ELI5; When you close your eyes at night you see all these colours, and when you press your eyes they become more and more vilbrant the harder you push. What are those and where do they come from?

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ELI5; When you close your eyes at night you see all these colours, and when you press your eyes they become more and more vilbrant the harder you push. What are those and where do they come from?

In: Biology
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Your eyes are sensors that receive light and send that signal to the brain to be interpreted as what you see. Applying pressure as you describe activates the sensors in your eyes and sends signals to your brain, and what you see is your brains interpretation of the signals caused by the applied pressure.

Within your eye you have cells that are light-sensitive that send signals to your brain in order to create a picture. These cells are also sensitive to other stimuli (pressure), but do not know the differences between stimuli.

When you rub your eye, you activate these cells and they send information to your brain thinking that they have received light. Your brain interprets the data as if it were light, and it is because of this that you might see stars, auras, and shapes even though your eyes are closed.

These are called phosphenes.

…. i dont usually see different colours when I close my eyes when I sleep… should I be concerned

I was never sure if this was just me or not. Happy to know.

I can also get a similar effect by closing my eyes harder. If that makes sense.

I don’t think the question of when there is no pressure has been answered.

They think it’s because the cells in our eyes including the retina ( like all cells) emit a very small number of photons. In the light we don’t notice them as the receptors in the retina are being bombarded with so many photons. But in the dark the retina can actually detect these and interprets them as colours and patterns.

I get this thing called visual snow where there’s a constant overlay of static like dots over your vision.

I only really notice it when I think about it but it’s much more distracting at night and when I close my eyes I never really see blackness.

It’s apparently possibly some sort of visual tinnitus.

https://en.m.wikipedia.org/wiki/Visual_snow

It’s all of the left over light still journeying it’s way through the little black tunnel highways of your eyes and up to your brain.

I’m middle aged, and I don’t really see those anymore like I did when I was young. Anyone know why?

I believe you’re talking about closed-eye hallucinations. All the other answers I see here aren’t mentioning this and I believe that’s because most people don’t get them. I’m 41 and I just learned this. I thought everyone had this. I have level 3.

https://en.wikipedia.org/wiki/Closed-eye_hallucination

When I close my eyes and press down, I usually see neon orange. Sometimes it’s bright purple and very rarely it’s a chartreuse green. It’s never a primary color, though.

After reading through these replies, I realize I don’t see “normally” either. The closest thing that I see would be Visual Snow, but that still doesn’t really cover it either. It’s like I see things (it’s particularly more noticeable in dimly lit areas such as a dark room with just a TV on) as cartoonish confetti. It’s like combining Visual Snow with Floaters, but it’s not overwhelming at all – it’s my “normal”. I can manipulate the cartoonish confetti to move around, too, to an extent. I usually ignore it, though.

I definitely don’t have 20/20 vision (I haven’t had my eyes checked in a long time), but I don’t wear glasses. The way I see things used to amuse me (I guess it still does sometimes) because the cartoonish confetti looked fun.

Stop it. The harder you press the worse and higher your risk of permantly damaging your eyes.

We all have very sensitive retinal sensors that are activated by both light and pressure.

Gental slight pressure on your eyes is harmless, but hard or sudden pressure can be harmful. Banging your head also can be handful to your vision.

Imagine the sensors in your eyes are like a giant keyboard and when you open your eyes and let the light in its like a master composer playing the keys by pressing the right one for just about right time and pressure.

When you close your eyes and rub them you see a toddler jumping over the keyboard you can still here all the notes (colors) but the composition does not make sense.

I’m sure someone in this thread already said this but please don’t put pressure on your eyes. The first thing I was asked when getting lasik was “do you rub your eyes?” And I had never given it any thought before and then I started to do research and it’s actually pretty bad to do it. Here’s an [article](https://visioneyeinstitute.com.au/eyematters/dangers-rubbing-eyes/) explaining why.