“The Arch itself obviously doesn't change in size. Depending upon how far away you are when you view it, however, it can appear to be very large or very small. Why exactly do objects appear to be smaller the farther away we are from them?
The answer lies in the concept of perspective and the difference between apparent size and actual size. These phenomena exist because of the optics of our eyes and how they process the rays of light that reflect off of objects so that we can see them.
For example, the actual size of the Arch doesn't change. It can be measured in meters or feet. Its apparent size, however — what we perceive its size to be — depends upon an angle, which can be measured in degrees.
The visual angle that determines apparent size can be thought of as the angle at the top of a triangle. The eye is the top of the triangle, and the bottom of the triangle is formed by the ends of the object you're looking at.
As an object gets closer, the visual angle increases, so the object appears larger. As the object moves farther away, the visual angle decreases, making the object appear smaller.”
https://wonderopolis.org/wonder/why-do-things-appear-smaller-the-farther-you-are-from-them
Isolating the variables is common technique in maths. So maybe to try to understand consciousness, what if you tried to keep the physical world stationary? We could then analyse the apparent motion of the observer. The only geometrical property that seems to change as you move is perspective. Is there anything more than meets the eye to this phenomenon?
“When you have an equation with one variable and you need to know the value of that variable, your task is to isolate the variable x. It’s called “isolating” because at the end of the process the variable is alone on one side of the equation (and we can see what it equals).
The basic technique to isolate a variable is to “do something to both sides” of the equation, such as add, subtract, multiply, or divide both sides of the equation by the same number. By repeating this process, we can get the variable isolated on one side of the equation. The trick is to know which operations to perform in which order.”
- gmatfree website
Could perspective be understood in terms of magnification? Instead of passively changing in size due to light intensity, the visual object would be actively magnified as it got closer to the observer. Therefore it would appear to demagnify and diminish in size as it moved away from the observer. Consequently the scale of the magnification would be irregular and it would depend on the distance to the person. The mass of the object remains the same.
“Magnification is the process of enlarging the apparent size, not physical size, of something.”
- Wikipedia
“Scale: The ratio of the length in a drawing (or model) to the length on the real thing”
- mathsisfun website
It would be hard to envision a world without perspective. Objects have to get smaller the further away you look. Otherwise your field of view would expand exponentially if external objects stayed the same size.
https://media.evolveconsciousness.org/2013/11/solipsism-all-about-me.jpg
“Consciousness is real. Of course it is. We experience it every day. But for Daniel Dennett, consciousness is no more real than the screen on your laptop or your phone.
The geeks who make electronic devices call what we see on our screens the "user illusion". It's a bit patronising, perhaps, but they've got a point.
Pressing icons on our phones makes us feel in control. We feel in charge of the hardware inside. But what we do with our fingers on our phones is a rather pathetic contribution to the sum total of phone activity. And, of course, it tells us absolutely nothing about how they work.
Human consciousness is the same, says Dennett. "It's the brain's 'user illusion' of itself," he says.”
- BBC
If consciousness were like an image on a screen, then what direction would this 2-dimensional screen be facing? Would it be an opaque screen? So the image we see is facing out towards the physical world. It would be in the opposite direction to the light we perceive.
Or if it was like a translucent screen the image would be in the same parallel direction to the incoming light. It would actually be facing inwards towards the brain.
https://m.youtube.com/watch?v=G0azrs_yPvg
“Emission theory or extramission theory (variants: extromission) or extromissionism is the proposal that visual perception is accomplished by eye beams emitted by the eyes. This theory has been replaced by intromission theory (or intromissionism), which states that visual perception comes from something representative of the object (later established to be rays of light reflected from it) entering the eyes. Modern physics has confirmed that light is physically transmitted by photons from a light source, such as the sun, to visible objects, and finishing with the detector, such as a human eye or camera...
While emission theory does not correctly explain vision, it does correctly describe the mechanism underlying echolocation and sonar. Namely, rays are emitted from the sensing organism or device, and information about the environment is inferred from the rays reflected back by objects.”
- Wikipedia
Physical photons convey the spatial qualities of an object. But colour seems to be internal; we can only observe our own sensation of colour. Could the image we see be multifaceted in having both physical and conscious features? If colour was projected outwards, would that have any testable predictions? The coloured image would then be magnified by the lens of the eye in the opposite direction to the rays of the incoming photons.
https://theswaddle.com/seeing-colors-when-eyes-closed-phosphenes/
https://blogs.transparent.com/german/the-german-colour-eigengrau/
https://d3jlfsfsyc6yvi.cloudfront.net/image/mw:1024/q:85/https%3A%2F%2Fhaygot.s3.amazonaws.com%3A443%2Fcheatsheet%2F11508.png