Gourt > Health > Conditions and Diseases > Eye Disorders > Color Blindness (2)
Color blindness, or color vision deficiency, in humans is the inability to perceive differences between some or all colors that other people can distinguish. It is most often of genetic nature, but may also occur because of eye, nerve, or brain damage, or due to exposure to certain chemicals. The English chemist John Dalton in 1794 published the first scientific paper on the subject, "Extraordinary facts relating to the vision of colours", Dalton J, 1798 "Extraordinary facts relating to the vision of colours: with observations" Memoirs of the Literary and Philosophical Society of Manchester 5 28-45 after the realization of his own color blindness; because of Dalton's work, the condition is sometimes called Daltonism, although this term is now used for a type of color blindness called deuteranopia.
Color blindness is usually classed as a disability; however, in select situations color blind people have advantages over people with normal color vision. Color blind hunters are better at picking out prey against a confusing background, and the military have found that color blind soldiers can sometimes see through camouflage that fools everyone else. Monochromats may have a minor advantage in dark vision, but only in the first five minutes of dark adaptation.
More on [ Color blindness ]
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CNN.com - Health
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Products - Searchable Online Accommodation Resource provides contact details for United States makers and suppliers of assistive devices.
Appearance: Colorblindness - How things look to someone who is colorblind. Overview of tests and genetics.
Meta Description: [ Colorblindness 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. How do things look? ]
Aspects of Perception - Illustrates how people with less than three types of cones can confuse different wavelengths.
Children's Vision: Color Vision Deficiency - Describes signs, testing, causes, types, and disadvantages. From the Optometric Physicians of Washington (OPW).
CNN: New eyeglasses designed to help people with colorblindness - Presents the views of an optometrist and ophthalmologist.
Meta Description: [ When optometrist Frank Siciliano, O.D., first saw an advertisement for ColorMax eyeglass lenses, he took more than a professional interest. Siciliano, who runs the Belmont Eye Clinic in Youngstown, Ohio, is colorblind himself and knows the frustration of not being able to see the world in full, b... ]
Color Blindness - Professional information on color blindness, related conditions and tests.
Color Blindness - Information from Cataract and Laser Institute. Presents signs, symptoms, detection, and treatment options.
Meta Description: [ Color blindness may be a hereditary condition or caused by disease of the optic nerve or retina. ]
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Color Blindness - Identifies many conditions which can cause color problems. Includes information on diagnosis, treatment, and prognosis.
Color Blindness - Presents symptoms, causes, types, and tests. Includes a form for questioning an optometrist.
Meta Description: [ Information on Color Blindness including Color Blindness symptoms and Color Blindness tests options. ]
Color Vision - Presentation about normal vision. Includes spectra, eye anatomy and color response curves.
Color Vision - Discusses school difficulties from low color vision, as well as inheritance and safety considerations.
Color Vision Changes Signal Blood Glucose Fluctuations - 70% of young type 1 patients without retinopathy have color vision changes.
Meta Description: [ Diabetes Health - Complications: Eye Care (Retinopathy). Type 1 diabetes, type 2 diabetes, diabetes causes, diabetes treatments and medication, celebrities with diabetes. Diabetes news articles, videos, blogs and more. ]
Color Vision Confusion - Explains how web pages can be designed to avoid problems for those with colorblindness. Includes color wheels and references for design tutorials.
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Color Vision Screen - Includes a list of careers which may be unsuitable for those with this disorder.
Meta Description: [ "A high-content public reference for eye diseases, diagnosis, evaluation and treatment" ]
Color Vision Test Detects Diabetic Retinopathy Before Vision is Lost - to ID those who will progress to develop more severe retinal disease
Colorblind - Short facts on condition. Links to self-diagnostic test.
Meta Description: [ Information on colorblindness including a self test to help determine if you may be colorblind ]
Colorblind HomePage - Explains mechanics and physiology, and includes color wheels to simulate what the disabled see.
Colorblindness - Includes an Ishihara plate, information from those disabled and their relatives, and links to media articles. The names of colors appear in the color.
Meta Description: [ This page provides extensive information on colorblindness and a list of links for further research ]
Colors for the Color Blind - Provides background information and a set of charts to help those working with computer colors.
Meta Description: [ Color chart for the color blind - specifically for selecting web safe colors on the computer. ]
Colour Blindness - Wikipedia article includes a simple diagnostic test, rates of incidence, causes, and types of deficiency.
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Disability Action Centre - A fact sheet from the Royal Mail in the United Kingdom provides advice for workers.
Drugs Affecting Color Vision - Lists common medications that are thought to contribute to this condition.
Explaining Color Deficiency - Includes chart, tables, and pictures.
Meta Description: [ Colorblindness explained + On-line tests, including testing children ]
FDA Talk Paper: ColorMax Lenses - A fact sheet from the U.S. Department of Health and Human Services addresses the claims made by the manufacturers and promoters.
Meta Description: [ ColorMax, eyeglass lenses, color blindness ]
Firelily Designs - Pictures to approximate what the patient sees. Article about color problems, causes, and compensation with web design or browser settings.
Gene Research on Cure for Colorblindness - A report from the Medical College of Wisconsin outlines the results of trials to insert normal genes into the retina using a retrovirus.
Meta Description: [ Dr. Jay Neitz and his colleagues have identified the types of gene mutations that underlie colorblindness. By inserting normal genes into the retina, they hope one day to be able to give color vision to people who've lost it -- or never had it.
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Looking for Madam Tetrachromat - Considers the possibility of superior color vision. Also discusses color deficiencies. Plain text, but includes URLs for links.
Mayo Clinic: Poor Color Vision - Includes overview, causes, screening and diagnosis, treatment, and coping skills.
Meta Description: [ Poor color vision — Comprehensive overview covers causes, diagnosis of colorblindness. ]
More Prevalent Among Males - A report from the Howard Hughes Medical Institute explains how the condition is inherited.
Meta Description: [ 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 Medical Institute. ]
Seeing Color - Arizona State University provides definitions and tests.
Meta Description: [ Explanation of how we see colors. Learn what are rod cells. Why cone cells in the eye help humans perceive colors. ]
Severity of Colorblindness Varies - An article by the Professor of Ophthalmology at Medical College of Wisconsin.
Meta Description: [ Colorblindness is the inability to distinguish hues that are seen as different by people with normal color vision. There are several types of colorblindness and the severity of the condition varies from individual to individual.
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Vischeck - Allows the user to see the world as color blind people see it. Checks by images and urls.
Meta Description: [ Vischeck color blindness simulator ]
Visolve - Software utility that transforms colors of the computer display into the discriminable colors for people with color blindness.
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