We started our study with a group of Mexican Males with an Uncorrected Visual Acuity (UCVA) of 20/20, 20/30, and 20/40. The data was obtained using a Nidek OPD Scan ARK 10000 with the Version 1.11b of the working software. With the resulting Zernike coefficients, we calculated the average of the total Wavefront map, the Point Spread Function (PSF), the Optical Transfer Function, (OTF) and the corresponding Modulation Transfer Function (MTF). The purpose of these calculations was to obtain a pattern to be used as a reference to compare with the performance of human eyes after a laser surgery procedure and virgin eyes. In our case, the surgery was performed with an excimer laser Nidek EC-5000 Ver.1.26 W. When the OPD Scan software was upgraded, we realized that the Zernike coefficients for a given eye were different, for each version. Therefore, the aim of this work is to compare our reference pattern of the Zernike coefficients obtained with two different version of the working software.