The Eye And The Ear

The human brain is capable of perceiving and interpreting information or stimuli received through the sense organs (i.e., eyes, ears, nose, mouth, and skin) (Weiten, 1998). This ability to perceive and interpret stimulus allows the human being to make meaningful sense of the world and environment around them. However, even as the human being is able to perceive and interpret stimuli information through all sense organs, stimuli is most often or primarily interpreted using the visual (eyes) and auditory (ears) sense organs (Anderson, 2009). However, for the purpose of this paper, the visual information process will be examined.

As vital organ of vision, the eye, allows us to learn more about the world around us more than any other organ or senses. Sight, the physical sensory experience and vision, the metaphysical concept of how our brain interprets images both work harmoniously and play a huge role in our everyday lives. However, almost a billion people are either blind or visually impaired simply due to not having a pair of glasses. Being able to lead people in the direction of good vision is what developed my interests.

When it comes to vision, we see things based on the light reflected from surfaces. The reflected light waves enter the eye through the cornea at the front of the eye, it's resized at the pupil, focused by the lens, and hits the retina at the back. The light is then detected by rods and cones, photoreceptors, which alters the light into electrical signals. The optic nerve transmits those vision signals to the lateral geniculate nucleus, where visual information is transmitted to the visual cortex of the brain then converts into the objects that we see.

The eye is the organ of sight. It is used in almost everything we do, from playing sport to reading. A normal and well functioning eye can focus objects and images, both near and far, perceive depth and adapt to changes in light.

The eyeball holds many parts to allow eyesight. The retina holds the key to allowing the human eye to see color. The pupil appears as the black part of the eye that people see, the pupil however does not have much to do with comprehending color. As Clarence Rainwater said in his book “The pupil is simply the hole in the iris through which light enters the eye.” (84) The light then has to pass through many parts of the eye before reaching the retina such as the transparent cornea, the aqueous humor, the lens, and the vitreous humor. Clarence Rainwater described the retina as “... the eye’s sensitive inner surface.” (86) The exciting part of the eye starts here. The retina holds the key as stated by Clarence Rainwater, “... a complex system

The Ear, the Eye and the Arm is a science fiction book by Nancy Farmer. It is about three children that are the children of General Matsika, he is the chief of security. He has made many enemies that could take revenge on his children. The children's names are Tendai, Rita, and Kuda. They children have never left the house and gone into the city alone. They are part of an troop and Tendai the oldest of the children needs to get a badge that involves exploring and they can’t get the badge at home. They go out exploring and find themselves in deep trouble. The parents hiring the detectives Ear, Eye and Arm. They do an ok job but really I just wanted to yell at them because when Eye heard the the children Arm yelled at him to go do something else.

Hearing is different from the sense of smell, taste, and sight because it relies on physical movement such as vibrations in the air that are picked up by the ear which causes the eardrum to vibrate. When the vibrations carry through the middle ear, they encounter three bones that are named the hammer, anvil, and the stirrup. These three bones work together to amplify sound waves. The vibrations move from the middle ear into the cochlea that is known as the inner ear. The vibrations in the inner ear cause the fluids called perilymph and endolymph to move around and that is when the brain takes notice. The movement of the fluid bends hair cells that sends signals to the auditory nerve and interprets them. Groups of neurons are decoding every sound that is heard and arranging them to create

We are able to see the world around us thanks to our eyes. First light enters the cornea which is the outermost layer of the eye. The cornea bends the light and it travels through the pupil to the lens which again bends and shapes the light as it moves to the retina. The retina contains thousands of light sensing nerves (rods and cones). These cells

You might believe that the ears are the most essential item needed for hearing. For humans, that maybe partially true. The ears are specifically de sighed to receive sound vibrations that are emitted. They have a funnel-like shape that is perfect for collecting all of the sounds but, sometimes, there are too many that's why it is so hard to listen to two people talking to you at

In the center of the iris is the pupil. Iris function is to control the size of the pupil. This pupil dilation allows a certain amount of light to enter the eye. A bright environment stimulates limiting diaphragm to contract the sphincter muscle and reducing the amount of light entering the eye. A dark room stimulates the dilator to relax and dilate in the effort to increase the amount of light entering the eye. The pupil constriction also occurs when the lens changes focus so that the eye can see something on a fence. This is known as the, Äúnear reflection., AU Sometimes the student does not respond properly due to problems in nerve or cranial

Fluid circulating inside the front portion of the eye is produced by a structure called the ciliary body, which is located behind the iris. This fluid moves through the opening of the pupil, passes into the space between the iris and the cornea, and drains out of the eye through a tissue called the angle. With glaucoma, the passing of fluid

The eyelids are made up of four layers, the skin, muscle, connective tissue and conjunctiva. The process of vision occurs when light waves from an object, enter through the iris. Light then passes through the lens of the eye, a double convex structure that is used to focus the light, and then reaches the retina. Inside the retina are rods and cones. Rods are used to sense light and dark, and cones are used for sensing colors. Whether the light entering the eye hits the cones or rods, a signal is sent across the optic nerve to the brain where it is processed and viewed as an image. Some issues people have with eyesight are as follows. Those who are farsighted are unable to see things clearly at a short distance, compared to a long distance. This occurs when the light that enters the eye is focused behind the retina, and not directly onto it. When the cornea is not curved enough, this happens. Nearsightedness is when one can see objects clear at a short distance, but not at a longer distance, and this is often caused by a change in the cornea. A Blind spot is the location the optic disk, where the optic nerve fiber exits, and at this location there are no cones or rods, so there is a blind spot.

The eye is an opaque eyeball filled with liquid. In the front of the eyeball is a transparent opening known as the cornea. The cornea is a thin membrane