Navigation Links
Chickens May Provide Clues to Color Vision

Studies of retinal differences in birds could lead to treatments for blindness, researchers say

FRIDAY, Feb. 19 (HealthDay News) -- Chickens and other birds have a better ability to see color than humans, a new study finds.

U.S. scientists mapped five types of light receptors in the chicken's eye and found that the receptors are arranged in interwoven patterns that maximize the bird's ability to see many colors in any part of the retina, the light-sensing structure at the back of the eye.

The findings were published recently in the journal PLoS One.

"Based on this analysis, birds have clearly one-upped us in several ways in terms of color vision. Color receptor organization in the chicken retina greatly exceeds that seen in most other retinas and certainly that in most mammalian retinas," study senior author Dr. Joseph C. Corbo, an assistant professor of pathology and immunology and of genetics at Washington University School of Medicine in St. Louis, said in a news release from the school.

The superior color vision in birds is likely because they didn't have to spend a lot of time in the dark during their evolution. In contrast, most mammals were nocturnal for millions of years. Daytime vision relies on light receptors called cones, while night vision relies on receptors called rods. Birds have more types of cones than mammals.

"The human retina has cones sensitive to red, blue and green wavelengths," Corbo said. "Avian retinas also have a cone that can detect violet wavelengths, including some ultraviolet, and a specialized receptor called a double cone that we believe helps them detect motion."

Learning more about how color receptors are organized could help lead to new treatments for the nearly 200 genetic disorders that cause various forms of blindness in humans.

"Many of the inherited conditions that cause blindness in humans affect cones and rods, and it will be interesting to see if what we learn of the organization of the chicken's retina will help us better understand and repair such problems in the human eye," Corbo said.

More information

The American Optometric Association explains why some people have color vision deficiency.

-- Robert Preidt

SOURCE: Washington University in St. Louis, news release, Feb. 15, 2010

Copyright©2010 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. FDA Approves Camelina for Broiler Chickens
2. Live Chickens on Trucks Could Transmit Dangerous Germs
3. Nurtur Is Selected By Keenan & Associates as Exclusive Provider of Disease Management Programs
4. Launches Features to Customize Allergy Information - Top Allergy Web Site Provides ZIP-specific Allergy Information and Diary to Track Symptoms
5. BCS Global Launches PSVN (Public Switched Video Network), an Initiative to Provide a Framework for Inter-Connecting Business to Business Video Networks
6. The Voice of Compassionate Cancer Treatment Just Got Louder: Website Provides Resources and a Call to Action for the Medical Community
7. Save the Children Provides Songs with Lifesaving Health and Nutrition Advice to Haitian Radio Stations
8. Top Raleigh Dentist Robert Williamson Designated A Preferred Invisalign Provider
9. MarquisNet Co-Location Agreement with MessageBroadcast Helps Message Delivery Provider Expand World-Class Network
10. Southridge LLC Provides Equity Capital Through Private Agreement with PuraMed Bioscience
11. Rhode Island Settlement Reflects Homeowner Liability for Serving Alcohol to Those Under 21, Says Providence Lawyer Mark Gemma
Post Your Comments:
(Date:6/26/2016)... ... June 27, 2016 , ... Quality metrics are proliferating in cancer ... they remain in the eye of the beholder, according to experts who offered insights ... American Journal of Managed Care. For the full issue, click here . , ...
(Date:6/26/2016)... Lake Orion, Clarkston, Michigan (PRWEB) , ... June ... ... direction with respect to fertility once they have been diagnosed with endometriosis. These ... tolerable intercourse but they also require a comprehensive approach that can help for ...
(Date:6/25/2016)... ... 25, 2016 , ... First Choice Emergency Room , the largest network ... the Medical Director of its new Mesquite-Samuell Farm facility. , “We are pleased ... location,” said Dr. James M. Muzzarelli, Executive Medical Director of First Choice Emergency Room. ...
(Date:6/24/2016)... ... June 24, 2016 , ... A recent article ... are unfamiliar with. The article goes on to state that individuals are now more ... these less common operations such as calf and cheek reduction. The Los Angeles area ...
(Date:6/24/2016)... ... ... Global law firm Greenberg Traurig, P.A. announced that 20 Florida attorneys are recognized ... this recognition are considered among the top 2 percent of lawyers practicing within the ... this year’s Legal Elite Hall of Fame: Miami Shareholders Mark D. Bloom, Burt ...
Breaking Medicine News(10 mins):
(Date:6/26/2016)... Jazz Pharmaceuticals plc (Nasdaq: JAZZ ... Antitrust Improvements Act of 1976, as amended ("HSR"), with ... ("Celator"; Nasdaq: CPXX ) expired effective June ... As previously announced on May 31, 2016, Jazz ... under which Jazz Pharmaceuticals has commenced a tender offer ...
(Date:6/24/2016)... OAKLAND, N.J. , June 24, 2016 /PRNewswire/ ... in the design, development and manufacturing of collagen ... and regeneration announced today that Bill Messer ... Sales and Marketing to further leverage the growing ... surgery medical devices. Bill joins the ...
(Date:6/24/2016)... June 24, 2016 Research ... "Structural Electronics 2015-2025: Applications, Technologies, Forecasts" ... In-Mold Electronics, Smart Skin, Structural Health ... Structural electronics involves electronic and/or electrical ... structures, replacing dumb structures such as vehicle bodies ...
Breaking Medicine Technology: