We all have blind spots because there's a hole in the retina in the back of the eye for the optical nerve. The spots are located on the outer top side of our field of view and you can become aware of them with some visual tests online.

Maybe what I see as red is actually what I see as blue to someone else.

This is a very common interesting thought, but what I've started thinking is even more interesting is this related thought:

Why does red look like it does, to you? I'm not concerned with how other people see red here, I'm just thinking about a single person (me or yourself, for instance). Why does red look like that? Why not differently? Something inside your eyes or your brain must be deciding that.

You could say "oh it's because red is this and that wavelength" but what decides that exactly that wavelength looks like that (red)? There must be some physical process that at some point makes the qualia that is red - but how does it do that? The qualia that is red seems to be entirely arbitrary and decidedly not a physical thing. It is just a sensation, an experience, a qualia. But your eyes/brain somehow decides that ~650 nm wavelength translates to exactly that qualia. What decides that and how?

Apart from the philosophical aspect which is unanswerable, I feel certain we see equivalent colors. This is an interesting article about it. https://en.wikipedia.org/wiki/CIE_1931_color_space Scientists found what the three primary colors our eyes see are. Because of the overlap in cone activation they're actually imaginary colors that don't exist.

I can't describe the difference of red vs blue and I've never met anyone else who could either.

In the Mask movie there is a great scene where he demonstrates colors to his blind girlfriend. They did a really great job with it.

I'm red-green colourblind(Deuteranopia) and often think this exact thing, how the reality I perceive is different from others purely due to this.

I, too, think about this all the time.

If all else fails, a kick in the nuts is a reality check

My bowels have been questioning a lot lately, so it’s not entirely without precedent.

Yea, what about your liver? Have you asked how it feels today?

This isn't really what OP is talking about.

We really can't see very well at all outside of the centre of our focus. this paper says 6 degrees, I heard this as a coin held at arms length.

Our minds "render" most of the rest of what we think we see.

You're right that we discard most of our sensory inputs, but with visual inputs there's much less data than it appears.

When it encounters something that it didn’t predict, it’ll tell you that “yeah this happened and this is why you did that”. Quite often the explanation for doing something is made up after it happened.

There are interesting stories about tests done with split-brain patients, where the bridge connecting the left and right brain hemispheres, the corpus callosum, is severed. There are then ways to provide information to one hemisphere, have that hemisphere initiate an action, and then ask the other hemisphere why it did that. It will immediately make up a lie, even though we know that’s not the actual reason. Other than being consciouss, we’re not that different from ChatGPT. If the brain doesn’t know why something happened, it’ll make up a convincing explanation.

NAILED IT! Yeah, our subconscious is driving and only sends an executive summary up top. And we think, "I did this!" Nah. You didn't. You are just along for the ride.

People hate this notion because it negates free will. Well, yeah, it kinda does.

If you want a fun experiment of all the things we see but don’t actually process, I recommend the game series I’m On Observation Duty. You flip through a series of security cameras and identify when something changed. It’s incredible when you realize the entire floor of a room changed or a giant thing went missing, and you just tuned it out because your brain never felt a need to take in that detail.

It’s sorta horror genre and I hate pretty much every other horror thing, but I love those games because they make me think about how I think.

the 24 fps thing is one hella myth. our cones and rods send a continuous stream of information, which is blended with past-received information in our perception to remove stuff like the movement from darting your eyes around.

We definitely are seeing things faster than 24 Hz, or we wouldn't be able to tell a difference in refresh rates above that.

Edit: I don't think we have a digital, on-off refresh rate of our vision, so fps doesn't exactly apply. Our brain does turn the ongoing stream of sensory data from our eyes into our vision "video", but compared to digital screen refresh rates, we can definitely tell a difference between 24 and say 60 fps.

24fps vision is a lie told by Hollywood so they can save on film

Also, your eyes dart around and you only see a little patch. You blink. Your brain makes up a nice stable image of the world, mostly consisting of things that your brain think should be there.

Some animals, such as certain deep water crustaceans (Matis Shrimp) and cephalopods (Cuttlefish) can see more colors than most mammals, and their brains are often smaller.