Featured Research

from universities, journals, and other organizations

Study offers hope for more effective treatment of nearsightedness

Date:
June 5, 2012
Source:
University of Houston
Summary:
Research by optometrists supports the continued investigation of optical treatments that attempt to slow the progression of nearsightedness in children. The study compared the effects of wearing and then not wearing no-line bifocals in children with myopia.

UH College of Optometry's David Berntsen's study compared the effects of wearing and then not wearing no-line bifocals in children with myopia. His results support the continued investigation of optical treatments that attempt to slow the progression of nearsightedness in children.
Credit: Courtesy of The Ohio State University

Research by an optometrist at the University of Houston (UH) supports the continued investigation of optical treatments that attempt to slow the progression of nearsightedness in children.

Conducted by UH College of Optometry assistant professor David Berntsen and his colleagues from The Ohio State University, the study compared the effects of wearing and then not wearing progressive addition lenses, better known as no-line bifocals, in children who are nearsighted. With funding by a National Institutes of Health National Eye Institute training grant and support from Essilor of America Inc. and the American Optometric Foundation Ezell Fellowship program, the study examined 85 children from 6-11 years old over the course of two years.

The results were published in Investigative Ophthalmology and Visual Science.

Selected according to their eye alignment and accuracy of focusing on near objects, the myopic children were fitted with either normal single-vision lenses or no-line bifocals to correct their nearsightedness. In addition to observing and testing the children, the doctors obtained feedback from parents and guardians of both the children's outdoor activities and near-work tasks, such as reading and computer use.

Previous research suggested that nearsighted children who do not focus accurately when reading books or doing other near work may benefit more from wearing no-line bifocal glasses than nearsighted children who focus more accurately. Berntsen's study found a small, yet statistically significant, slowing of myopia progression in children wearing the bifocals compared to those who simply wore single-vision lenses. Berntsen asserts, however, that the results do not suggest that children be fitted with no-line bifocal lenses solely for the purpose of slowing the progression of myopia.

"While the small effect found in the group of children wearing bifocal spectacles does not warrant a change in clinical practice, we found the beneficial effect was still present for at least one year after children stopped wearing no-line bifocal lenses," Berntsen said. "This is promising if other optical lens designs can be developed that do an even better job of slowing how fast myopia increases in children."

By understanding why different types of lenses result in the slowing of myopia progression, Berntsen says researchers will be better able to design lenses that may be more effective in slowing the increase of nearsightedness in children.

"Single-vision lenses are normally prescribed when a child gets a pair of glasses, but glasses with progressive addition lenses were shown to slightly reduce myopic progression in our study," Berntsen said. "For any treatment that reduces myopia progression in children to be useful, the effect of the spectacles or contact lenses must persist after children stop wearing them. The fact that the small treatment effect from our study was still present one year after discontinuing the treatment is promising. The results suggest that if newer optical designs currently being investigated do a better job of slowing myopia progression, the effects may be expected to persist and decrease how nearsighted the child ultimately becomes."

An important goal of this study, in particular, was to help them improve their understanding of the mechanism behind myopia progression in children and why no-line bifocals cause this small reduction in its progression. Berntsen says the study results and evidence from other studies suggest that lenses specifically designed to change blur in the eye's peripheral vision may be able to slow the increase of nearsightedness.

"There is support for continuing to investigate new lenses specially designed to change the blur profile on the back of the eye in order to reduce the increase of myopia in children," Berntsen said. "There is still further research to be done, but our work is an important step in discovering the methods needed to slow the progression of nearsightedness."


Story Source:

The above story is based on materials provided by University of Houston. Note: Materials may be edited for content and length.


Journal Reference:

  1. D. A. Berntsen, L. T. Sinnott, D. O. Mutti, K. Zadnik. A Randomized Trial Using Progressive Addition Lenses to Evaluate Theories of Myopia Progression in Children with a High Lag of Accommodation. Investigative Ophthalmology & Visual Science, 2011; 53 (2): 640 DOI: 10.1167/iovs.11-7769

Cite This Page:

University of Houston. "Study offers hope for more effective treatment of nearsightedness." ScienceDaily. ScienceDaily, 5 June 2012. <www.sciencedaily.com/releases/2012/06/120605172038.htm>.
University of Houston. (2012, June 5). Study offers hope for more effective treatment of nearsightedness. ScienceDaily. Retrieved July 24, 2014 from www.sciencedaily.com/releases/2012/06/120605172038.htm
University of Houston. "Study offers hope for more effective treatment of nearsightedness." ScienceDaily. www.sciencedaily.com/releases/2012/06/120605172038.htm (accessed July 24, 2014).

Share This




More Health & Medicine News

Thursday, July 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

New Painkiller Designed To Discourage Abuse: Will It Work?

New Painkiller Designed To Discourage Abuse: Will It Work?

Newsy (July 24, 2014) The FDA approved Targiniq ER on Wednesday, a painkiller designed to keep users from abusing it. Like any new medication, however, it has doubters. Video provided by Newsy
Powered by NewsLook.com
Doctor At Forefront Of Fighting Ebola Outbreak Gets Ebola

Doctor At Forefront Of Fighting Ebola Outbreak Gets Ebola

Newsy (July 24, 2014) Sheik Umar Khan has treated many of the people infected in the Ebola outbreak, and now he's become one of them. Video provided by Newsy
Powered by NewsLook.com
Condemned Man's US Execution Takes Nearly Two Hours

Condemned Man's US Execution Takes Nearly Two Hours

AFP (July 24, 2014) America's death penalty debate raged Thursday after it took nearly two hours for Arizona to execute a prisoner who lost a Supreme Court battle challenging the experimental lethal drug cocktail. Duration: 00:55 Video provided by AFP
Powered by NewsLook.com
China's Ageing Millions Look Forward to Bleak Future

China's Ageing Millions Look Forward to Bleak Future

AFP (July 24, 2014) China's elderly population is expanding so quickly that children struggle to look after them, pushing them to do something unexpected in Chinese society- move their parents into a nursing home. Duration: 02:07 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

    Health News

      Environment News

        Technology News



          Save/Print:
          Share:

          Free Subscriptions


          Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

          Get Social & Mobile


          Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

          Have Feedback?


          Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
          Mobile: iPhone Android Web
          Follow: Facebook Twitter Google+
          Subscribe: RSS Feeds Email Newsletters
          Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins