Authors: I. Havlíková; J. Kvasnička; P. Rozsíval; J. Peregrin; Lorencová Authors‘ workplace: Oční klinika FN, Hradec Králové, přednosta prof. MUDr. P. Rozsíval, CSc. Published in: Čes. a slov. Oftal., , 2003, No. 3, p. 188-195 Category:
Fourier analysis is a powerful method of evaluating the surface of the cornea. In50 patients after photorefractive keratectomy included in our study we measuredspherical equivalent, regular astigmatism, irregular astigmatism and decentrationretrospectively acquired by Fourier series analysis of corneal topography data1, 3, 6 and 12 months after operation. Postoperative decentration increasedsignificantly froma mean preoperative value.The preoperative andpostoperativevalues are not significantly different. The Fourier spherical equivalent and thevalues of keratometric spherical (equivalent) are highly correlated. Correlationamong decentration, irregular astigmatism and best corrected visual acuity isimportant for clinical practice.Due to Fourier analysis we obtain information, which could explain worse resultsof some surgeries.
Key words: Fourier analysis, videokeratotopography, PRK
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