The present disclosure discloses an insulated glazing (2) system (1) comprising at least two glass panes and a spacer element, the at least two glass panes and the spacer element defining a closed volume, a light ray shielding device (3) defining a plurality of transparent areas configured to allow the passage of incident light rays with a given angle of incidence, whereas light rays having otherangles of radiation are unable to pass through the plurality of transparent areas and a plurality of non-transparent areas configured to block the passage of light rays, the non-transparent areas defining a first surface and a second surface, opposite to the first surface, the light ray shielding device (3) being situated within the closed volume, support means (32) mechanically connected to the spacer and operably associated with the light ray shielding device (3) to support it. The light ray shielding device (3) comprises a layer (333) having retroreflective properties, the layer (333) at least partially covering one or both of the first and second surfaces of at least one of the areas of the plurality of non-transparent areas of the light ray shielding device (3).