Octopus Retina (Image)

The octopus retina is layed out quite differently than the human retina. With the octopus, the photoreceptors (rods and cones) are located at the surface of the retina. The signal is then transmitted directly down the optic nerve. This configuration means that the octopus doesn’t have a blindspot like in the human eye.

This graphic was captured directly from our Comparative Eye Anatomy lecture, where we explore this further.