The goal of the research is to find out whether it is possible to measure a wavefront qualitatively and quantitatively with Janssen’s recently developed analytical algorithm. The spot displacements given by the wavefront sensor are used to relate the derivatives of the wavefront with respect to x and y with the Zernike coefficients of the wavefront itself. The results are compared with some conventional and commercially used methods: an iterative integration method of the SHS, which have been implemented in a Matlab script. Moreover, some of them are compared with the reconstructed wavefront obtained through interferometry. Janssen's method turns out to be a reliable and fast (regarding computation time) wavefront reconstruction method to qualify which aberrations are present.