Navigation Links
'Preferred retinal location' may aid rehabilitation in patients with central vision loss
Date:5/27/2013

Philadelphia, Pa. (May 28, 2013) - Perceptual learning techniques may provide a useful new approach to rehabilitation in patients with central vision losstaking advantage of visual plasticity that persists even in old age, according to a special article in the June issue of Optometry and Vision Science, official journal of the American Academy of Optometry. The journal is published by Lippincott Williams & Wilkins, a part of Wolters Kluwer Health.

The paper by Susana T.L. Chung, OD, PhD, FAAO, 2012 recipient of the prestigious Glenn A. Fry Lecture Award, presents new research findings on plasticity of the visual system in older adults with central vision loss. Anthony Adams, OD, PhD, Editor-in-Chief of Optometry and Vision Science, comments: "This award-winning author explored whether the new 'preferred retinal location' (PRL) in these typically older patients adopted important properties of the original fovea and hence provide evidence that even the older brain's visual cortex shows plasticity."

Evidence of 'Visual Plasticity' in Central Vision Loss

Patients with loss of vision in the central part of the visual field face major challenges for daily living. The most common cause is age-related macular degeneration (AMD), which is also the leading cause of blindness in older adults. Central vision loss results from destruction of the fovea the central pit of the retina, where visual acuity is sharpest.

Patients with central vision loss have problems with tasks requiring detailed vision, such as reading and recognizing faces. Although magnification can help, "Alternative rehabilitation strategies need to be developed to improve the functional vision of people with central vision loss, which hopefully will lead to an improved quality of life," Dr Chung writes.

One potentially useful approach is "perceptual learning"improving various aspects of sensory function through repeated practice. Perceptual learning can improve vision in younger patients with amblyopia ("lazy eye"). It was previously thought that older patients, like those with AMD, no longer had enough visual plasticity to benefit from this approach.

Dr Chung's research takes advantage of the fact that people with central vision loss often adopt another location in the maculathe so-called preferred retinal locationto perform visual tasks. She reports a series of experiments "demonstrate[ing] the presence of plasticity in the visual system after bilateral central vision loss, especially at and around the PRL."

May Lead to New Rehab Strategies in Central Vision Loss

These results show that "The visual system for these individuals is still plastic and can be modified through experiences," Dr Chung writes. She tested this hypothesis in a preliminary study of six older adults with central vision loss. In these patients, perceptual learning techniques targeting the PRL led to an average 50 percent increase in reading speed.

However, perceptual learning can't improve visual acuitypatients still needed large-print books or magnification to see print. In addition, they would likely need continued practice in order to retain the improvement in reading speed. Dr Chung concludes, "The presence of this experience-dependent plasticity offers us an exciting opportunity to adopt perceptual learning as an alternative rehabilitative strategy for improving visual functions for people with central vision loss."

Dr. Chung received the 2012 Glenn A. Fry Lecture Award in recognition of her research contributions. This prestigious award was established by American Optometric Foundation to honor Dr. Glenn A. Fry, who contributed so much to the profession of optometry through his writings, teachings, and administrative duties at the Ohio State University.


'/>"/>

Contact: Connie Hughes
Connie.Hughes@wolterskluwer.com
646-674-6348
Wolters Kluwer Health
Source:Eurekalert

Related medicine news :

1. Survey: 85% of Part D Seniors in Preferred Pharmacy Plans are Satisfied With Costs, Pharmacy Choices
2. HUMAN Healthy Vending Is Now a Preferred Vending Partner of the American Association of Cosmetology Schools
3. Southport Family Dental Celebrates it's 14th Year as a Preferred Provider of Invisalign Braces
4. GeneCell International, Miami’s only and Preferred Cord Blood Laboratory, Participates in The Green Baby Fair to Advance the Education in the South Florida Community
5. PREFERRED Therapy Providers Selects WebOutcomes to Deliver Web-Based Outcomes for Their National Provider Network
6. Vyopta Granted Cisco Preferred Solution Developer Partner Status, Highest Level for Cisco Developer Network
7. EnviroTextile’s Hemp Products Listed with USDA Biopreferred Program
8. Coast Chiropractic Center Named as Power Liens Preferred Provider
9. Dr. Tal Morr - a Preferred Prosthodontics in Miami Area
10. Fort Lauderdale Spine & Injury Center Named as Power Liens Preferred Provider
11. Integrated Services Becomes Preferred Rental Provider for Rural/Metro Corporation
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/22/2017)... CT (PRWEB) , ... February 22, 2017 , ... The ... and the 2017 Forecast —on Thursday, February 23, 2017, at 1:00 PM ET. A ... webinar is part of the Interactive Webinar Series. , If you want to find ...
(Date:2/22/2017)... ... February 22, 2017 , ... FPS is a nonprofit mental ... Established in 1977, our organization was at the forefront in working with veterans ... life were evident and served as the catalyst for the establishing the agency. ...
(Date:2/22/2017)... Wis (PRWEB) , ... February 22, 2017 , ... ... a category by itself - the Vector™ Series Multi-Cook Oven offers up to ... oven chamber, featuring exclusive Structured Air Technology™ for unmatched evenness in cooking. Alto-Shaam ...
(Date:2/21/2017)... ... February 21, 2017 , ... Robins & Morton ... Durant, Oklahoma, on Feb. 21. , The celebration began with a ribbon cutting ... employees, the construction team and tribal leadership. , Choctaw Nation Durant Regional ...
(Date:2/21/2017)... , ... February 21, 2017 , ... As recently as ... according to the American Society of Plastic Surgeons. Some patients want to make a ... of their nose and improve their breathing ability. The team at usrhinoplasty.org ...
Breaking Medicine News(10 mins):
(Date:2/22/2017)...  Soligenix, Inc. (Nasdaq: SNGX ) ... focused on developing and commercializing products to treat ... need, announced today that its proprietary formulation of ... for the treatment of psoriasis. The issued patent, ... skin conditions, complements the method of treatment claims ...
(Date:2/21/2017)... NEW YORK , Feb. 21, 2017 /PRNewswire/ ... the full report: http://www.reportlinker.com/p04711309-summary/view-report.html ... current as well as future prospects of the ... companies and intermediaries engaged in the manufacture and ... as well as new entrants planning to enter ...
(Date:2/21/2017)... , Feb. 21, 2017 The global infusion ... of 6.0% from 2016 to 2021, to reach USD ... 2016. Increasing prevalence of chronic diseases along with increasing ... reduce hospital expenditure, steady increase in surgical procedural volumes, ... are some of the key factors driving the growth ...
Breaking Medicine Technology: