Background: To improve accuracy of IOLMaster (Carl Zeiss, Jena, Germany) in corneal\npower measurement after myopic excimer corneal refractive surgery (MECRS) using\nmultivariate polynomial analysis (MPA).\nMethods: One eye of each of 403 patients (mean age ....) was subjected\nto MECRS for a myopic defect, measured as spherical equivalent, ranging from ........(.....) Each patient underwent a complete eye\nexamination and IOLMaster scan before surgery and at 1, 3 and 6 months follow up.\nAxial length (AL), flatter keratometry value (K1), steeper keratometry value (K2), mean\nkeratometry value (KM) and anterior chamber depth measured from the corneal\nendothelium to the anterior surface of the lens (ACD) were used in a MPA to devise a\nmethod to improve accuracy of KM measurements. Results: Using AL, K1, K2 and ACD measured after surgery in polynomial degree 2\nanalysis, mean error of corneal power evaluation after MECRS was ....... Conclusions: MPA was found to be an effective tool in devising a method to improve\nprecision in corneal power evaluation in eyes previously subjected to MECRS, according\nto our results.
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