Fourier series harmonic analysis of corneal topography following suture removal after penetrating keratoplasty

Cornea
Fumie KagayaT Oshika

Abstract

To evaluate quantitatively the influence of suture removal after penetrating keratoplasty on corneal refraction including irregular astigmatism. Subjects were 42 eyes of 39 patients with clear corneal grafts who underwent suture removal after penetrating keratoplasty. Videokeratography data taken before and after suture removal were decomposed using Fourier harmonic analysis into spherical power, regular astigmatism, and irregular astigmatism (asymmetry and higher order irregularity). On average, spherical power significantly increased after suture removal (p < 0.0001, paired t test), and regular astigmatism did not change significantly (p = 0.247). Suture removal significantly decreased asymmetry (p < 0.0001) and higher order irregularity (p < 0.0001). Suture removal after penetrating keratoplasty induces myopic shift and reduction in irregular astigmatism of the cornea.

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Citations

Nov 22, 2005·The British Journal of Ophthalmology·C Gruenauer-KloevekornG I W Duncker
Dec 5, 2013·Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association·Boris SeverinskyAbraham Solomon
Aug 15, 2015·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Ting HuangHong Zhang
Feb 7, 2006·American Journal of Ophthalmology·Ken Hayashi, Hideyuki Hayashi
Jun 6, 2003·American Journal of Ophthalmology·Dilek DursunWilliam J Feuer

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