Dr. Fisher’s schematic eye. Height: 3.25″. This is the “improved model” of the Fisher eye; the earlier cylindrical model is much more common. The frame is heavy cast iron. It comes with a box of 24 retinal images on 12 cardboard discs ( one on each side of the 12 discs) There is also a key to the discs included . When a disc is placed in the holder at the far end of the device, it can be viewed through the lens of the device using an ophthalmoscope, thus simulating a human eye and affording the student practice in using an opthalmoscope. The set retains its original labeled cardboard box and instruction booklet; the latter discusses each condition diagnosable with the Fisher eye. Very good condition.