Author Topic: Color blindness  (Read 1190 times)

Offline Ms. Aziz

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Color blindness
« on: December 05, 2011, 05:10:51 PM »
Color blindness or color vision deficiency is the inability or decreased ability to see color, or perceive color differences, under lighting conditions when color vision is not normally impaired. "Color blind" is a term of art; there is no actual blindness but there is a fault in the development of either or both sets of retinal cones that perceive color in light and transmit that information to the optic nerve.
The symptoms of color blindness also can be produced by physical or chemical damage to the eye, optic nerve, or the brain generally. These are not true color blindness; however, but they represent conditions of limited actual blindness. Similarly, a person with achromatopsia, although unable to see colors, is not "color blind" per se but they suffer from a completely different disorder, of which an atypical color deficiency is only one manifestation.

     


     


       

Here is a Test which is called Ishihara Color Blind Test


Normal Color Vision will see                                                     Red-Green Color Blind will see

Left                          Right                                                  Left                       Right
 25                            29                                                     25                    Only Spots
45                            56                                                   Only Spots             56
6                               8                                                     Only Spots         Only Spots

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Offline M Z Karim

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Re: Color blindness
« Reply #1 on: December 05, 2011, 09:03:39 PM »
Good post.
M Z Karim
Assistant Professor
Department of CSE
Daffodil International University,Dhaka

Offline hasibur rahaman

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Re: Color blindness
« Reply #2 on: December 06, 2011, 02:33:55 AM »
It's a good post. By checking the number on the dots I've found normal eyes.!  ::)
Md. Hasibur Rahaman
Assistant Administrative Officer
Office of the Dean (FSIT) & Emeritus Professor
Daffodil International University

Offline 710000757

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Re: Color blindness
« Reply #3 on: December 06, 2011, 10:52:37 PM »
Interesting post....Thanks
Taslim Ur Rashid
Lecturer
Department of Nutrition and Food Engineering
Daffodil International University

Offline Tanvir Ahmed Chowdhury

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Re: Color blindness
« Reply #4 on: January 18, 2012, 01:00:49 PM »
Informative and Interesting Post.................
Tanvir Ahmed Chowdhury

Assistant Professor
Department of Textile Engineering
Faculty of Engineering
Daffodil International University

Offline sushmita

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Re: Color blindness
« Reply #5 on: January 18, 2012, 03:57:52 PM »
Really interesting and useful.