Vision Panel has the main safety purpose of vision panels that allows people on one side of a door to safely assess whether that has a hazard on the other side of the door without its opening. These are mainly used to lower down the risk of a collision between the persons approaching the door from opposite sides. Vision Panel may come with reduced size and omitted on internal doors where privacy, light control, and security are a requirement in sanitary accommodation, changing rooms or cinemas and auditoriums for example.