• Home Page
  • The Relationship Between The Pupil And The Iris-Sclero

The Relationship Between The Pupil And The Iris-Sclero

Decent Essays
Show More
The pupil is the black hole inside the disk of the iris, almost circular. The external border of the iris is the separation between the disc of the iris and the white of the eye (sclera). In addition, this border is largely covered by other regions such as: the eyelashes or the eyelids.
The main goal of this step is to locate the pupil-iris border and the iris-sclera border, also to extract the different elements that are considered to be noise.
In the literature, there are several researches to segment the iris such as:

Related Documents

  • Decent Essays

    Comparison Of Cornea And Lens
    • 100 Words
    • 1 Pages

    Comparison Of Cornea And Lens

    The eyes include the receptors for vision, which is generated in the retina. Processing pathways of eyes are like a camera, and what difference is people generate information on their sensitive retina, not camera films. Retina has lots of cells that cover the inside back of the eye. The image leaves on eyes by optic nerve; Cornea is responsible for focusing light to be processed; Fovea is the center of macula to sharpen our vision views for focusing; Iris regulates the amount of light, which along with the pupil; Lens focuses on light rays. Visual pigments have rods and cones,…

    • 100 Words
    • 1 Pages
    Decent Essays
    Read More
  • Great Essays

    Summary Of William Paley's 'Watchmaker Argument'
    • 1528 Words
    • 7 Pages

    Summary Of William Paley's 'Watchmaker Argument'

    , The fact of this change over time can be laid down solely to DNA and gene shuffling. It is empirical fact, backed by undisputable evidence, that everytime offspring of a species is produced, the DNA and genetic information are very slightly changed due to errors made in DNA replication. This process, over time, is what creates changes in species, and in the long run, is the cause of evolution. With this taken into account, the most probable way the eye developed was a growth of light sensitive cells, which grew through a random genetic mutation. Over time, random mutations gradually caused an eye socket shaped structure to form layers in light receptive tissue, which could tell which direction the light was coming from.…

    • 1528 Words
    • 7 Pages
    Great Essays
    Read More
  • Decent Essays

    Angle Closure Glaucoma Case Study
    • 780 Words
    • 4 Pages

    Angle Closure Glaucoma Case Study

    Angle-closure glaucoma is defined as an obstruction of the flow of aqueous humor in the eye due to the iris and trabecular meshwork being too close together which creates a closed angle where 270 degrees or more of the angle is occluded.1 Occlusion of the angle causes the intraocular pressure (IOP) to elevate. Optic nerve damage can occur if IOP is greater than 40 mmHg and permanent vision loss can occur if an individual's IOP is greater than 60 mmHg.2 The incidence of angle-closure glaucoma is variable but it is seen more frequently in individuals of Inuit, Chinese, and Asian-Indian descent. In the United States, only a small number of individuals with glaucoma suffer from angle-closure glaucoma. Most individuals with angle-closure glaucoma…

    • 780 Words
    • 4 Pages
    Decent Essays
    Read More
  • Improved Essays

    The Pupil Analysis
    • 546 Words
    • 3 Pages

    The Pupil Analysis

    Moreen’s relationship with Morgan is not common for a mother and her son. She treats him like a mere object and considers him to be worthless as he “fetch[es] her fan”. Readers can also infer that Mrs. Moreen speaks harshly of him because Pemberton is able to note that a “boy of eleven shouldn’t catch” the things she says. Nevertheless, she still has the caring heart of a parent and the reader can assume that she chose Pemberton because he was the most intelligent and wants the finest tutor for son, who must be dealing with a medical condition. Assuring Pemberton that his wage will be “quite regular”, he is able to understand that the definition of “regular” varies between…

