May 2007
Volume 48, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2007
Corneal Aberrations in Hyperopic LASIK
Author Affiliations & Notes
  • E. Cantera
    Ophthalmology, Villa Stuart Clinic, Rome, Italy
    Ophthalmology, University of Rome "Campus Biomedico", Rome, Italy
  • M. Cortes
    Ophthalmology, Villa Stuart Clinic, Rome, Italy
    Ophthalmology, University of Rome "Campus Biomedico", Rome, Italy
  • I. Cantera
    Ophthalmology, Quisisana Clinic, Rome, Italy
Investigative Ophthalmology & Visual Science May 2007, Vol.48, 1984. doi:
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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)

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Abstract

Purpose:: To investigate refractive, morphological and optical changes induced by Lasik surgery for hyperopia by measuring refractive results, keratorefractive indices and corneal aberrations.

Methods:: 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.

Results:: 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.

Conclusions:: Lasik hyperopic treatment induced an increase in corneal aberrations. Evaluation of corneal aberrations can be helpful to evaluate the refractive surgery outcome.

Keywords: hyperopia • refractive surgery • optical properties 
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