21. Color Blindness Check Not until the day I was responsible for an Open Day project on color blindness in my secondary school did I noticed that I am one of the victim . http://www.geocities.com/Heartland/8833/coloreye.html

Color Blindness W hen I was a kid in kindergarten, my parents never knew why I got low grade in identifying the color of crayons. Not until the day I was responsible for an Open Day project on color blindness in my secondary school did I noticed that I am one of the 'victim'. Though I was not blamed for the low grade then, restriction on choosing my job twenty years later frustrated me somehow. C olor blindness is an inaccurate term for a lack of perceptual sensitivity to certain colors. Absolute color blindness is almost unknow. There are three types of color receptors in our eyes, red, green and blue. We also have black and white receptors. They are more sensitive than the color receptors, that is why we have poor color perception in the dark. C olor blindness comes as a result of a lack of one or more of the types of color receptors. Most color perception defects are for red or green or both. About 10% of males have a color perception defect, but this is rare in females. Red-green color blindness is a result of a lack of red receptors. A nother form of color blindness yellow-blue is the second most common form, but it's extremely rare. It is also possible to have the color receptors missing entirely, which would result in black and white vision.

22. How Do Things Look To Colorblind People? Color blindness is typically a genetic condition, and it is much more common in It is extremely rare to be totally color blind (monochromasy complete http://webexhibits.org/causesofcolor/2.html

Related pages: Appearance Types Genetics Testing Color blindness is typically a genetic condition, and it is much more common in men than in women. Approximately one in 12 men has at least some color perception problems. Less common, acquired deficiencies stem from injury, disease, or the aging process. Also, although not called "color blindness," when people age, their corneas typically turn yellowish, severely hampering their ability to see violet and blue colors. How do things look? Many people think anyone labeled as "colorblind" only sees black and white like watching a black and white movie or television. This is a big misconception and not true. It is extremely rare to be totally color blind (monochromasy - complete absence of any color sensation). There are many different types and degrees of colorblindness - more correctly called color deficiencies. Views: People with normal cones and light sensitive pigment (trichromasy) are able to see all the different colors and subtle mixtures of them by using cones sensitive to one of three wavelength of light - red, green, and blue. A mild color deficiency is present when one or more of the three cones light sensitive pigments are not quite right and their peak sensitivity is shifted (anomalous trichromasy - includes protanomaly and deuteranomaly). Summary There are several different kinds and degrees of color vision deficiencies. Protanomalous or deuteranomalous individuals can usually pass as a normal observer in everyday activities. They may make occasional errors in color names, or may encounter difficulties in discriminating small differences in colors, but usually they do not perform very differently from the normal except on color vision tests.

23. Djs_lab Demos Presents several videos used in cognition studies and the results of the studies. Includes change blindness and inattention blindness examples. http://viscog.beckman.uiuc.edu/djs_lab/demos.html

Demos and Stimuli All videos on this site are available solely so that individuals can view examples from our experiments. Many of the videos on this website are available on a DVD presentation tool distributed by VisCog Productions, Inc. This Surprising Studies of Visual Awareness DVD is the only form in which any of these videos are distributed, and it may be used for teaching, presentations, workshops, etc. To learn more (or to order), visit www.viscog.com To view these videos, you will need a recent web browser with javascript active and a recent version of Apple's QuickTime software (you can download it here ). Some of the videos are are contained in Java Applets. To view those videos, you will need to have a Java player installed on your computer and you will need to have Java active in your browser. Change Blindness Examples A person change video This video was used as a stimulus by Levin and Simons (1997). In this video, one actor changes into another actor across a cut. In general, naive observers notice such changes about 30 percent of the time. For this particular video, the noticing rate is somewhat lower. Note that although the two actors are globally similar in appearance, they are wearing noticeably different clothing. 1.1 MB quicktime movie

24. Prosopagnosia ( Face Blindness ) Prosopagnosia, or faceblindness, is when you are unable to recognize other humans by their faces in spite of having good eye sight. http://www.prosopagnosia.com/

