Abstract: A handheld device (100) including a housing; at least one light source arranged within the housing, the at least one light source configured to emit light in at least a first direction; an optical element (300) comprising an inside surface (A) facing the at least one light source and an outside surface (B) opposite the inside surface, the optical element configured to transmit light from the light source; and a plurality of laser-induced modifications (302) formed on the inside surface or inside the optical element and configured to alter a transmission of light through the optical element.

Abstract: An oral care system (10) is provided. The system includes a mouthpiece (14) having a working surface (22) A manifold assembly (12) has a flow path (45) for an oral care compound and terminates at an outlet (18) configured to engage with the mouthpiece and to align one or more ports (24) of the outlet with the working surface when engaged. An actuatable element is configured to dispense the oral care compound from the outlet onto the working surface of the mouthpiece by displacing the oral care compound through the manifold assembly when actuated.

Abstract: A handheld device (100) including a housing; at least one light source arranged within the housing, the at least one light source configured to emit light in at least a first direction; an optical element (300) comprising an inside surface (A) facing the at least one light source and an outside surface (B) opposite the inside surface, the optical element configured to transmit light from the light source; and a plurality of laser-induced modifications (302) formed on the inside surface or inside the optical element and configured to alter a transmission of light through the optical element.