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Color Blindness

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Ritesh Karsalia

on 8 January 2013

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Transcript of Color Blindness

The Eye, The Lazy Eye, and The Black Eye, Color Vision Deficiency
What is Color Blindness?
Trouble seeing different light wavelengths like red,green, and blue.
Mostly inherited at birth genetically
Everyone has 3 cone cells (red, green, and blue)
Color Blindness results when one cone is missing or dysfunctioning.
Isn't always inherited, can be acquired from color vision problem such as:
Injury to the eye
Glaucoma Rod Monochromacy
Missing or non functional cones.
Results in total colorblindness, which is also accompanied by bad vision and light sensitivity.
Cone Monochromacy
Both cones and rods are existent, however there is only one type of cone.
Results in total colorblindness, but is no associated with any other vision issues. Retina transplantation
Gene manipulation or gene therapy
Fixing damages chromosome
Unstable, dangerous, and not definite for cure
Monkeys have been successfully cured:
Received injections of genes that produce color detecting proteins Potential Cures? Color Blindness Red Green Colorblindness THANKS FOR
LISTENING! Introduction Conclusion Sources Protanomaly
Defective L cones, difficulty with red
Missing L cones, inability to see reds.
Defective M cones, causes confusion with red's and greens. (Most common)
Missing M cones, causes inability to differentiate between red's and green's Prognosis Color blindness generally lasts in both eyes throughout the persons entire life
There are really no chances of recovery, therefore
Rare case: color blindness occurs in just one eye
Has a chance of going away
Color blindness acquired:
Through genes: severity remains constant throughout life
Not Inherited: severity can become more or less severe over life Possible Treatments Inherited color blindness generally cannot be treated or fixed
Some color vision problems that are acquired can possibly be fixed
Ex: If cataract is causing problem, surgery to remove cataract can restore proper vision
Other ways to help color blindness:
Light filtering lenses or special colored contacts
Help see differences in shades/colors
Can distort objects/vision Tritanomaly
Defective S - cones, difficulty in viewing blue and yellow.
Missing S - cones, inability to distiguinish difference between
Some blues and yellows
Some yellows and purples Blue Yellow Color Blindness Color Blindness can be very life changing
How does color blindness effect someones life? Ask Prathm.
Inherited from my grandfather.
Carried through my mother Diagnosis Total Color Blindness Ishihara color test
Used to diagnose red-green color blindness
Consists of a series of pictures with colored spots
A number is embedded in the picture as a number of spots in a slightly different color.
Has a variety of dots in the background to decide which king of color blindness is present.
In another type of test, you arrange colored chips in order according to how similar the colors are.
Farnsworth Lantern Test
Generally tests Red-Green color blindness
Consists of showing a pair of vertically oriented lights consisting of combinations of either red, green or yellow-white
Colored pairs appear and the person is asked to identify them "Color Blindness: Causes, Symptoms, Diagnosis, and Treatment." WebMD. WebMD, n.d. Web. 28 Dec. 2012. <http://www.webmd.com/eye-health/tc/color-blindness-topic-overview>.
"Color Blindness." Color Blindness. N.p., n.d. Web. 28 Dec. 2012. <http://www.colour-blindness.com/solutions/cure/>.
"Color Blindness." Color Blindness. N.p., n.d. Web. 28 Dec. 2012. <http://www.colour-blindness.com/solutions/>.
"Colorblindness." : How Is Colorblindness Diagnosed. N.p., n.d. Web. 28 Dec. 2012. <http://colorblindnessok.blogspot.com/2009/03/how-is-colorblindness-diagnosed.html>.
"Gene Therapy Cures Color-Blind Monkeys." Wired.com. Conde Nast Digital, 16 Sept. 2009. Web. 28 Dec. 2012. <http://www.wired.com/wiredscience/2009/09/colortherapy/>.
"Health." Color Blindness Prognosis. N.p., n.d. Web. 28 Dec. 2012. <http://www.faqs.org/health/Sick-V1/Color-Blindness-Prognosis.html>.
"Health Guide." Color Blindness. N.p., n.d. Web. 28 Dec. 2012. <http://health.nytimes.com/health/guides/disease/color-blindness/overview.html>.
"Inherited Colour Vision Deficiency." Colour Blind Awareness. N.p., n.d. Web. 28 Dec. 2012. <http://www.colourblindawareness.org/colour-blindness/inherited-colour-vision-deficiency/>.
"Monochromacy â Complete Color Blindness." Monochromacy â Complete Color Blindness. N.p., n.d. Web. 28 Dec. 2012. <http://www.colblindor.com/2007/07/20/monochromacy-complete-color-blindness/>.
"What Is the Prognosis for Color Blindness?" Answerbag. N.p., n.d. Web. 28 Dec. 2012. <http://www.answerbag.com/q_view/455296>. General symptoms vary from person to person
Some common symptoms include:
Being unable to differentiate between different shades of the same/similar colors
You may only see a few shades while regular humans can see thousands
Only being able to see black, white, and gray
Not being able to correctly match or identify a color to its name Symptoms Symptoms A Presentation by Ritesh Karsalia, Vivek Jain and Prathm Juneja Inheritance How is it inherited?
Males are more prone to color blindness
Men have one X chromosome, females have 2 X chromosomes
Because men have only one X chromosome, they inherit the disease while a female needs both X chromosomes to get color blindness
You can also inherit color blindness from a disease
Cataract is one of the most common causes for this inherited genetic deficiency
Retinal and optic nerve maladies will also result in the deficiency
Medicines like digitalis also ensue in color blindness Due 1/9/13
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