This device (10) for evaluating a performance of a visual equipment for at least one wearer of that equipment to perform at least one visual task comprises: at least one input (12) adapted to obtain a model (Ms) of a scene where the task is performed, a model (Mt) of the task comprising a sequence of points to be looked at, a model (Mw) of the wearer comprising a movable head and at least one rotationally movable eye; at least one processor (14) configured for determining a head posture (HP) for at least one of the points so that the model (Mw) of the wearer looks respectively at that point, determining at least one task-directed performance parameter (PP) for the wearer performing the task with the head posture (HP) for that point, on the basis of the wearer, scene and task models (Mw, Ms, Mt), providing the task-directed performance parameter (PP) for determining to which extent the equipment is appropriate for the wearer.
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