This invention relates to testing and determining a threshold value used in psychometric testing in field of ophthalmology, neuro-ophthalmology and visual neuropsychology. The method comprises at least the following steps: a) displaying a symbol with a distinctive visual appearance and with a stimulus level to a display at a stimulus time-point, the symbol selected from a group of possible symbols, b) monitoring if a response is given on a response device with multiple choices, each choice representing a possible visual appearance or location of the symbol, and b1) if a response is not given in a response time-limit from the stimulus time-point, increasing the stimulus level of the symbol by a predetermined step and returning to step a), or b2) if a response is given in the response time-limit from the stimulus time-point, comparing the response to symbol displayed in step a), and c1) if the response does not correspond to the symbol displayed in step a), producing, e.g. displaying, an error feedback and returning to step a), or c2) if the response corresponds to the symbol displayed in step a), determining if stop criteria for the test is satisfied, and d1) if stop criteria for the test is not satisfied, decreasing the stimulus level by a predetermined step and returning to step a), or d2) if stop criteria for the test is satisfied, ending the test.La présente invention concerne le test et la détermination d'une valeur de seuil utilisée dans un test psychométrique en ophtalmologie, neuro-ophtalmologie et neuropsychologie visuelle. Le procédé comprend au moins les étapes suivantes consistant à : a) afficher un symbole ayant un aspect visuel distinctif et ayant un niveau de stimulus sur un dispositif d'affichage à un instant de stimulus, le symbole étant choisi parmi un groupe de symboles possibles, b) surveiller si une réponse est ou non donnée sur un dispositif de réponse ayant de multiples choix, chaque choix représentant un aspect visuel ou un emplacement possibl
