1. A method for screening for a state of ophthalmic fatigue of an individual, comprising steps: a1) of positioning a target relative to the individual in such a way that the target is visible by at least one of the two eyes of the individual; a2) of appraisal by the individual of the clearness of the target; and a3) of deducing a state of ophthalmic fatigue of the individual depending on whether the target is seen clearly or hazily by the individual, said method for screening comprising, a step a0) of adjusting the size of the target or the position of the target relative to the individual, depending on the age of the individual, said step a0) being performed prior to step a2) and said step a0) being performed prior to or following step a1) and step a2).