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Wysłany: Pon 10:58, 23 Maj 2011
Temat postu: Albinism An Introduction Overview of the Genetic C
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Albinism in Culture: Visual Images
Albinism in Culture: Nonfiction
Albinism in Culture: Film
Albinism in Culture
Albinism is profoundly etched in the imagination and has been mythologized or vilified in civilization from antique periods (Zeus incarnating as a white bull and depictions of Christ in Revelation) to the mantled killer Silas in Dan Browns 2003 novel
The Da Vinci Code
.
Facts About Albinism,
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, available on the International Albinism Centers website, provides a succinct introduction to the conditions medicinal and genetic appearances.
Recessive genes (present in approximately 1 in 70 people) carried along both parents reason albinism, which occurs nearly once in each 17,000 births. Albinism impedes the enzyme tyrosinase from converting tyrosine, one amino sour, into Dihydroxyphenylalanine (DOPA), a chemical essential for producing melanin.
The condition has long
class="dynamic">What is Albinism?
Albinism namely set of inherited conditions namely prevent processes important for the product of color in creatures such as chlorophyll in plants and the dark dye melanin namely, in folk, gives color apt the skin, hair,
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, and eyes and provides conservation from ultraviolet light.
Albinism is after used to infuse malign in numerous notable novels such as H. G. Wells
Invisible Man
,
Jamaica Inn
by Daphne du Maurier, and James Dickey’s
Deliverance
.
One of the largest advocacy organizations for persons with albinism and their families is the National Organization of Albinism and Hypopigmentation (NOAH), which offers support and message on all aspects of the condition through its regional parts,
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, sessions, and its website.
Until the 1920s, it was prevalent for persons with albinism to be exhibited as curiosities and sideshow freaks.
Living with cheap vision is albinisms basic dare, affecting training (principally reading), socialization (including sports participation and peek approval), and mobility. Most obstacles tin be overcome with technology and adjustable helps, such as recorded texts and large print writings, and bioptic lenses (small glasses-mounted telescopes) that improve visual acuity, enabling many with albinism to get drivers prerogatives.
Visual defects related with albinism classify it as a disabled. Most with the condition are legally blind, with best-corrected acuity below 20/200. Albinism causes irregular nerve pattern evolution among the eye and the head. Lack of pigment in the retina (the chapter of the eye that perceives light and transmits markers to the brain) is trusted to hinder development of the fovea, the part of the retina that provides sharp, remove vision. Visual failings associated with albinism too embody Nystagmus (involuntary eye activities) and photophobia (light sensitivity).
A catalyst for albinisms progressive use as a symbol of evil is Herman Melvilles 1851 novel
Moby Dick
, in which the narrator, Ishmael, details the dread felt while facing unrelenting whiteness, phoning it the crowning attribute of the grim and the colorless all-color of atheism.
An enduring fable is that people with albinism have red eyes. Lacking melanin, the extremely vascular pupil can have a reddish tinge in the right light, and photographic red-eye is common, yet iris color ranges from blunt gray to brown.
Visual Defects
Most persons with albinism have white or light hair, blue or gray eyes, and light skin. Most parents of babies with albinism have natural hair and eye color and no home history of the condition. Albinism affects people of every country, ethnicity, and religion.
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