Spam Welcome to my pages about prosopagnosia My name is Cecilia Burman, and I am 'face-blind' in the sense that I can not recognize people by their faces. The medical term for this condition is prosopagnosia . I have written these pages to try to give you who read them a better understanding for what it can be like to live with prosopagnosia This is a brief introduction to the pages on this site: Face-Blindness ( Prosopagnosia ) and stones Open in a new window This is a light introduction in pictures to what it can be like to try to cope with face-blindness. If you do not have prosopagnosia yourself, this page can give you an idea about what it is like. Because of the pictures, it loads slowly, but if you are interested in what face-blindness is like, I recommend that you take a look at it anyway. Prosopagnosia ( Face-Blindness ) Open in a new window In this page I try to explain how prosopagnosia can arise. It explains how the brain interprets an image and explains the kind of malfunction that causes

25. Internetworking (1.3) Article-Banner Blindness The purpose of our first experiment was to verify the occurrence of banner blindness under controlled conditions. We designed a strictly hierarchical web http://www.internettg.org/newsletter/dec98/banner_blindness.html

26. Blindness: Learning In New Dimensions (BLIND Inc.) pictures of BLIND, Incorporated student climbing a rock face, students and staff picking apples BLIND, Incorporated is an adjustment to blindness training http://www.blindinc.org/

We are changing what it means to be blind. Programs Capital Campaign Employment Emphasis Audio Brochure ... Make a Donation BLIND, Incorporated is an adjustment to blindness training center. We teach the skills that blind people need to become independent and employable such as braille, home management, the use of the white cane, and computers with screen reading software, etc. But just as importantly, we instill in our students the confidence to put these skills into practice. We utilize the positive view of blindness of the National Federation of the Blind . We work from the premise that blindness doesn't have to be a tragedy. We know that, if given training and opportunity, blind people can live full and productive lives. BLIND, Incorporated offers training for adults, children, teenagers, and seniors. The Comprehensive Program is geared toward adults who want to gain the skills and confidence they need to either continue in their present line of work, continue their education, or begin a new career. Life 101 allows teenagers to learn the skills they need to keep up with their peers and prepares them to attend college or join the workforce.

27. Imagination Blindness - A Site Dedicated To The Bates Method Of Natural Vision I Bates Method of vision improvement, discovered by William Horatio Bates, MD, in the early 20th century. Articles, books, and other resources. http://www.iblindness.org/

in memory of W.H. Bates, M.D. Site Information Main Page What's New About the Webmaster Search Introduction Who Can Benefit The Origins Main Principles The Problem with Glasses ... Signs of Progress Content Article Library Online Books Community Forum Find a Teacher ... View Guestbook Shopping Bates Method Store Feedback/Help Contact Me Quote of the Day: "I have never let my schooling interfere with my education." Mark Twain Join our Community Forum! This is an informational site dedicated to a method of restoring eyesight naturally, without surgery, drugs or glasses. The Bates Method is a natural method to restore eyesight that was discovered in the early 20th century by ophthalmologist William H. Bates. Through examining and experimenting with thousands of patients, he learned that most vision problems are due to habits of tension associated with the process of seeing. He developed techniques that teach people to see in a relaxed way that promotes perfect vision. Conditions for which glasses are normally prescribed such as myopia (nearsightedness), hyperopia (farsightedness), astigmatism, and even presbyopia (old-age sight) have been eliminated through this method, as well as conditions such as strabismus and amblyopia. "Eye strain" and other discomforts of the eye brought about by misuse have be eliminated. More serious conditions and diseases of the eye such as cataract, glaucoma and others, often involve unnecessary tension that contributes to the problem, there have been many cases in which they have been benefited or eliminated.

28. Color Blindness - Color Vision Color blindness may be a hereditary condition or caused by disease of the optic nerve or retina. http://www.stlukeseye.com/Conditions/ColorBlindness.asp

Conditions Home Macular Degeneration Diabetic Retinopathy Dry Eye Syndrome ... Services Search Selected by the sciLINKS program, a service of National Science Teachers Association. Treatment Color Blindness Overview Color blindness may be a hereditary condition or caused by disease of the optic nerve or retina . Acquired color vision problems only affect the eye with the disease and may become progressively worse over time. Patients with a color vision defect caused by disease usually have trouble discriminating blues and yellows. Inherited color blindness is most common, affects both eyes, and does not worsen over time. This type is found in about 8% of males and 0.4% of females. These color problems are linked to the X chromosome and are almost always passed from a mother to her son. Color blindness may be partial (affecting only some colors), or complete (affecting all colors). Complete color blindness is very rare. Those who are completely color blind often have other serious eye problems as well. Photoreceptors called cones allow us to appreciate color. These are concentrated in the very center of the retina and contain three photosensitive pigments: red, green and blue. Those with defective color vision have a deficiency or absence in one or more of these pigments. Those with normal color vision are referred to as trichromats. People with a deficiency in one of the pigments are called anomalous trichromats (the most common type of color vision problem.) A dichromat has a complete absence in one cone pigment.

29. Color Deficient Vision Color blindness references for Web Designers. Cards and Charts simulating the websafe colors in color blindness. Explanation, instructions. http://www.visibone.com/colorblind/

VisiBone Color Deficient Vision Simulation in the Web Designer's Color Card and Chart Color Card (8.5" x 11") Color Chart (18" x 24") Printed color references with color deficiency simulations Toward the lower left on the Card and the Chart is a simulation of deuteranopia , a common variety of color blindness. This is from the Greek for "second doesn't see" referring to the second cones in the retina of the eye that respond primarily to green light and are presumed to be defective in this condition. This doesn't mean that greens are invisible to people with deuteranopia. Human vision is complicated. The role of the green cones is less to detect green light than to distinguish it from red. Similarly, when the red cones "don't see" (protanopia), the main consequence is that reds, yellows and greens are indistinguishable. This figure simulates the web-safe colors as they appear in a deuteranopic condition. In most other categories of color blindness, protanopia, protoanomaly and deuteranomaly, the view is very similar but there are subtle differences. In one very rare form, called tritanopia, affecting thirty people in a million, colors appear very differently. The

30. Color Blindness Problem Set Audrei is redgreen color blind and so are other members of her family. She wanted to know if we could help her understand how she inherited her color http://www.biology.arizona.edu/human_Bio/problem_sets/color_blindness/color_blin

Color Blindness Problem Set This problem set is based on a question received from a woman named Audrei. Audrei is red-green color blind and so are other members of her family. She wanted to know if we could help her understand how she inherited her color blindness. Audrei's family There are 7 children in Audrei's family, three girls and four boys. Two of the girls, Audrei and Liz, are red-green color blind. Caroline has normal color vision. Only two of the boys have been tested. Paul is color blind and David has normal color perception. Andrew and Jason, who have not been tested, may or may not have normal color perception. Barbara, the mother of the seven children, has normal color vision, but Sidney, the father, has the red-green color perception defect. Audrei also has a half brother Stephan. Audrei and Stephan have the same mother, but a different father. Stephan is also red green color blind. Red-green color blindness Red-green color blindness is an X-linked, recessive trait. In this problem set we will establish the pedigree of Audrei's family and see how the color perception defect is passed on from one generation to the next, but first let's look at a brief introduction to sex-linked inheritance. For more complete information about sex-linked inheritance review the Sex-linked Inheritance Problem Set in the Mendelian Genetics section.

31. What's The Legal Definition Of Blindness? - By Alex Joseph - Slate Magazine We re looking for a new Explainer—click here to apply for the job. http://www.slate.com/id/2186489/

var PStax = 58282;var msn_cobrand = 0;var commercialNode = "news/explainer"; placeAd2(commercialNode,'leaderboard',false,'') Home explainer Campaign 2008 Sports Slate on NPR ... Video placeAd2(commercialNode,'120x90',false,'') PRINT DISCUSS E-MAIL RECOMMEND slate:http://www.slate.com/id/2186489/ Facebook MySpace Mixx Digg Reddit del.icio.us Furl Ma.gnolia Sphere StumbleUpon CLOSE NEWSLETTERS PODCASTS RSS adsonar_placementId=1307708;adsonar_pid=833768;adsonar_ps=-1;adsonar_zw=134;adsonar_zh=620;adsonar_jv='ads.adsonar.com'; placeAd2(commercialNode,'120x240top',false,'') placeAd2(commercialNode,'120x240bottom',false,'') More explainer columns Peacekeepers on Trial How U.N. blue-helmets get disciplined. Nina Shen Rastogi posted May 28, 2008 How To Look for Life on Mars Sorting through the extraterrestrial dust. Chris Wilson posted May 27, 2008 Does Congress E-mail the President? How a new piece of legislation gets delivered to the White House. Jacob Leibenluft posted May 22, 2008 The Yellow Liquid Diet Is it a good idea to drink urine when water is scarce? Chris Wilson posted May 21, 2008

32. RRTC On Blindness And Low Vision The mission of the RRTC is to enhance employment and independent living outcomes for individuals who are blind or visually impaired through research, http://www.blind.msstate.edu/

The Rehabilitation Research and Training Center on Blindness and Low Vision The mission of the RRTC is to enhance employment and independent living outcomes for individuals who are blind or visually impaired through research, training, education, and dissemination. Center Research in the News Announcements Faculty and Staff Research ... MSU College of Education This entire site is and and approved. For information regarding this site's content, e-mail RRTC Rehabilitation Research and Training Center on Blindness and Low Vision Last Modified: Wednesday, December 20, 2006 10:43 AM Mississippi State University is an equal opportunity/affirmative action institution. var sc_project=753460; var sc_partition=6; var sc_security="adb49360";

33. WebAIM Visual Disabilities - Color-blindness Before getting into the details of the types of colorblindness, you should know that the following explanations are simplified versions of the complete http://www.webaim.org/articles/visual/colorblind.php

34. BLINDNESS By Jose Saramago A man is sitting at a traffic light one day waiting for the light to turn green and he suddenly goes blind. This is the first blind man. http://www.webster.edu/~corbetre/personal/reading/saramago-blindness.html

BLINDNESS By Jose Saramago. Translated from the Portuguese by Giovanni Pontiero from the 1995 Ensaio sombre a Cegueira. 309 pages London: The Harvill Press, 1997 ISBN: 0-15-136700-9 Comments of Bob Corbett October 2001 Also appended remarks from George Snedeker December 2001 How are we to imagine a world in which some central part of our meaning system suddenly disappears? I've played with the idea in thinking about having survived an atomic war which destroyed most humans, and all the basic infrastructures of everyday life. The problems one runs into even in such a game of imagination is to be consistent and being able to step far enough away to see what it is that really changes. In my day-dreaming imaginings I never went so far as to even dare to consider the inner changes in my person or the other survivors around me. It was much more than I could do to even anticipate and manage the physical problems of change and how to deal with them. Jose Saramago presents us with exactly such a problematic, yet his masterful analysis deals not only with the physical aspects of change and how his characters deal with them, but he inters into the psychological realm and astounds us with his insights and brilliance. A man is sitting at a traffic light one day waiting for the light to turn green and he suddenly goes blind. This is the "first blind man." Slowly this mysterious form of blindness, the like not known in the literature of modern medicine, spreads to the whole nation. As best we know, there is only one sighted person left in the realm. We follow a cast of fewer than 10 characters in detail. We have no names, only descriptors. After all one character tells us "blind people need no names." There is the first blind man, the first blind man's wife. The blind man had a seeming good semaritan who helps him home and but then steals his car and is thus called the man who had stole the car. There is the doctor whom he consults and the doctor's wife, the girl with dark glasses, the boy with the squint and the man with the black eye patch. There are a few others, but these become our key characters, later on adding the dog of tears.

35. HBO: Films - Hysterical Blindness Official web site for Hysterical blindness, an HBO Original Films production. http://www.hbo.com/films/hystericalblindness/

SERIES MOVIES SPORTS DOCUMENTARIES ... Shop HBO Films HYSTERICAL BLINDNESS Hysterical Blindness Home Synopsis Cast and Credits Hysterical Blindness Uma Thurman, Gena Rowlands and Juliette Lewis star in an intimate, character-driven drama that follows three working-class women - two best friends in their late 20s, and one older woman who's the mother of one of the two friends - as they attempt to build relationships and find meaning in their lives within the cultural boundaries of 1980s Bayonne, New Jersey. Read more about this hilarious and heartfelt movie from HBO Films. HBO Films Newsletter Receive exclusive content, production news, special alerts and more! HBO INFO JOBS AT HBO CONTACT US TAKE CONTROL ... REGISTER/SIGN IN This website is intended for viewing solely in the United States. This website may contain adult content.

