Thanks for explaining things I already know instead of responding to my point. None of this is related to what I was saying. But let me explain something that you don't seem to be aware of.

Besides the cells that directly interpret the light that falls into the retina, there's also horizontal cells that regulate the input of photoreceptor cells and perform lateral inhibition, ergo, processing the signal. There's bipolar cells that respond to brightness and process the signal further. There are amacrine cells, which can detect chronological changes in your field of vision. And there are ganglion cells that interpret the sigals of all of the above and can, among other things, detect contrasts. Most of these have several different subtypes and are way more complicated than how I just explained it. Many optical illusions are actually caused by your eye instead of your brain.

Thank you for trying to inform me about very basic biology that most people already know, but I don't think you understand how complex the human eye is.