Sight is one of the most important senses because it allows us to gain knowledge about the wold. Without vision our ability to know what your surroundings are is limited. In this essay I will explain the complex structure of the eye, how it works, the properties of vision, and how heterchromia iridis effects the eye. From this essay the reader will be be able to understand the working of the eye and have a foundation for more advanced knowledge.
The eye has an intricate structure that consists of many parts. The sclera, or whites of the eye works to keep in the inside of the eye dark and also to providing the "casing of the eye." Posterior to the sclera is the cornea which is to protect the eye. In addition it also helps the lens in its function to focus light. Behind the cornea is the Aqueous humor which is a watery gel that fills the empty space between the cornea and iris. The pupil is the opening of the eye that lets light through while the iris, the colored part of the eye, controls how much light is allowed through the pupil. Posterior to the iris, there is the lens, which serves to project the image of the outside world on the retina. The retina acts as the "screen" of the eye and is located on the back near the optic nerve. It "feels" the light, then sends the image to the brain, via optic nerve. The optic nerve is the nerve that sends the image to brain. In front of the retina is the vitreous humor the jelly-like substance that fills the empty space of the eye. This is the inner workings of the eye and it's complicated structure.
The essential part of the eye is the projector that throws the image and the screen that detects the image. For vision to work we must have the lens, cornea pair to act as a projec...
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... it can be cause my trauma to the eye. Anterior uveitis an inflammation of the center if the iris and when your iris becomes inflamed you suffer from iritis and both of these inflammations can cause heterchromia iridis. Six out of 1,000 live with heterchromia every day. Some people only have a mild case of heterchromia iridis, so it is very unnoticeable. Most people who have heterchromia iridis is because the disease is mostly hereditary. Heterchromia iridis does it effect your vision. Heterchromia iridis is a very rare disease, but not harmful.
Hopefully with this essay your knowledge about the eye has been expanded and you have a foundation for later inquiry. Without vision we would not be able to gain knowledge of the world. The structure of the eye, how it works, properties of the eye might be very important should you ever have problems with your eye.
The pupil is where light can enter the eye. The iris is in control of the amount of light that actually goes through. The light reaches the lens, which alters the shape of it so the eye can focus on it. Light reaches the retina, which consists of cones and rods. Colors are saw differently based on their implied meanings, which to various psychological functions. The cones are responsible for color. The color red would have such an effect on people’s perception of others based on their production of affect, behavior and cognition. A sociocultural theorist would explain this effect by indicating that the associations with the color red are normal. When a student sees a plethora of red marks on their paper, they automatically think they failed the assignment. Biological theorist would best explain this theory by saying the color red helps them survive or reproduce. A man may be attracted to a woman more because she is wearing red. This attractiveness could cause him to find his mate and eventually reproduce. A behavioral theorist would explain this effect by saying the color red provokes pleasure and avoids pain. A person can associate red with romance and
Adaptation to unpredictable conditions is a key force in driving human evolution. The ability to overcome predicaments with poise is one of the greatest assets humans possess. In “The Mind’s Eye”, Oliver Sacks recounts various perspectives of individuals coping with blindness. Each individual took a different path to becoming accustomed to their blindness and each of the case studies showed compensatory mechanism unique to the individual. Throughout the article, Sacks credits each person for playing to their assets because he views adaptability as a person’s capacity to alter their mode of thought in order to fit their circumstance. Although Sacks shows many examples of neuronal plasticity as an adaptation to blindness, he eludes to the impact
Ruckmann, Adrea von, Fitzke, Fredrick W., & Bird, Alan C., (1997). Fundus autofluorescence in age related macular disease imaged with a laser scanning opthalmoscope. Investigative Opthamology and Visual Science, 38 (2), 478-485.
E. H. L. Leung and M. Hollins, Understanding Blindness: An Integrative Approach, Lawrence Erlbaum Associates, 1989.
The four main components of the eye that are responsible for producing an image are the cornea, lens, ciliary muscles and retina. Incoming light rays first encounter the cornea. The bulging shape of the cornea causes it to refract light similar to a convex lens. Because of the great difference in optical density between the air and the corneal material and because of the shape of the cornea, most of the refraction to incoming light rays takes place here. Light rays then pass through the pupil, and then onto the lens. A small amount of additional refraction takes place here as the light rays are "fine tuned" so that they focus on the retina.
...mation about colorblindness and color deficiencies. Color wheel images used in this paper were taken from this site.
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 through the angle is either reduced or suddenly stops, and amounts of fluid inside the eye increase. This high fluid pressure hurts the nerve fibers and the eye's optic nerve and causes blind spots. It may lead to blindness in some cases.
Now for our eyes we use them for vision, their like our own personal camera’s,
An inspection of the modern animal phyla will reveal that eyes are just as diverse as they are complex. Some organisms like the rag worm have pigmented cup eyes while other like he box jellyfish have two lens eyes and two pairs of pigment pit eyes. To account for the diversity in eye structure, we must first examine the eye ‘prototype’, the original structure that was acted upon by evolution. The simplest organ that can be considered an eye is composed of a single photoreceptor cell and a single pigment cell, without any lens or other refractive body (Arendt, 2003). Such organs are know as eyespots, and...
“The camera may be thought of as a comparable to the eye. The difference is
Your eyes are recessed within the bony sockets of your skull, which provide protection from many types of blunt and sharp object impacts. Even though your eyes are largely protected by the bony sockets of the skull, they are still susceptible to Injury from the front because the front parts of the bony sockets are open which expose the eyes.
Visual perception and visual sensation are both interactive processes, although there is a significant difference between the two processes. Sensation is defined as the stimulation of sense organs Visual sensation is a physiological process which means that it is the same for everyone. We absorb energy such as electro magnetic energy (light) or sound waves by sensory organs such as eyes. This energy is then transduced into electro chemical energy by the cones and rods (receptor cells) in the retina. There are four main stages of sensation. Sensation involves detection of stimuli incoming from the surrounding world, registering of the stimulus by the receptor cells, transduction or changing of the stimulus energy to an electric nerve impulse, and then finally the transmission of that electrical impulse into the brain. Our brain then perceives what the information is. Hence perception is defined as the selection, organisation and interpretation of that sensory input.
Have you ever wondered why the sky is blue. Often times I find myself looking up on a clear day, pondering over that question? Why isn’t it green, or red or pink for even that matter. Every day, the human eye blinks more than 23,00 times. The human eye is a complicated organ that performs one of the most important tasks for our body. There are many questions about the eye however. What function do they perform? What happens if we don’t take care of them? How exactly do they work together to help us form images? Exactly how far can they human eye see?
The Eye is the organ of sight. Eyes enable people to perform daily tasks and to learn about the world that surrounds them. Sight, or vision, is a rapidly occurring process that involves continuous interaction between the eye, the nervous system, and the brain. When someone looks at an object, what he/she is really seeing is the light that the object reflects, or gives off.