Light waves are forms of electromagnetic energy, they have no color, they are only energy that propagates in a wave-like manner in millions of directions, due to the rebound from all the objects that are in front of our eyes. Its propagation speed is 300,000 km per second in a vacuum, although this speed decreases depending on the density of the medium in which the propagation is taking place.[3]​[4]​.

Colorless matter refers to molecules and atoms. Depending on its chemical and energetic composition, the object can repel or absorb light at specific wavelengths. They have no color, in other words, our brain will be responsible for interpreting it with colors.

The nervous information obtained from the electromagnetic waves that entered the eye travels in the optic nerve. At the end of the path, the brain manufactures the shape, color and movement of the object that has meaning and meaning for the human being. This visual perceptual process is repeated countless times per second and occupies a large part of the resources and volume of the brain.

Visual sensations are an interpretation and not a presentation of external events. The sensation of color, what is seen in the brain, does not have a light nature or a chemical nature, the color that is perceived is, instead, of a purely mental and subjective nature, an invention of the brain to distinguish wavelengths from others and to be able to differentiate more animals, plants and objects from each other.

Perception interprets what is outside of us, creating a world of subjective visual sensations that do not exist outside of the brain.

Our brain is a powerful computer where information passes through the visual cortex and passes from one area to another, reworking new information and responses.

The brain analyzes the information captured by the eye and separates it according to its characteristics and according to the recognition strategies acquired with experience.

A specific way of defining image according to visual perception is: The mental sensation that is formed in the mind of what the retina reports, of what is remembered, imagined. The brain provides us with the images. It uses the information that comes from the retina to create the sensation of color, shape and movement; and other times, it creates the images from within when the individual remembers, imagines or dreams about it.

Area of ​​the visual field in which you do not perceive anything. Theoretically, this occurs because there is an area that is not processed by the visual cortex and therefore cannot even be repaired. In that area you don't see white, black or fill; practically nothing is seen.

This hypothesis also explains why we perceive less in the area of ​​the visual field that our own nose occupies, since its continuous vision could be uncomfortable or distract us. This adaptation of perception makes us get used to vision deficiencies over time and they go unnoticed.

In simple terms, it is what you see out of the corner of your eye. In the entire visual field (which covers 180° horizontally) only the center is perceived with total clarity. We see more clearly in the middle part of our gaze because in the center of the retina there is an especially large concentration of photoreceptor cells, specifically about six million cones. In fact, everything around us (from right to left and from top to bottom) will be perceived worse or not at all.

Peripheral vision provides information about the environment, helps us locate objects and direct our movements quickly or slowly. If there is loss of peripheral vision, or it is poorly integrated, the vision will be like a tunnel and the person will move unsafely.[5]​.

Afterimages are colors and shapes perceived when there is no external stimulus that is sending that information, that is, they are things that we see and that are not in front of us. These "ghost" images correspond inversely to the colors and shapes we had seen a moment before.

The explanation for this common case of after-images is the following: the eye or retina has been burned or damaged by so much light, the sequel that remains in our vision is the after-image.

Indeed this is like this: the cones and, especially, the rods have received so much light that they have stopped functioning properly and, when we open and close our eyes, we perceive a neutral colored area that corresponds to the retinal cells affected by the light. The cones, which are the photoreceptors responsible for color vision, contain neurons that can “fatigue” when faced with a certain color and a constant stimulus. When this happens they produce their image in negative.

This perception of the neutral zone is due to the fact that the images are not erased immediately, but remain recorded on the retina for a time, thanks to retinal persistence.[6]​.

If there are areas of the retina that do not send information to the brain and others that do, when we look at a homogeneous color plane we will perceive a darker area (the one that the "tired" cells should capture).

When there are two very similar colors (with only a variation in tone), focusing on the middle color makes the cones "Cone (cell)") get tired. Then the color saturation decreases, to the point of matching the background color. In other words, the two colors gray as they move towards their complementary and we perceive them to be the same. Look closely at the center of the image, you will notice how the green squares appear and disappear from the image.

The eye moves at high speed to focus on the object or interesting part of a scene we are seeing on the fovea. This happens because only in the fovea are the images that reach us perceived with total clarity.

Our vision captures a total of 30 frames per second. It is our mind that creates the sensation that we see continuously. When two still images alternate at a frequency greater than the eye's refresh rate, we cannot perceive them separately but rather the mixture of the two. Our perception, that is, our vision, produces images that have been collected by our eyes over time. We perceive in jumps and if there is an object that appears and disappears in a very short period of time, we will not perceive it.

Our brain is not capable of processing a multitude of images in a second, which is why we see in fits and starts. These "jumps" are similar to contemplating still images, one after another at such a speed that it seems to us that their presence and movement is continuous. The frequency with which the images coming from the eye are processed by our perception is called "eye refresh rate" and is between 20 and 30 hertz in humans, in other words: we see between 20 and 30 images per second.

Depending on the light intensity of a scene, the pupil and retina change their size. This happens because the spectrum of light intensities is very wide and our eye is prepared to adapt thanks to two systems: the activity of the rods (receptor cells that are activated with low luminosity or scotopic vision) and the contraction of the iris and pupil when there is excess light (photopic vision).

If we do not have them and we continue walking, we run the risk of "burning out" the retinal cells and going temporarily blind. If the sunstroke is excessive, blindness can be permanent.

Adaptation to the lack or excess of light is generated thanks to the pupil; When there is too much light, the iris expands, making the pupil smaller; if there is too little light, the iris contracts and allows the pupil to enlarge, allowing more light to enter the retina. A scene changes color depending on the amount and tone of color that illuminates it; Then, the retina and the neurons of the brain adapt to that light condition by correcting the excess color found there.

The perception of color begins with light. The light that enters our eyes can be measured at different lengths, so, depending on the wavelength of the light, our brain will capture one color or another. In short, colors are nothing more than sensations that our mind creates.

Light is a type of electromagnetic wave. The colors that belong to light are waves that have a length between 380 nanometers (violet) and 780 nanometers (red). This range is the only one visible to the human eye.

Short waves (which include ultraviolet light, x-rays, gamma rays and cosmic rays) are more powerful and can cause more damage to our health.

The color we see in an object does not belong to it. It is the perceptual interpretation of an electromagnetic wave with a specific proportion. It is more a property of light than of objects. These only reflect, absorb or allow waves coming from a light source to pass through.

Photoreceptor cells or cones specialize in capturing three different wavelengths that belong to the three primary colors (R=Red; G=Green; B=Blue). The other colors do not have their own cones to capture light, so they have to use the combination (in different proportions) of the cones belonging to two or three colors. All these colors are invented by the brain when it receives information from these three types of cones in different proportions.

Our memory and the mistaken idea that the characteristics of objects are immutable, makes us think that objects maintain their original color when we are seeing them in another color. That is, the real color of objects matches what we perceive, not what we think it is.

Much of the evaluation we make when perceiving tone and color focuses on how they relate to the environment. Therefore, an object will be perceived as lighter if its surroundings are dark and vice versa.

Cones are cells specialized in capturing the three main colors of the spectrum (red, green and blue). Only some of them will be activated depending on the color they capture. As for the other colors, there are no cells specialized in them, so the cones of two or more colors will be activated in different proportions to obtain the color mixture.

If no color information arrives, we will see black; However, if information about the three colors arrives in equal proportions, we will perceive white.

Some video cameras are capable of capturing infrared or ultraviolet light, but those typically used are those that capture red, blue, and green. The cameras that best capture colors have three 3CCD receivers (chargeable coupled devices), each of which captures one of these three main colors. The color that we best capture or respond to is green.

Light waves are forms of electromagnetic energy, they have no color, they are only energy that propagates in a wave-like manner in millions of directions, due to the rebound from all the objects that are in front of our eyes. Its propagation speed is 300,000 km per second in a vacuum, although this speed decreases depending on the density of the medium in which the propagation is taking place.[3]​[4]​.

Colorless matter refers to molecules and atoms. Depending on its chemical and energetic composition, the object can repel or absorb light at specific wavelengths. They have no color, in other words, our brain will be responsible for interpreting it with colors.

The nervous information obtained from the electromagnetic waves that entered the eye travels in the optic nerve. At the end of the path, the brain manufactures the shape, color and movement of the object that has meaning and meaning for the human being. This visual perceptual process is repeated countless times per second and occupies a large part of the resources and volume of the brain.

Visual sensations are an interpretation and not a presentation of external events. The sensation of color, what is seen in the brain, does not have a light nature or a chemical nature, the color that is perceived is, instead, of a purely mental and subjective nature, an invention of the brain to distinguish wavelengths from others and to be able to differentiate more animals, plants and objects from each other.

Perception interprets what is outside of us, creating a world of subjective visual sensations that do not exist outside of the brain.

Our brain is a powerful computer where information passes through the visual cortex and passes from one area to another, reworking new information and responses.

The brain analyzes the information captured by the eye and separates it according to its characteristics and according to the recognition strategies acquired with experience.

A specific way of defining image according to visual perception is: The mental sensation that is formed in the mind of what the retina reports, of what is remembered, imagined. The brain provides us with the images. It uses the information that comes from the retina to create the sensation of color, shape and movement; and other times, it creates the images from within when the individual remembers, imagines or dreams about it.

Area of ​​the visual field in which you do not perceive anything. Theoretically, this occurs because there is an area that is not processed by the visual cortex and therefore cannot even be repaired. In that area you don't see white, black or fill; practically nothing is seen.

This hypothesis also explains why we perceive less in the area of ​​the visual field that our own nose occupies, since its continuous vision could be uncomfortable or distract us. This adaptation of perception makes us get used to vision deficiencies over time and they go unnoticed.

In simple terms, it is what you see out of the corner of your eye. In the entire visual field (which covers 180° horizontally) only the center is perceived with total clarity. We see more clearly in the middle part of our gaze because in the center of the retina there is an especially large concentration of photoreceptor cells, specifically about six million cones. In fact, everything around us (from right to left and from top to bottom) will be perceived worse or not at all.

