Navigation Links
Aging eyes linked to sleepless nights, new study shows
Date:8/31/2011

DARIEN, IL A natural yellowing of the eye lens that absorbs blue light has been linked to sleep disorders in a group of test volunteers, according to a study in the September 1 issue of the journal Sleep. As this type of lens discoloration worsened with age, so did the risk of insomnia.

"The strong link between lens yellowing and age could help explain why sleep disorders become more frequent with increasing age," said Line Kessel, M.D., Ph.D., the study's lead author.

In the Danish study, 970 volunteers had their eyes examined by lens autofluorometry, a non-invasive method for determining how much blue light is transmitted into the retina. Blue light is a portion of the visible-light spectrum that influences the normal sleep cycle by helping initiate the release of melatonin in the brain. Melatonin is a hormone that helps signal to the body when it is time to be sleepy or alert.

Volunteers were considered to have a sleep disorder if they confirmed that they "often suffer from insomnia" or if they purchased prescription sleeping pills within the last 12 months. Of those classified as having a sleep disturbance, 82.8 percent affirmed that they both suffered from insomnia and used sleep medication.

Using this data, researchers calculated an inverse relationship between blue light transmission and the risk of having sleep disturbances: the lower the blue light transmission into the retina due to a yellowing of the eye lens, the greater the risk of sleep disturbances.

"The results showed that while age-related lens yellowing is of relatively little importance for visual function, it may be responsible for insomnia in the elderly," said Kessel, a senior scientist in the Department of Opthalmology at Glostrup Hospital in Denmark.

Significantly higher rates of sleep disorders were reported by older participants, women, smokers and those with diabetes mellitus. Previous studies have shown that the rate of lens aging is accelerated in smokers, patients with diabetes mellitus and those at high risk for ischemic heart diseases. The Danish researchers addressed these factors in their statistical analyses.

"The association between blue light lens transmission and sleep disturbances remained significant even after we corrected for age, sex, diabetes mellitus, smoking and the risk of ischemic heart disease," Kessel said.

She said another important factor to consider is that sleep quality has been shown to improve after cataract surgery. "The transmission of blue light currently cannot be improved by any other method than cataract surgery. Im involved with another research project where we try non-invasively to remove the yellow color of the lens using a laser, but the method is not yet developed for clinical use," Kessel said.

In the meantime, Kessel said it seemed prudent to recommend that physicians reconsider the prescription of sleeping tablets in patients who have undergone cataract surgery.


'/>"/>

Contact: Doug Dusik
ddusik@aasmnet.org
630-737-9700
American Academy of Sleep Medicine
Source:Eurekalert

Related medicine news :

1. Researchers share discoveries about aging-related changes in health and cognition
2. For Women, Active Sex Life May Mean Better Aging
3. Aging authorities differ on tweaks to Social Securitys benefit structure
4. New imaging test gives physicians better tool to diagnose Parkinsons disease
5. Sexual satisfaction tied to overall successful aging as reported by women age 60 to 89
6. U of T research shows anti-aging techniques not yet viewed as acceptable
7. Imaging probe allows noninvasive detection of dangerous heart-valve infection
8. University of Kentucky Sanders-Brown Center on Aging receives $7 million from NIA
9. Jette to receive GSAs 2011 Excellence in Rehabilitation of Aging Persons Award
10. UCI-led study links prenatal exposure to stress with accelerated cell aging
11. New high-speed 3-D imaging system holds potential for improved cancer screening
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/11/2016)... ... 11, 2016 , ... "What holds you back from ... a question as a challenge for his readers to examine the full scale ... (published by Partridge Singapore), Clarke explores the subject with more depth, revealing time-honored ...
(Date:2/11/2016)... , ... February 11, 2016 , ... ... of a master charity program created to assist the people of their local ... closely with nonprofit organizations and community leaders. Their hope is to bring awareness ...
(Date:2/11/2016)... ... February 11, 2016 , ... Talix today announced ... , will be presenting at the 2016 HIMSS Annual Conference & Exhibition, taking ... During his session, “ Coding for Care: Using Data Analytics for Risk Adjustment ...
(Date:2/11/2016)... ... 11, 2016 , ... The annual list showcases the 20 Most Promising SharePoint ... dedication and commitment to the SharePoint ecosystem. A panel of experts and members ... is to recognize and promote technology entrepreneurship. , The survey was made at ...
(Date:2/11/2016)... D.C. (PRWEB) , ... February 11, 2016 , ... ... will be exhibiting at the American Academy of Dermatology Annual Meeting at the ... USA's goal is to raise awareness for both the condition of hyperhidrosis (excessive ...
Breaking Medicine News(10 mins):
(Date:2/11/2016)... DIEGO , Feb. 11, 2016 ... groundbreaking cell-isolation method that opens the door to ... until now have been impossible to isolate with ... to isolate specific tumor types in various stages ... genetic variants of these cells that are clinically ...
(Date:2/11/2016)... , Feb. 11, 2016  AcelRx Pharmaceuticals, Inc. ... presentation will be made at the 38th annual ... Wound Care Symposium, which is being held February 14-18, ... conference covers the latest advancements in wound healing, burn ... American Burn Association, Australian-New Zealand Burns Association, Academy of ...
(Date:2/11/2016)... 11, 2016  Ampio Pharmaceuticals, Inc. (NYSE MKT: AMPE) ... into a Controlled Equity Offering SM Sales Agreement ... Michael Macaluso , Chairman and CEO, stated "During our ... not currently raising money and that we have enough ... and still complete all of our current objectives and ...
Breaking Medicine Technology: