Featured Research

from universities, journals, and other organizations

UMR Researcher Sets Sights On Improving Vision

Date:
November 19, 2005
Source:
University Of Missouri-Rolla
Summary:
A University of Missouri-Rolla researcher has teamed up with a St. Louis ophthalmologist to help those who suffer from cataracts by studying the elasticity of lenses. The leading cause of visual loss in adults age 55 and older, cataracts occur when the normally clear ocular lens in an eye becomes cloudy. As the cataract progresses, a person’s vision becomes blurrier, requiring surgery to replace the lens.

Cataracts occur when the normally clear ocular lens in an eye becomes cloudy.
Credit: Image courtesy of the National Eye Institute, National Institutes of Health

A University of Missouri-Rolla researcher has teamed up with a St. Louis ophthalmologist to help those who suffer from cataracts by studying the elasticity of lenses.

The leading cause of visual loss in adults age 55 and older, cataracts occur when the normally clear ocular lens in an eye becomes cloudy. As the cataract progresses, a person’s vision becomes blurrier, requiring surgery to replace the lens.

“The natural lens has an onion-like structure with layers of arch-like fibers,” explains Dr. Kai-Tak Wan, assistant professor of mechanical and aerospace engineering at UMR. “These layers deform in concert to allow accommodate focusing on objects.”

Once the lens is replaced, a patient’s focus is fixed because an artificial lens is less flexible than a natural lens and limits the range of focus.

“After surgery, patients need to wear glasses to correct their vision, either for nearsightedness or farsightedness,” Wan adds.

Wan and Dr. Nathan Ravi, director of ophthalmology for Veterans Affairs Medical Center at Barnes Jewish Hospital, are using lenses from pigs and human cadavers to characterize the force needed to stretch lenses and allow for the maximum range of focus. The same technique is also used to characterize prosthetic lenses.

Wan and Ravi expect to develop a new prosthetic hydrogel that simulates the optical and mechanical properties of a natural lens.

The study of the mechanical behavior of lenses has significant impact on other eye problems, including presbyopia, a condition that describes the eye’s gradual loss of its ability to change focus from distance to near.

An estimated 440,000-plus Missouri residents age 40 and older either have a cataract or have had cataract surgery, according to the National Institutes of Health.


Story Source:

The above story is based on materials provided by University Of Missouri-Rolla. Note: Materials may be edited for content and length.


Cite This Page:

University Of Missouri-Rolla. "UMR Researcher Sets Sights On Improving Vision." ScienceDaily. ScienceDaily, 19 November 2005. <www.sciencedaily.com/releases/2005/11/051117173815.htm>.
University Of Missouri-Rolla. (2005, November 19). UMR Researcher Sets Sights On Improving Vision. ScienceDaily. Retrieved July 25, 2014 from www.sciencedaily.com/releases/2005/11/051117173815.htm
University Of Missouri-Rolla. "UMR Researcher Sets Sights On Improving Vision." ScienceDaily. www.sciencedaily.com/releases/2005/11/051117173815.htm (accessed July 25, 2014).

Share This




More Health & Medicine News

Friday, July 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Beatings and Addiction: Pakistan Drug 'clinic' Tortures Patients

Beatings and Addiction: Pakistan Drug 'clinic' Tortures Patients

AFP (July 24, 2014) A so-called drugs rehab 'clinic' is closed down in Pakistan after police find scores of ‘patients’ chained up alleging serial abuse. Duration 03:05 Video provided by AFP
Powered by NewsLook.com
Too Few Teens Receiving HPV Vaccination, CDC Says

Too Few Teens Receiving HPV Vaccination, CDC Says

Newsy (July 24, 2014) The Centers for Disease Control and Prevention is blaming doctors for the low number of children being vaccinated for HPV. Video provided by Newsy
Powered by NewsLook.com
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

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