;) I guess when they're already grasping at straws anything will do... It shows how much we've learned about the eye since then. It appears to be a one-way viewing device.
They took an image from a rabbit and got an image of a window. But the test that Kuhne performed on a man in the 1880s was not much - the man that was killed was blindfolded at the time - so I dont see how any image would be seen.