Navigation Links
Efforts To Replace Reading Glasses Are In View

ANN ARBOR, Mich.---It's 10 p.m., and you've finally relaxed into your favorite comfy chair to review the day's news. Patting your shirt pockets you realize// there's a problem, and now you're not in a mood to relax anymore. You can't find your reading glasses. Again!

Presbyopia---the inability to focus on close objects resulting in blurred vision---affects 100 percent of people by age 50. Historically, laser correction of the intraocular lens for presbyopia has been proposed, but it is risky because there is no way to monitor the procedure---no way for ophthalmologists to see what they are doing to the lens being cut.

But a tool developed at the University of Michigan allows for a potentially noninvasive, painless fix to presbyopia using tiny bubbles that help ophthalmologists reshape the eye's lens and restore its flexibility and focusing ability. Matthew O'Donnell, professor and chair of the U-M Department of Biomedical Research, along with Kyle Hollman, assistant research scientist and adjunct lecturer, and graduate student Todd Erpelding, developed the method. Recently, it was successful when tested in pig lenses.

Presbyopia usually starts around age 40, O'Donnell says. The predominant belief is that fibers created in the intraocular lens accumulate and stiffen, thus making the lens less flexible. Without that flexibility, the lens can't change shape to focus on near objects, a process called accommodation.

So, while a young eye is like an automatic focus camera, the presbyopic eye can be thought of as a fixed focus camera, he says. One way to potentially solve presbyopia is to laser away some fibers to restore flexibility, but there is no way to know how much or where to cut, he adds.

‘There are no noninvasive or minimally invasive procedures for presbyopia,’ said O'Donnell, 55, who explained that he started research on presbyopia when he began to notice his own near-sight failing. He held up his reading glasses : ‘I got sick of wearing these things.’

The U-M tool uses bubbles, ultrafast optics and ultrasound to measure the thickness and rigidity of the lens during laser surgery, thus guiding the surgeon as they reshape the lens. It's a new application for microscale bubbles, which scientists have experimented with for years in the areas of drug delivery, tumor destruction and other medical applications.

For the treatment of presbyopia, the U-M team used ultrafast laser pulses to create tiny gas bubbles within the intraocular lens. Before the bubbles diffuse, researchers hit them with high frequency sound waves, which push the bubbles against neighboring lens fibers.

‘Part of the sound is reflected, and from the characteristic of the reflection, you know where the bubble is,’ O'Donnell said. ‘It uses exactly the same technology as ultrasound imaging.’

In this way, researchers measure how far the bubbles have moved based on the force applied, and thus measure the pliability of the lens.

on the force applied, and thus measure the pliability of the lens.

‘The bubbles show you where the laser should cut,’ O'Donnell said. ‘If it's still too hard, you cut some more. If it's soft enough, you stop.’

The future plan is to automate the procedure to quickly cover the entire lens with bubbles, he said. The team, which will begin testing this year, is talking with several companies about commercial opportunities.

Source: urekalert
'"/>




Related medicine news :

1. Asian Nations To Take Joint Efforts Against H5N1
2. Bihar CM Calls For Concerted Efforts To Tackle HIV/AIDS Menace
3. Travel And Tourism Industry Calls For Global Efforts To Limit Sexual Trafficking Of Children
4. Health Minister Praises Efforts By NHS In Reducing Patient Waiting Time
5. Efforts To Vanquish Skin Disease Among Infants
6. Efforts to Check Uncontrolled use of Antibiotics and Antibiotic Resistance
7. Physicians Enlisted in Efforts to Keep Demented Drivers Off the Road
8. Heart Disease, Stroke Prevention Efforts Among Women
9. WHO Calls for Greater Efforts to Fight TB
10. Efforts Underway to Fight Alcoholism Among Tribals
11. U.N. Officials Call on Countries To Strengthen HIV/AIDS Prevention Efforts
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:10/13/2017)... ... October 13, 2017 , ... PurhealthRX , a leading ... Purzorb™ technology. Applying the Purzorb™process to full spectrum CBD oil will revolutionize the rapidly ... CBD form that can be easily incorporated into liquid products, while reducing costs to ...
(Date:10/13/2017)... , ... October 13, 2017 , ... Lori R. Somekh, ... member of ElderCounsel, a national organization of elder law and special needs planning attorneys. ... and rules. It also provides a forum to network with elder law attorneys nationwide,” ...
(Date:10/13/2017)... (PRWEB) , ... October 13, 2017 , ... Many families ... However, many long-term care insurance companies have a waiver for care if the client ... elimination period, when the family pays for care, is often waived, so the benefits ...
(Date:10/13/2017)... ... , ... Ellevate Network, the leading network for professional women, brought together some ... at their inaugural Summit in New York City in June. The event was livestreamed ... over 3 million. To watch the Mobilize Women video, click here . ...
(Date:10/13/2017)... ... , ... Yisrayl Hawkins, Pastor and Overseer at The House of Yahweh, has ... least understood books in the Holy Scriptures, Revelation. The Book of Revelation paints a ... centuries. Many have tossed it off as mere rubbish, but Yisrayl Hawkins says that ...
Breaking Medicine News(10 mins):
(Date:10/4/2017)... , Oct. 4, 2017  South Korean-based healthcare ... CPR training aide "cprCUBE" on Kickstarter. The device will ... during cardiac arrests with better efficiency compared to the ... offers real-time feedback on efficacy of the compression for ... campaign has a goal to raise $5,000. ...
(Date:10/2/2017)...  AllianceRx Walgreens Prime, the combined central specialty pharmacy ... benefit manager Prime Therapeutics LLC (Prime), today officially began ... unveiling of new signage at its headquarters in ... a few other company-owned facilities across the country. This ... of whom will begin to see the AllianceRx Walgreens ...
(Date:9/27/2017)... , Sept. 27, 2017  Commended for their devotion to ... awards. Ranked as number one in the South Florida Business ... in Inc. 5000 yearly list, the national specialty pharmacy has ... Armando Bardisa will soon be honored by SFBJ as ... Set to receive his award in October, ...
Breaking Medicine Technology: