Eye structure (this is how animals see color!)
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Just as we need our tongues to taste food, we need our eyes to see things.
Our eyes have a complex structure that allows us to perceive not only the shapes of objects but also a wide range of colors.
Incidentally, it is said that people with normal color vision can distinguish 1.875 million colors under standard conditions and up to 7.5 million colors under optimal conditions.
Our eyes have a complex structure that allows us to perceive not only the shapes of objects but also a wide range of colors.
Incidentally, it is said that people with normal color vision can distinguish 1.875 million colors under standard conditions and up to 7.5 million colors under optimal conditions.
Table of Contents
Structure of the Eye (Parts)
Some of you may have learned about this in middle or high school.
At the entrance where light enters the eye are the cornea, iris, and lens. The iris regulates the amount of light entering the eye (the circular opening in the center of the iris is the pupil).
The lens acts as a lens, adjusting focus by changing its thickness.
The sclera is the white part of the eye and acts as a protective barrier to prevent injury to the eyeball.
The retina is the part where light entering the eye forms an image (the part that displays the image), and it contains various nerve cells, including photoreceptors that detect brightness and color.
At the entrance where light enters the eye are the cornea, iris, and lens. The iris regulates the amount of light entering the eye (the circular opening in the center of the iris is the pupil).
The lens acts as a lens, adjusting focus by changing its thickness.
The sclera is the white part of the eye and acts as a protective barrier to prevent injury to the eyeball.
The retina is the part where light entering the eye forms an image (the part that displays the image), and it contains various nerve cells, including photoreceptors that detect brightness and color.
From the Eye to the Optic Nerve
The macula is an area with a high concentration of blood vessels; when viewed from the cornea, it appears as a dark, circular spot.
Within the macula lies the fovea, an area with an extremely high density of photoreceptors; this is where resolution is highest, allowing for the clearest perception of color and shape.
In the retina, photoreceptors convert light into electronic visual signals and transmit them to the optic nerve.
The part where the optic nerve extends from the eye is where the optic nerve fibers are bundled together; this is called the optic disc. When viewed from the cornea, it appears as a milky-white circle, and no image is formed here (you cannot see anything).
The brain interprets color and shape based on the visual information transmitted through the optic nerve.
Within this pathway, the role of photoreceptors in the retina is particularly crucial; if the function of certain photoreceptors is impaired, it becomes difficult to distinguish colors (color vision deficiency).
Within the macula lies the fovea, an area with an extremely high density of photoreceptors; this is where resolution is highest, allowing for the clearest perception of color and shape.
In the retina, photoreceptors convert light into electronic visual signals and transmit them to the optic nerve.
The part where the optic nerve extends from the eye is where the optic nerve fibers are bundled together; this is called the optic disc. When viewed from the cornea, it appears as a milky-white circle, and no image is formed here (you cannot see anything).
The brain interprets color and shape based on the visual information transmitted through the optic nerve.
Within this pathway, the role of photoreceptors in the retina is particularly crucial; if the function of certain photoreceptors is impaired, it becomes difficult to distinguish colors (color vision deficiency).