36. Color Blindness - Free Color Blindness Test And Information On Symptoms, Causes Information on Color blindness including Color blindness symptoms and Color blindness tests options. http://www.eyecaresource.com/conditions/color-blindness/

Color Blindness What is Color Blindness? Color Blindness, or Color Vision Deficiency, is an eye condition where a person is not able to distinguish certain colors or shades of colors to some degree. Color Blindness does not mean that a person can only see black and white. A person with color blindness is able to see different colors, however they are not able to see some colors due to deficiencies in the eyes. Color blindness is a hereditary condition but can also be caused by eye diseases, damage to the retina and macula, and aging or when the lens is darkened over time from a cataract. Although there is no absolute treatment for hereditary color blindness, there are methods, techniques, and special glasses that may help people with color blindness differentiate different colors but not truly see them. If you have extreme trouble distinguishing the numbers in one of the pictures below or are not able to see them at all, then you may have some degree of color blindness. What causes Color Blindness? The retina contains rods and cones that help us to see objects in different colors and varying degrees of brightness. The cones are photoreceptors that allow us to distinguish between many colors and different shades of these colors as well. The cones contain light sensitive pigments that are particular to range of range of wavelengths. There are three different types of cones with one sensitive to

37. International Agency For Prevention Of Blindness Find information about the IAPB, about its vision, events and a newsletter. http://www.iapb.org/

Introduction There are an estimated 37 million blind people and 1.4 million blind children in the world Resources The IAPB Resource Centre - Publications, articles, presentations and more. IAPB Board Elected during the Seventh General Assembly in Dubai, U.A.E., September 2004. Documents Milestones Events Newsletter ... Membership You can support VISION 2020 by becoming a member of IAPB and joining hands in our efforts. http://8ga.iapb.org Sangrafi

38. Eye Conditions > Color Blindness -- EyeMDLink.com Professional information on color blindness, related conditions and tests. http://www.eyemdlink.com/Condition.asp?ConditionID=116

39. Color Blindness: More Prevalent Among Males Research and articles about the sense of vision. Learn more about how humans see, how the eye works, color blindness, and more. From the Howard Hughes http://www.hhmi.org/senses/b130.html

It's All in the Brain Breaking the Code of Color How Do We See Colors? Red, Green, and Blue Cones Color Blindness: More Prevalent Among Males Judging a Color How We See Things That Move The Quivering Bundles That Let Us Hear Locating a Mouse By Its Sound ... HHMI Home Breaking the Code of Color: Color Blindness: More Prevalent Among Males color blindness , but it affects only .4 percent of women. The fact that color blindness is so much more prevalent among men implies that, like hemophilia, it is carried on the X chromosome, of which men have only one copy. (As in hemophilia, women are protected because they have two X chromosomes; a normal gene on one chromosome can often make up for a defective gene on the other.) Nathans himself is not color-blind. Before using his own DNA, he thoroughly tested his color vision to ensure that it was normal. Nevertheless, one of his initial findings presented a puzzle: Lying head to tail along his X chromosome were not just the two genes for the red and green receptors, but also an extra copy of the green receptor gene. Here was the explanation for the prevalence of color blindness, he realized. Because the DNA sequences of the red and green receptor genes are so similar, and because they lie head to tail, it is easy for mistakes to occur during the development of egg and sperm, as genetic material is replicated and exchanged between chromosomes.

40. Change Blindness Demonstration This online demonstration of Ronald Rensink s Change blindness paradigm is a modification of his earlier software for the MacIntosh computer. http://www.usd.edu/psyc301/ChangeBlindness.htm

Change Blindness Demonstration University of South Dakota Internet Psychology Laboratory This on-line demonstration of Ronald Rensink's Change Blindness paradigm is a modification of his earlier software for the MacIntosh computer. We simply appropriated the images used in his program and ported them to an Internet-based "applet". Instructions Once the program starts, right-click anywhere on the stimulus photograph to call a pop-up menu that can be used to change the stimulus timing parameters or switch to another scenario. To exit the demo, simple click the browser's "Back" button to return to this page. Click here to start the Change Blindness demonstration USD Internet Psychology Labs Professor Schieber's Home Page This is the 96,701st time this page has been viewed.

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