- ome animals, including your pets, may be partially colorblind, and yet certain aspects of their vision are superior to your own. Living creatures’ visual perception of the surrounding world depends on how their eyes process light. Humans are trichromats—meaning that our eyes have three types of the photoreceptors known as cone cells, which are sensitive to the colors red, green, and blue. A different type of photoreceptors, called rods, detect small amounts of light; this allows us to see in the dark. Animals process light differently—some creatures have only two types of photoreceptors, which renders them partially colorblind, some have four, which enables them to see ultraviolet light, and others can detect polarized light, meaning light waves that are oscillating in the same plane.
Did some basic Googling on polarized light in an attempt to understand how exactly that affects of polarization are seen by Cuttlefish, but I don't think I really get it. Since they're able to detect whether or not light is oscillating on the same plane, how exactly would this help them communicate with each other? In the experiments on this page of Physics Classroom, we can see one image or the other based on how light is reflected off the surface of a projector, or we would perceive different colors based on how the filter is rotated. Since Cuttlefish are completely colorblind, I would have to assume that they can project different signals via different transmitting axes. Is this close to the truth or am I way off?
I can't answer your question, but you might be interested to know that humans can actually see polarized light. Okay, more like sense/detect. And this is how the phenomenon looks like.