Natural delay in processing light

Afterimages happen after the retina's photosensors (the rods and cones in your eyes) become oversaturated, or burned out, from staring at a particular color. This burning out is comparable to lifting weights in the weight room. After doing enough bench presses you lose your bench press strength and will be able to lift only lighter weights. Your muscles are burnt out, if only temporarily, from lifting big weight. Similarly, after staring at a large area of a single color, the eye's photosensors lose their strength for that color. If, afterwards, the eyes look at a blank piece of paper, the photosensors will be weak towards the previously stared at color but fresh and strong for detecting the other colors. This imbalance causes the mind to perceive the image (the afterimage), but in the color opposite to the original color. To the mind, the weakness towards one color means the presence of the opposite primary color is stronger. Quirky perhaps, but this is the way the brain works. If you are staring at a green image, the afterimage should be red. After staring at a yellow image, the afterimage should be blue. The mind sees afterimages in primary colors, so any non-primary color will be seen as the primary opposite.

Triangularism and Calculating Depth

As its optical nerve connects differently, the octopus has no blind spot. Detecting your blind spot
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Everything we perceive involves visual illusion.

Two eyes give the mind a similar two point view of an apple or house, and the mind uses these two views to help guestimate distance. This is mostly done subconsciously. You simply reach out and grab that pencil or penny or door knob or hanging ceiling fan string or stairway railing, no problem. When you wear an eye patch, you may discover it's more difficult to grab things on the first try.

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This simple trick plays with your binocular vision to make it appear as if you have a hole in your hand. Roll a normal piece of 8x11" paper into a tube and place it next to your hand as shown in the following picture. With one eye look through the tube and with the other at your hand. With a little bit of shifting you should perceive what appears to be a large hole through your hand. Your mind takes the two distinct views to create one odd bizarre view.

The following shows examples of afterimages, and a few also involving the process delay.
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Eye/Brain Physiology and Why Humans Don't See Reality …

Binocular vision produces the perception of depth in a way similar to how triangularism measures length in applied mathematics. When looking at a distant point using only one view it is hard to impossible to measure the distance accurately. In applied mathematics, triangularism can accurately calculate this distance from point a to point b by creating an imaginary triangle. Trianglularism has long been used in the real world to measure distant objects, like islands and boats at sea and when surveying land.

Plato’s Cave – Perception or Reality? | truthtolive4

Infrared viewers, such as night vision goggles, do not allow humans to see infrared light, but translate infrared light into visible light. We will never see infrared light, and can only guess how an infrared viewing animal perceives the light.

During the first quarter of this year, the U.S

If a human perceives a person in a magazine picture and a dog does not, which animal has the better perception? Humans often use as evidence of a dog's dimwittedness that the dog 'doesn't see' the human being on the television screen, when, of course, there isn't really a person on the screen. The dog is faulted for not seeing what isn't there.

The 2017 TfL Fare Changes: Perception and Reality

When you are look at a living room or bowl of apples or painting or mountain range, the image you see is not a direct representation of the objects. The image you see is a translation made by your eyes and mind. As demonstrated, binocularism (changing two views into one), afterimages (images created by the eyes/mind), unnoticed blind spots, inability to see colors in low light and countless other purely physiological occurrences ensure that our mental image is always different than the objects viewed.