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