I tried to look around this sub for a similar question and cannot see one, but I’m really curious how it works.
In: Biology
[This](https://thedishonscience.stanford.edu/posts/octopus-vision-is-in-the-skin-of-the-beholder/). Seems to suggest that their skin has light receptors as well as in their eyes. After skimming the article, I think it says that they likely gather most info about the light, colour, pattern, etc from their eyes, but their skin is also used in conjunction to also sense and add to the picture of their surroundings. It also says relatives like clams and muscles also sense light with their skin.
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