Device and method simulator of environments for evaluating the visual function comprising a support housing a luxmeter measuring the ambient lighting comprising a plurality of diopters of neutral optical density (od); and where the relation between the optical density and the transmittance (t) of the diopter is given by do = log (1/t); and where the diopters of neutral optical density (od) are arranged in the support in correspondence with the visual system of an individual and configured to reach different levels of illumination directly in the visual system of the individual without making a real variation of the ambient lighting. (Machine-translation by Google Translate, not legally binding)