We present an open wavefront sensor setup assisted with MATLAB programming to be used to teach the operating principle of Shack-Hartmann aberrometry. A new Graphical User Interface (GUI) has also been developed to determine the wavefront parameters from experimental measurements and the associated aberrations, which is a fundamental issue in Optical Engineering. From a didactical point of view, the proposed method allows students to interpret the results in a visual and heuristic way.Contract grant sponsor: Ministerio de Economia y Competividad; Contract grant number: FIS2011-23175; Contract grant sponsor: Generalitat Valenciana; Contract grant number: PROMETEOII/2014/072; Contract grant sponsor: Universitat de Valencia; Contract grant number: UV-SFPIE_DINV14-222801Ferrando Martín, V.; Remón Martín, L.; Pons Martí, A.; Furlan, WD.; Monsoriu Serra, JA. (2016). Wavefront sensing using a graphical user interface. Computer Applications in Engineering Education. 24(2):255-262. https://doi.org/10.1002/cae.21703S25526224
