Demonstration artificial eye in case

Dr Perrin's demonstration artificial eye, made by Nachet & Son, Paris, France, 1880-1900. The model eye is mounted on a ball-joint and is on a dismountable stand, and comes with 12 copper cups which each have in them a painting of retinas suffering from different conditions, which can be clipped into the back of the artificial eye. There are also three different lenses to fit into the front of the eye, mimicking the different sizes of pupil. Within the case is a set of handwritten notes identifying the conditions the 'retinas' are suffering from and other information about the apparatus, and a metal screen painted black, which is clipped behind the eye in order to prevent glare hitting other people.