this test allows an ecological and dynamic checking of visual and attentional aspects related to the correct binocular vision, particularly as far as condition of binocular vision and flexibility of simultaneous perception are concerned - it has been conceived by Roberto Pregliasco and is particularly useful to subjects that approach the use of simultaneous vision contact lenses, since especially in the first few weeks the visual system will have to devote a greater attentive commitment to ensure adequate binocular integration; this means a greater expenditure of visual resources and minor asthenopic symptoms, which are bound to gradually disappear leaving a clear and comfortable vision both for far and near - by applying contact lenses with simultaneous vision like the multifocal ones, it is necessary to verify the good quality of the vision at various distances and it is appropriate to examine the quality of binocular integration - this is the premise to guarantee visual satisfaction to patients who approach this kind of lenses - supplied with Red/Green goggle