    • 546 Words
    • 3 Pages
    Improved Essays
    Read More
  • Improved Essays

    Visual Acuity
    • 975 Words
    • 4 Pages

    Visual Acuity

    This shows that Visual acuity changes depending on the location in the retina and could be influenced by factors which include: the receptive field size, distribution of photoreceptors and illumination. For an individual to view an object, they fixate and place the image of the object on the most sensitive part of the retina, fovea centralis to produce detailed vision. As shown in Figure 2, the fovea has a high number of cone receptors which produce high visual acuity and allows the individual to identify colour and light. A high visual acuity is due “to the 1:1 connection of a cone cell to bipolar cell to a single ganglion cell producing a small receptive field which produces high visual acuity at fixation [4]”. At the peripheral, there is a high rod density which produces low visual acuity and is due to retinal convergence of rods to a single bipolar cell, producing a larger receptive field which reduces visual acuity.…

    • 975 Words
    • 4 Pages
    Improved Essays
    Read More
  • Improved Essays

    Iris Pigmentation Lab Report
    • 877 Words
    • 4 Pages

    Iris Pigmentation Lab Report

    Introduction Has environment pressure of sunlight contributed to the variation in iris pigmentation? Only 10,000 years ago, someone who lived near the Black sea developed a mutation, which resulted in blue iris pigmentation (Eiberg, 2008). The iris consists of small connective tissue surrounded by muscular structure with a central opening known as the pupil (Sturm, 2008). This pupil allows the eye to control the amount of light, which enters to allow they eye to focus the lens to the retina. This sequence allows for a sense of vision (Sturm, 2008).…

    • 877 Words
    • 4 Pages
    Improved Essays
    Read More
  • Decent Essays

    The Bluest Eye Research Paper
    • 502 Words
    • 3 Pages

    The Bluest Eye Research Paper

    Megan DeRock Plato 2A 4/25/17 Bluest Eye Essay The Bluest Eye tells the stories of rape, incest, and pain through the innocent eyes of a young black girl during the great depression. This perspective, seldom seen in literature, brings light to the hardships of being black in 1930s america. Race plays a crucial role in why the women in this novel struggle to find happiness in a world constantly telling them they are ugly. To them the pigment of their skin and eyes are more than just a trait.…

    • 502 Words
    • 3 Pages
    Decent Essays
    Read More
  • Improved Essays

    The Pupil Pemberton
    • 567 Words
    • 3 Pages

    The Pupil Pemberton

    The opening of “The Pupil ” captures the work of Henry James and how he distinguish three characters into one perspective. The author introduces Pemberton’s attitude towards the characters in the story and how his perspective connects all three characters together. Pemberton is formal and also nervous as he approaches Mrs. Moreen and Morgan and when he approaches them , the readers receive a perspective from Pemberton and how he thinks and interacts with the characters. HIs tone changes throughout the story when he first approaches them and how he sees how the mother and son interact with each other. Pemberton attuide towards the character gives the readers his perspective and how he can easily connect all of the characters based on his point of view.…

    • 567 Words
    • 3 Pages
    Improved Essays
    Read More
  • Great Essays

    The Bluest Eye Critical Lens
    • 1281 Words
    • 6 Pages

    The Bluest Eye Critical Lens

    In the novel “The Bluest Eye” by Toni Morrison, It was said that you are not fullythrough messages everywhere that whiteness is superior. The theme of race and that white skin is greatbeauty without having white skin blue eyes and blonde hair. If your white you are superior to ant other race and your life will be portrayed within your skin tone. These stories wwere told by three young girls. The character names were Claudia, Pecola and Frieda.…

    • 1281 Words
    • 6 Pages
    Great Essays
    Read More
  • Decent Essays

    Glaucoma Research Paper
    • 406 Words
    • 2 Pages

    Glaucoma Research Paper

    Glaucoma is a group of eye diseases which result in damage to the optic nerve and vision loss. The most common type is open-angle glaucoma with less common types including closed-angle glaucoma and normal-tension glaucoma. Open-angle glaucoma develops slowly over time and there is no pain. Side vision may begin to decrease followed by central vision resulting in blindness if not treated. Closed-angle glaucoma can present gradually or suddenly.…

    • 406 Words
    • 2 Pages
    Decent Essays
    Read More
  • Improved Essays

    Textual Analysis Of Blade Runner
    • 924 Words
    • 4 Pages

    Textual Analysis Of Blade Runner

    Eyes are repeatedly spotlighted during the film and while the concept is one of an obvious subject to spot, it is one of the most important and yet effective ones. An example would be the eye scanner called Voight-Kampff which in this case is a test method used by blade runners (a special police force) to identify a replicant as this test consists of observing the eye of a subject most specifically the iris for an empathetic response while being questioned is designed to make humans react. From the beginning of the film when this is first used, we are given the idea that our eyes are what make us human as well as exploring themes as if memories makes us who we are and the themes of social hierarchy and social decay some which are revealed subtle through the use of visuals and…

    • 924 Words
    • 4 Pages
    Improved Essays
    Read More
  • Improved Essays

    Pathologic Ocularization
    • 804 Words
    • 4 Pages

    Pathologic Ocularization

    Summary The majority of diseases that cause substantial and irreversible vision loss resulting from pathologic ocular neovascularization such as age-related macular degeneration, diabetic retinopathy, retinopathy of prematurity and ocular tumours. Poor drug delivery to lesions in patient’s eyes is a major obstacle to the treatment. Nanotechnology provides novel opportunities to overcome the limitations of conventional drug delivery systems to reach the back of the eye through fabrication of nanostructures capable of encapsulating and delivering small molecules. This review article summarizes the current ocular drug delivery systems that are associated with development of nanocarriers for treatment of ocular disease in back of the eye.…

    • 804 Words
    • 4 Pages
    Improved Essays
    Read More
  • Improved Essays

    Explain Why Our Eyes Work Like A Camera
    • 320 Words
    • 2 Pages

    Explain Why Our Eyes Work Like A Camera

    Behind the pupil is a colorless, see threw structure called the crystalline lens. A clear fluid called the aqueous humor fills between the cornea and iris. The cornea focuses most of the light and then it goes through the lens. Behind the cornea is a colored, ring shaped membrane called the iris. The iris has an adjustable opening called the pupil which controls the amount of light to the eye.…

    • 320 Words
    • 2 Pages
    Improved Essays
    Read More
  • Great Essays

    Glaucoma Research Paper
    • 1633 Words
    • 7 Pages

    Glaucoma Research Paper

    Late presentation of Glaucoma to health facilities is mostly influenced by poor knowledge of the disease, its risk factors and associated consequences. Sources of eye health information is limited and obtained mostly from family members or friends based on past experiences as such, the available information may be inaccurate and influenced by traditional beliefs. In addition, appropriate information is poorly targeted to persons at risk of developing the disease hence, the health and economic burden of glaucoma is continuously increasing. The Nigerian National Blindness and Visual impairment Survey has shown that glaucoma is the most prevalent cause of blindness and has emphasized the need for increasing glaucoma awareness and patient education in reducing blindness from this disease (Abdu 2013). In addition, (Prior et al. 2013) suggested that it is appropriate to design targeted interventions to change behavior because increased patient awareness and education programs might encourage earlier detection.…

    • 1633 Words
    • 7 Pages
    Great Essays
    Read More
  • Improved Essays

    Structure Of Eye Essay
    • 565 Words
    • 3 Pages

    Structure Of Eye Essay

    The structure of the eye contains several complex structures that make the eye like so of a camera. Without using complex equipment to view all parts of the eye or dissecting it, one can see three structures of the eye: the sclera, the iris, and the pupil. The white part of the eye is known as the sclera which is the outer most part, that helps the eye maintain its shape and protects the eye from injury. The black dot one can see in the middle of the iris is known as the pupil. The pupil is in charge of letting light into the eye.…

    • 565 Words
    • 3 Pages
    Improved Essays
    Read More

Related Topics

Ready To Get Started?
Discover
Company
Follow
©2024 Cram.com
Privacy Policy |  About Ads |  Site Map |  Advertise  | 
  • Cookie Settings