Peripheral vision provides information about the environment, helps us locate objects and direct our movements quickly or slowly. If there is loss of peripheral vision, or it is poorly integrated, the vision will be like a tunnel and the person will move unsafely.[5]​.

Afterimages are colors and shapes perceived when there is no external stimulus that is sending that information, that is, they are things that we see and that are not in front of us. These "ghost" images correspond inversely to the colors and shapes we had seen a moment before.

The explanation for this common case of after-images is the following: the eye or retina has been burned or damaged by so much light, the sequel that remains in our vision is the after-image.

Indeed this is like this: the cones and, especially, the rods have received so much light that they have stopped functioning properly and, when we open and close our eyes, we perceive a neutral colored area that corresponds to the retinal cells affected by the light. The cones, which are the photoreceptors responsible for color vision, contain neurons that can “fatigue” when faced with a certain color and a constant stimulus. When this happens they produce their image in negative.

This perception of the neutral zone is due to the fact that the images are not erased immediately, but remain recorded on the retina for a time, thanks to retinal persistence.[6]​.

If there are areas of the retina that do not send information to the brain and others that do, when we look at a homogeneous color plane we will perceive a darker area (the one that the "tired" cells should capture).

When there are two very similar colors (with only a variation in tone), focusing on the middle color makes the cones "Cone (cell)") get tired. Then the color saturation decreases, to the point of matching the background color. In other words, the two colors gray as they move towards their complementary and we perceive them to be the same. Look closely at the center of the image, you will notice how the green squares appear and disappear from the image.

The eye moves at high speed to focus on the object or interesting part of a scene we are seeing on the fovea. This happens because only in the fovea are the images that reach us perceived with total clarity.

Our vision captures a total of 30 frames per second. It is our mind that creates the sensation that we see continuously. When two still images alternate at a frequency greater than the eye's refresh rate, we cannot perceive them separately but rather the mixture of the two. Our perception, that is, our vision, produces images that have been collected by our eyes over time. We perceive in jumps and if there is an object that appears and disappears in a very short period of time, we will not perceive it.

Our brain is not capable of processing a multitude of images in a second, which is why we see in fits and starts. These "jumps" are similar to contemplating still images, one after another at such a speed that it seems to us that their presence and movement is continuous. The frequency with which the images coming from the eye are processed by our perception is called "eye refresh rate" and is between 20 and 30 hertz in humans, in other words: we see between 20 and 30 images per second.

Depending on the light intensity of a scene, the pupil and retina change their size. This happens because the spectrum of light intensities is very wide and our eye is prepared to adapt thanks to two systems: the activity of the rods (receptor cells that are activated with low luminosity or scotopic vision) and the contraction of the iris and pupil when there is excess light (photopic vision).

If we do not have them and we continue walking, we run the risk of "burning out" the retinal cells and going temporarily blind. If the sunstroke is excessive, blindness can be permanent.

Adaptation to the lack or excess of light is generated thanks to the pupil; When there is too much light, the iris expands, making the pupil smaller; if there is too little light, the iris contracts and allows the pupil to enlarge, allowing more light to enter the retina. A scene changes color depending on the amount and tone of color that illuminates it; Then, the retina and the neurons of the brain adapt to that light condition by correcting the excess color found there.

The perception of color begins with light. The light that enters our eyes can be measured at different lengths, so, depending on the wavelength of the light, our brain will capture one color or another. In short, colors are nothing more than sensations that our mind creates.

Light is a type of electromagnetic wave. The colors that belong to light are waves that have a length between 380 nanometers (violet) and 780 nanometers (red). This range is the only one visible to the human eye.

Short waves (which include ultraviolet light, x-rays, gamma rays and cosmic rays) are more powerful and can cause more damage to our health.

The color we see in an object does not belong to it. It is the perceptual interpretation of an electromagnetic wave with a specific proportion. It is more a property of light than of objects. These only reflect, absorb or allow waves coming from a light source to pass through.

Photoreceptor cells or cones specialize in capturing three different wavelengths that belong to the three primary colors (R=Red; G=Green; B=Blue). The other colors do not have their own cones to capture light, so they have to use the combination (in different proportions) of the cones belonging to two or three colors. All these colors are invented by the brain when it receives information from these three types of cones in different proportions.

Our memory and the mistaken idea that the characteristics of objects are immutable, makes us think that objects maintain their original color when we are seeing them in another color. That is, the real color of objects matches what we perceive, not what we think it is.

Much of the evaluation we make when perceiving tone and color focuses on how they relate to the environment. Therefore, an object will be perceived as lighter if its surroundings are dark and vice versa.

Cones are cells specialized in capturing the three main colors of the spectrum (red, green and blue). Only some of them will be activated depending on the color they capture. As for the other colors, there are no cells specialized in them, so the cones of two or more colors will be activated in different proportions to obtain the color mixture.

If no color information arrives, we will see black; However, if information about the three colors arrives in equal proportions, we will perceive white.

Some video cameras are capable of capturing infrared or ultraviolet light, but those typically used are those that capture red, blue, and green. The cameras that best capture colors have three 3CCD receivers (chargeable coupled devices), each of which captures one of these three main colors. The color that we best capture or respond to is green.