Beyond 'blur': Image quality shapes eye growth, but limited criteria apply

The growth of the eye in childhood is not predetermined--it is dependent on a local feedback system within the eye itself that takes into account the quality of images formed on the retina. In general, the eye grows in an effort to keep the retinal image in good focus. In findings reported this week, researchers investigated which aspects of retinal images are used by this feedback system. They found that among the numerous image qualities that contribute to our sense of blur, only a subset of these qualities are used in the feedback system that controls eye growth. The findings suggest that the activity of only certain retinal cells may be necessary to drive the feedback system.

The findings are reported in the April 4th issue of Current Biology by a team including Robert Hess of McGill University.

Images of everyday scenes are composed of different grades of spatial details--different "spatial frequencies" --that occur at different absolute and relative contrasts. In the study, the researchers asked whether the feedback system that regulates eye growth took into account all this information, or just used a part of it. By presenting young chickens with synthetic images that had similar properties to everyday natural images, the researchers were able to independently manipulate each of these image properties and evaluate the effect on eye growth.

The researchers' first finding was that the different spatial frequencies that occur in images and define localized details, such as edges and lines, are not used by the feedback system to regulate eye growth, despite the fact that these qualities are very important for image recognition. The second finding was that the feedback system does not take into account all grades of spatial detail that are present in a scene, but only the finest detail present, to regulate eye growth. What makes these findings interesting is that our everyday perception of what is blurred is computationally more elaborate

Contact: Heidi Hardman
Cell Press

Page: 1 2

Related biology news :

1. Beyond batteries: Storing power in a sheet of paper
2. Beyond Mesopotamia: A radical new view of human civilization reported in Science
3. Beyond the DNA: Chemical signatures reveal genetic switches in the genome
4. Beyond nature vs. nurture: Williams syndrome across cultures
5. Beyond the book: Software automates access to brain atlases
6. Beyond lipids: understanding the mechanics of atherosclerosis
7. Beyond genes: Lipid helps cell wall protein fold into proper shape
8. Beyond lithium for bipolar disorder
9. 2007 Image of the Year: Molecular imaging relates human brain chemistry to aggressive behavior
10. Depiction of findings selected as 2007 Image of the Year by Society for Nuclear Medicine
11. Images develop clinical applications for new DESI technology

Post Your Comments:

(Date:8/26/2020)... ... August 25, 2020 , ... Catalent, the leading global provider ... gene therapies, and consumer health products, today announced that two Catalent Biologics experts ... taking place between Aug. 31 – September 4, 2020. , On Wednesday, Sept. ...
(Date:8/21/2020)... ... 18, 2020 , ... Sentien Biotechnologies, Inc., a clinical-stage biotechnology ... and Drug Administration (FDA) has approved the company’s Investigational New Drug (IND) application ... COVID-19. Approval of this IND allows Sentien to initiate a Phase 1/2 study ...
(Date:8/21/2020)... ... August 20, 2020 , ... ... Movahhed , a Clinical Operations executive with expertise in clinical trial planning and ... firm as an Expert Consultant. Throughout his career, Mr. Movahhed has helped design ...
Breaking Biology News(10 mins):
(Date:8/3/2020)... ... , ... ERT, the global leader in clinical ... one of the 100 most inspiring individuals in the life-sciences industry by PharmaVoice. ... on how they have inspired their colleagues and affected positive changes in their ...
(Date:7/31/2020)... ... July 29, 2020 , ... Anomet ... to three different materials for use with CRM, neurostimulation, vascular, and related devices. ... to meet specific design requirements, performance, and cost criteria; especially where solid wire ...
(Date:7/22/2020)... TORONTO (PRWEB) , ... July 22, 2020 , ... Join ... and John Lorenc, Sr. Manager Regulatory Solutions, in a one hour live webinar ... is the regulating body in China for drugs and medical devices. Specifically, for medical ...
(Date:7/10/2020)... ... July 08, 2020 , ... ... announces a significant expansion of laboratory operations through its COVID-19 testing service, ... testing programs. , Bode-CARES provides a turnkey solution that includes ...
Breaking Biology Technology:
Cached News: