Retina

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  • The Retina

    1039 Words  | 5 Pages

    THE RETINA: RECEPTOR CELLS The receptor cells are the RODS and CONES. Each consists of: * A process consisting of outer and inner segments. * An external fiber connecting the process with the soma. * A soma or body containing the nucleus. * An inner fiber that resembles an axon and synapses with a bipolar cell. Rods are extremely sensitive to light and can react to a single photon. The light is absorbed by the pigment rhodopsin and the energy acquired results in

  • What 's The Retina Because Of Two Reasons

    1350 Words  | 6 Pages

    9 December 2015 Cover Letter I chose to do the retina because of two reasons. First, I have eye problems and I thought it would be interesting to learn a little-bit more about the eye because of my eye problems. Second, I was debating to do this and Multiple Sclerosis, thenI didn 't want to do a disease and just wanted to do this. *Highlighting- topic of article, yellow= topic sentence, quote ' sentence and quote Cell Paper: The Retina Ill= topic "You have Retinitis Pigmentosa"

  • Dry Macular Degeneration Affects The Retina Of The Eye

    310 Words  | 2 Pages

    Macular Degeneration is a disease that affects the retina of the eye. The retina is a layer in the back of the eye that helps us to see. It is also the lining of the eye that helps us respond to light. However, when having macular degeneration there are major changes in a person's central vision. The disease causes central images to appear blurred and then dark spots may begin to appear that get larger and larger. It may also be very hard to see straight lines as Macular Degeneration may cause them

  • The Complex Structure of the Visual Organ of the Human Body

    1475 Words  | 6 Pages

    layer, the choroid, ciliary body, and retina in the vascular layer, and the retina and optic nerve which comprise the sensory or innermost layer. As each of these structures within the eye performs an integral function that contributes to one’s sense of vision, while others have a supplementary specialized role to protect the eye, impairing any one of these components via trauma or damage to the eye leads to a severe reduction in visual faculty. Damage to the retina, specifically, can cause a condition

  • The Current And Future Implications Of Optical Prosthetics

    2311 Words  | 10 Pages

    prosthetic hearts that can replace old and failing hearts, but never been able to make a prosthetic eye that can actually see. There are 10 million people in the U.S. and many more worldwide who are blind or are facing blindness due to diseases of the retina, diseases like macular degeneration, and there 's little that can be done for them. There are some drug treatments, but they 're only effective on a small fraction of the population. And so, for the vast majority of patients, their best hope for regaining

  • Adult Macula Essay

    1987 Words  | 8 Pages

    fovea contains no retinal capillaries (the foveal avascular zone [FAZ]), making the fovea dependent on blood supply from the choriocapillaries.( Curcio CA,1990) The ora serrata delineates the anterior termination of the sensory retina. Cellular organization of the retina:

  • Retinal Implants

    491 Words  | 2 Pages

    layers. The outer layer is composed of the cornea and sclera, while the middle layer is composed of choroid, ciliary body, and iris, and lastly the inner layer is composed of the retina. The retina houses our photoreceptor cells, rods and cones, which allow our eye to adjust to light making it possible to see. Damage to the retina is detrimental to our vision, which can lead to blindness (Barton, H. and Byrne, K. 2007). Light waves from an object enter the eye through the cornea; the light then moves

  • The Effects Of Age Related Macular Degeneration Essay

    2166 Words  | 9 Pages

    Abstract: “Age-related macular degeneration (AMD) specifically affects the macular region of the central retina, where both ganglion cells and cones are present at very high densities.” (Penfold & Provis, 2005). In this paper, the origins and effects of macular degeneration, both Age-related (usually expressed in adults over 50) and Juvenile (occurring in the teens and early 20’s) are analyzed and discussed. I hate my life. As the most complex organ in the human body and the only externally viewed

  • What Is Extended Ophthalmoscopy And What Are The Different Types?

    858 Words  | 4 Pages

    diagnosis labeled v. Color Guidelines: 1. Red – retinal arterioles, hemorrhaging, neovascularization, vascular anomalies, vascular tumors, retinal breaks, holes in retinoschisis, cilioretinal artery, and inner portion of thin areas of retina 2. Blue – detached retina, retinal veins, outlines of retinal breaks, outlines of ora serrata, traction, outline of lattice degeneration,

  • The Function Of The Cone

    974 Words  | 4 Pages

    photoreceptor in the retina of the eye. Its function, primarily, is to see color while the rods, another photoreceptor located in the retina, is to see light. Overall, this paper will focus on the embryonic origin of the cone, the physiological functions of the cone, the pathology of the cone, as well as the growth factors of the cone. The development of the rod and cone begins in the first stages of life, in the embryo, requiring a series of events, which include three periods; the retina is formed in

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