Navigation Links
Owl study expands understanding of human stereovision
Date:7/11/2011

Rockville, Md. Using owls as a model, a new research study reveals the advantage of stereopsis, commonly referred to as stereovision, is its ability to discriminate between objects and background; not in perceiving absolute depth. The findings were published in a recent Journal of Vision article, Owls see in stereo much like humans do.

The purpose of the study, which was conducted at RWTH Aachen (Germany) and Radboud University (Nijmegen, Netherlands), was to uncover how depth perception came into existence during the course of evolution.

"The reason why studying owl vision is helpful is that, like humans, owls have two frontally placed eyes," said author Robert F. van der Willigen, PhD, of Donders Institute for Brain, Cognition and Behavior at Radboud. "As a result, owls, like humans, could appreciate the 3-dimensional shape of tangible objects through simultaneous comparison of the left and right eye."

van der Willigen studied two trained barn owls (Tyto alba) by conducting a series of six behavioral experiments equivalent to those used on humans. He used computer-generated binocular random-dot patterns to measure stereo performance, which showed that the owl's ability to discriminate random-dot stereograms is parallel to that of humans despite the owl's relatively small brain. The results provided unprecedented data on stereovision, with findings that debunk the long-held consensus that the evolutionary advantage of seeing in stereo must be depth vision.

He contends the findings demonstrate that while binocular disparity, the slight difference between the viewpoints of the right and left eyes, does play a role in perceiving depth, it allows owls, like humans, to perceive relative depth rather than absolute distance. "It is useful, therefore, not so much in controlling goal-directed movements as it is in recognition."

In looking at future studies, van der Willigen hopes that scientist will consider that human or primate vision is not the only way to examine the stereovision experience. "My present work on the owl highlights underappreciated, but fundamental aspects of stereopsis," he says. "Nonetheless, final proof should come with behavioral demonstration of equivalent stereoscopic abilities in animals other than the owl. Hopefully, my current work will encourage scientists to investigate other animal species."


'/>"/>

Contact: Katrina Norfleet
knorfleet@arvo.org
240-221-2924
Association for Research in Vision and Ophthalmology
Source:Eurekalert

Related biology news :

1. Long-term study shows effect of climate change on animal diversity
2. £2 million study to reveal workings of dementia genes
3. New study looks to define evangelicals and how they affect polling
4. CU-Boulder study suggests air quality regulations miss key pollutants
5. Researchers study acoustic communication in deep-sea fish
6. Study reveals homeowner perceptions in fire-prone areas
7. Researchers study how pistachios may improve heart health
8. Study: urban black bears live fast, die young
9. New study indicates link between weight gains during pregnancy and dieting history
10. Study reveals specific gene in adolescent men with delinquent peers
11. Sweat it out: UH study examines ability of sweat patches to monitor bone loss
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/5/2017)... KEY FINDINGS The global market for stem ... 25.76% during the forecast period of 2017-2025. The rise ... growth of the stem cell market. Download ... The global stem cell market is segmented on the ... cell market of the product is segmented into adult ...
(Date:3/30/2017)... LOS ANGELES , March 30, 2017  On ... Hack the Genome hackathon at ... This exciting two-day competition will focus on developing health ... experience. Hack the Genome is ... has been tremendous. The world,s largest companies in the ...
(Date:3/29/2017)...  higi, the health IT company that operates the ... , today announced a Series B investment from ... The new investment and acquisition accelerates higi,s strategy to ... population health activities through the collection and workflow integration ... collects and secures data today on behalf of over ...
Breaking Biology News(10 mins):
(Date:6/22/2017)... ... June 22, 2017 , ... RURO, Inc., a ... version 6.5, a content-packed update to the Limfinity® framework. , LimitLIS® and other ... more diverse base of customers among labs and other businesses. Limfinity® 6.5 adds ...
(Date:6/20/2017)... Rocky Hill, CT (PRWEB) , ... June 20, ... ... entrepreneurial support, today announced that the CTNext board of directors has formed a ... developed by a working group composed of institution presidents and other high-ranking representatives ...
(Date:6/20/2017)... (PRWEB) , ... June 20, 2017 , ... ... to immediately determine the adulterants which pose the most likely threat to their ... 28 of this year. , IFT's annual food expo attracts over 20,000 ...
(Date:6/20/2017)... ... June 20, 2017 , ... National executive search firm, ... extensive assay development and biomarker expertise, as VP of Scientific Affairs at Cambridge ... in bio-analytical assay development and sample testing services. The organization acts as a ...
Breaking Biology Technology: