Albinism - Paper

Topics: Albinism, Melanin, Iris Pages: 2 (657 words) Published: March 6, 2012
Albinism is the state or condition being an albino. Also it is often caused by the absence of tyrosinase, an enzyme essential for the production of cellular pigment. Albinism is a form of hypopigmentary congenital disorder, characterized by a partial hypomelanism or total lack of melanin pigment in the eyes, skin, and hair. Albinism results from inheritance of recessive alleles. Also another term used for albinism is an albino. Albinism is hereditary; it is not an infectious disease and cannot be transmitted through contact blood transfusions or other rectors. Many types of albinism exist, all of which involve lack of pigment in varying degrees. The condition, which is found in all races, may be accompanied by eye problems and may lead to skin cancer later in life. Most humans and animals with albinism appear white or very pale. This condition not only affects humans, it also affects mammals, fish, birds, reptiles, and amphibian. The most common type of the condition is known as ocular albinism, in which only the eyes lack color; skin and hair are normal. There are five forms of ocular albinism; some types cause more problems especially eye problems than others. Symptoms and Causes

Symptoms and conditions associated with albinism are irregular rapid movement of the eyes back and forth or in circular motion, eye misalignment, hypersensitivity to bright light and glare, and undevelopment of the optic nerve. Also symptoms of albinism can involve the skin, hair, and eyes. The skin, because it contains little pigment, appears very light, as does the hair. Organisms with albinism usually have impaired vision due to one or more of the listed conditions. While a person with albinism may suffer from common refractive errors like nearsightedness or farsightedness, the visual problems particularly associated with albinism arise from a poorly-developed retinal pigment epithelium (RPE) due to the lack of melanin. The main problems of albinism are caused by the...
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