Featured Research

from universities, journals, and other organizations

Bifocals may slow progression of nearsightedness in children

Date:
January 12, 2010
Source:
JAMA and Archives Journals
Summary:
Bifocal glasses may be effective in slowing the progression of myopia (nearsightedness) in children with high rates of progression, according to a new study.

Bifocal glasses may be effective in slowing the progression of myopia (nearsightedness) in children with high rates of progression, according to a report in the January issue of Archives of Ophthalmology, one of the JAMA/Archives journals.

Myopia is a common problem among children in many areas of the world, with prevalence as high as 50 percent to 60 percent by age 12 in East Asian countries, according to background information in the article. Prevalence is also high among Asian children living in Western countries. Bifocals -- glasses with two different corrective powers -- and multifocals have been tested as treatments for myopia in children with relatively ineffective results.

Desmond Cheng, O.D., M.Sc., Ph.D., then of the Queensland University of Technology, Brisbaine, Australia, and now of Hong Kong Polytechnic University, Hong Kong, and colleagues conducted a randomized controlled clinical trial among 135 Chinese Canadian children (average age 10.3) in one practice with progressing myopia. Participating children were assigned to one of three treatment groups: 41 wore single-vision lenses, 48 wore bifocals and 46 wore bifocals with prism, which helps the eyes work together.

Of the 135 children, 131 completed the 24-month study. Progression of myopia was most rapid among those who wore single-focus lenses, slower among those who wore bifocals and slowest among those who wore prismatic bifocals.

Because the fundamental characteristics of myopia likely do not vary by ethnic group, the results would likely apply to other children with rapidly progressing forms of the condition, the authors note.

"The proportion of myopic children in this practice with fast myopic progression, therefore qualifying for bifocal treatment, was estimated to be about 54 percent," the authors write. "Therefore, the bifocal treatment could benefit a large number of myopic children."

"To date, there has been no consensus on what magnitude of myopic reduction constitutes a clinically significant control effect," they conclude. "In our opinion, the treatment effect of bifocal and prismatic bifocal lenses of 38 percent and 55 percent, respectively, in this study, though greater than those of others, is still modest. Whether or not the effect tapers off will decide clinical significance. If the treatment effects continued over time, then the treatment could have a significant role in preventing the development of very high pathologic myopia." Therefore, long-term studies are needed, they note.

This work was supported in part by Essilor International of France.


Story Source:

The above story is based on materials provided by JAMA and Archives Journals. Note: Materials may be edited for content and length.


Journal Reference:

  1. Desmond Cheng; Katrina L. Schmid; George C. Woo; Bjorn Drobe. Randomized Trial of Effect of Bifocal and Prismatic Bifocal Spectacles on Myopic Progression: Two-Year Results. Arch Ophthalmol, 2010; 128 (1): 12-19 [link]

Cite This Page:

JAMA and Archives Journals. "Bifocals may slow progression of nearsightedness in children." ScienceDaily. ScienceDaily, 12 January 2010. <www.sciencedaily.com/releases/2010/01/100111162025.htm>.
JAMA and Archives Journals. (2010, January 12). Bifocals may slow progression of nearsightedness in children. ScienceDaily. Retrieved September 16, 2014 from www.sciencedaily.com/releases/2010/01/100111162025.htm
JAMA and Archives Journals. "Bifocals may slow progression of nearsightedness in children." ScienceDaily. www.sciencedaily.com/releases/2010/01/100111162025.htm (accessed September 16, 2014).

Share This



More Health & Medicine News

Tuesday, September 16, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

EU Ministers and Experts Meet to Discuss Ebola Reponse

EU Ministers and Experts Meet to Discuss Ebola Reponse

AFP (Sep. 15, 2014) The European Commission met on Monday to coordinate aid that the EU can offer to African countries affected by the Ebola outbreak. Duration: 00:58 Video provided by AFP
Powered by NewsLook.com
Despite The Risks, Antibiotics Still Overprescribed For Kids

Despite The Risks, Antibiotics Still Overprescribed For Kids

Newsy (Sep. 15, 2014) A new study finds children are prescribed antibiotics twice as often as is necessary. Video provided by Newsy
Powered by NewsLook.com
FDA Eyes Skin Shocks Used at Mass. School

FDA Eyes Skin Shocks Used at Mass. School

AP (Sep. 15, 2014) The FDA is considering whether to ban devices used by the Judge Rotenberg Educational Center in Canton, Massachusetts, the only place in the country known to use electrical skin shocks as aversive conditioning for aggressive patients. (Sept. 15) Video provided by AP
Powered by NewsLook.com
Respiratory Virus Spreads To Northeast, Now In 21 States

Respiratory Virus Spreads To Northeast, Now In 21 States

Newsy (Sep. 14, 2014) The respiratory virus Enterovirus D68, which targets children, has spread from the Midwest to 21 states. Video provided by Newsy
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