Iris (anatomy) - Wikipedia, the free encyclopedia
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The iris is a membrane in the eye, responsible for controlling the diameter and size of the pupil and the amount of light reaching the retina. "Eye color" is the color of the iris, which can be gree...
en.wikipedia.org/wiki/Iris_(anatomy)
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Described is the iris and aspects of this ocular structure. ... When too much light is entering the eye, the iris sphincter muscle (which encircles the pupil) pulls toward the center, causing the pupil to “constrict” and allowing less light to reach the retina.
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www.tedmontgomery.com/the_eye/iris.html
www.tedmontgomery.com/the_eye/iris.html
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Eye color, or more correctly, iris color is due to variable amounts of eumelanin (brown/black melanins) and pheomelanin (red/yellow melanins) produced by melanocytes. More of the former is in brown eyed people and of the latter in blue and green-eyed people.
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webvision.med.utah.edu/anatomy.html
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The iris is the colored part of the eye that surrounds the pupil. ... The iris changes in size as a function of the amount of light. Bright light makes the pupil get smaller (the iris gets larger) and vice versa.
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www.yorku.ca/eye/iris.htm
www.yorku.ca/eye/iris.htm
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Iris Eye-A person whose eyes are not coordinated well enough to produce this alignment is said to have 'strabismus,' or squint. ... Eye Muscle Control...
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www.innerbody.com/image_nerv08/nerv112.html
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Media in category "Iris (eye)" ... Eye iris.jpg; 668,587 bytes; ... Iris - left eye of a...; 698,222 bytes;
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commons.wikimedia.org/wiki/Category:Iris_(eye)
commons.wikimedia.org/wiki/Category:Iris_(eye)
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PURPOSE: To describe the use of intracameral phenylephrine to prevent the floppy iris syndrome seen in patients who are on the drug tamsulosin for benign prostatic hypertrophy, during cataract surgery. SETTING:Prince Charles Eye Unit, King Edward VII Hospital, Windsor, Berkshire, UK.
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www.ncbi.nlm.nih.gov/pubmed/16284599
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Behind the cornea are the iris, the pupil, and the anterior chamber. The iris (say: eye-riss) is the colorful part of the eye. When we say a person has blue eyes, we really mean the person has blue irises! The iris has muscles attached to it that change its shape.
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kidshealth.org/kid/htbw/eyes.html
kidshealth.org/kid/htbw/eyes.html
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Commons:Featured picture candidates/Image:Eye iris.jpg ... Categories: Picture of week on the Czech Wikipedia | Iris (eye) ... Usage of Eye iris.jpg on afwiki...
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commons.wikimedia.org/wiki/File:Eye_iris.jpg
commons.wikimedia.org/wiki/File:Eye_iris.jpg
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