Investigating and Validation Numerical Measures of Corneal Topographic Data in LASIK Surgery Outcome Using Wavelet Transform

In this paper we have approached to new method for analyzing the merit of LASIK operation using multiscalar analysis of discrete corneal topographic height data and transform it into a space-scale space using wavelet analysis technique, and to demonstrate the clinical applicability of these computations in the post-LASIK cornea. Forty patients who were candidates for LASIK operation were selected and seen preoperatively and their corneal topographic images were achieved. Then 6 weeks after operation, patients were assessed using corneal topographic analysis (TMS-1), subjective refraction, and the best-corrected visual acuity (VA). After that, two-dimensional biorthogonal wavelets with the order 6.8 at the scales j=4 revealed the following parameters: root-mean square (RMSDEV) and mean absolute (MEANDEV) deviation and maximum absolute height of the peaks or pitches (MAXPEAK) relative to the reference surface specified with the approximation component of scale j=4. It has shown that MEANDEV and MAXPEAK were correlated with the VA at the follow-up