5 mm pupil size preoperatively and at 1 year.
Postoperatively: SAI was 1,81 D (std = 2,04); the mean average root mean square (RMS) of total aberrations was 1,30 µm (std 0,64); for spherical aberrations was -0,55 µm (std = 0,90); LSA 0,10 µm (std = 0,18); for coma -0,89 µm (std = 1,60); for HO 0,13 µm (std = 0,20). Corneal aberrations increased after hyperopic treatment; spherical aberration was shifted in negative direction.
Lasik hyperopic treatment induced an increase in corneal aberrations. Evaluation of corneal aberrations can be helpful to evaluate the refractive surgery outcome.
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