Featured Research

from universities, journals, and other organizations

Nearsighted Children May Benefit From Rigid Contact Lenses

Date:
December 24, 2004
Source:
Ohio State University
Summary:
New research suggests that rigid gas permeable contact lenses may help slow the progression of nearsightedness, or myopia, in young children.

COLUMBUS, Ohio – New research suggests that rigid gas permeable contact lenses may help slow the progression of nearsightedness, or myopia, in young children.

At the end of a three-year study of more than a hundred 8- to 11-year olds, researchers determined that wearing rigid gas permeable (RGP) contact lenses slowed the progression of myopia by nearly 30 percent, compared to soft contact lens wear.

Only recently did researchers find that young children could handle the responsibility of wearing contact lenses.

The corneas of the rigid contact lens wearers did not change as much as those of the soft contact lens wearers. This difference, which is not thought to be a permanent change, explains part of the difference between the RGP and soft contact lens wearers, said Jeffrey Walline, the study's lead author and an adjunct assistant professor of optometry at Ohio State University.

He and his colleagues caution that the RGP lenses won't stop myopia in its tracks, and also that the effects of these lenses probably aren't permanent. But the researchers also say that RGP lenses could be a good option for nearsighted children who can adapt to wearing them.

"Severe myopia, which is fairly rare, can lead to a detached retina and permanent vision loss or glaucoma," Walline said. "Theoretically, wearing RGP contact lenses could lessen the severity of myopia, and likewise the chances of developing one of these problems.

"But it's also a matter of convenience – keeping myopia's progression in check may mean that a child can see his bedside clock, or walk to the bathroom in the middle of the night without having to depend on glasses."

The study appears in the December 2004 issue of the journal Archives of Opthalmology.

While myopia can develop at any age, it most often begins during childhood, around ages 6 to 8. Progression typically slows by the mid-teens.

The researchers evaluated 116 children who participated in the Contact Lens and Myopia Progression (CLAMP) Study at Ohio State. All children were given about two months to adapt to wearing the rigid contact lenses before the study officially began.

"It takes most children about two weeks to get used to this type of contact lens," Walline said. "We wanted to make sure the children could wear the rigid lenses for the long-term."

At the end of the two-month initiation period, children were randomly assigned to wear RGP contact lenses or two-week disposable soft contact lenses. Children returned to the optometry clinic each year for three years for annual vision checkups.

A nearsighted eye is typically longer than a normal eye, which results in blurred vision when looking at distant objects.

"To have a permanent effect, contact lenses would ideally slow the growth of the eyeball," Walline said. "The RGP contact lenses did not do that. However, they did maintain the shape of the cornea, whereas the cornea of the soft contact lens wearers became more curved. This increased corneal curve resulted in more myopia in the group that wore soft contact lenses."

The children in both groups wore their lenses an average of 70 hours a week. The researchers aren't sure how many hours a day a child would have to wear RGP lenses in order to slow the progression of nearsightedness.

"Rigid contact lenses may offer visual and eye health benefits that many soft contact lenses don't," Walline said. "These harder lenses allow more oxygen to reach the cornea than do most soft contact lenses, and they do a better job of correcting astigmatism.

"These factors, in addition to the modest myopia control, should be weighed against the initial discomfort that sometimes goes along with RGP lens wear when deciding what a child should use to correct his vision problems."

The current study also suggests that about four out of five children can adapt to wearing RGP lenses, which cost about $160 a year, Walline said. For comparison, disposable contact lenses – like the kind used in this study – cost about $260 a year.

Walline conducted the CLAMP study with Ohio State optometry colleagues Lisa Jones, Donald Mutti and Karla Zadnik, the Glenn A. Fry professor of optometry.

The CLAMP Study received funding from the National Eye Institute; Menicon Co, Ltd, CIBA Vision Corporation, and SOLA Optical – all contact lens manufacturers; and an American Optometric Foundation William C. Ezell Fellowship. The authors have no relevant financial interest in the sponsors of the study.


Story Source:

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


Cite This Page:

Ohio State University. "Nearsighted Children May Benefit From Rigid Contact Lenses." ScienceDaily. ScienceDaily, 24 December 2004. <www.sciencedaily.com/releases/2004/12/041219143720.htm>.
Ohio State University. (2004, December 24). Nearsighted Children May Benefit From Rigid Contact Lenses. ScienceDaily. Retrieved July 30, 2014 from www.sciencedaily.com/releases/2004/12/041219143720.htm
Ohio State University. "Nearsighted Children May Benefit From Rigid Contact Lenses." ScienceDaily. www.sciencedaily.com/releases/2004/12/041219143720.htm (accessed July 30, 2014).

Share This




More Health & Medicine News

Wednesday, July 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Generics Eat Into Pfizer's Sales

Generics Eat Into Pfizer's Sales

Reuters - Business Video Online (July 29, 2014) Pfizer, the world's largest drug maker, cut full-year revenue forecasts because generics could cut into sales of its anti-arthritis drug, Celebrex. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Nigeria Ups Ebola Stakes on 1st Death

Nigeria Ups Ebola Stakes on 1st Death

Reuters - Business Video Online (July 29, 2014) Nigerian authorities have shut and quarantined a Lagos hospital where a Liberian man died of the Ebola virus, the first recorded case of the highly-infectious disease in Africa's most populous economy. David Pollard reports Video provided by Reuters
Powered by NewsLook.com
Running 5 Minutes A Day Might Add Years To Your Life

Running 5 Minutes A Day Might Add Years To Your Life

Newsy (July 29, 2014) According to a new study, just five minutes of running or jogging a day could add years to your life. Video provided by Newsy
Powered by NewsLook.com
Ebola Outbreak Poses Little Threat To U.S.: CDC

Ebola Outbreak Poses Little Threat To U.S.: CDC

Newsy (July 29, 2014) The Ebola outbreak in West Africa poses little threat to Americans, according to officials with the Centers for Disease Control and Prevention. 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