Infrared light stops eye damage caused by bright lightsMay 14th, 2012 - 1:52 pm ICT by IANS
Sydney, May 14 (IANS) Treating eyes with gentle infrared light can help prevent damage caused by subsequent exposure to bright light, says a study.
A breakthrough by The Vision Centre at the Australian National University can protect the vision of people exposed to bright sunlight or artificial lights, namely construction workers, sportspeople, fishermen, farmers, welders, actors, entertainers and others.
Krisztina Valter and doctoral researcher Rizalyn Albarracin at The Vision Centre have shown that pre-treatment with near infrared light (NIR) prevents a build-up of scar tissue in the retina causing subsequent harm to sight, the journal Photochemistry and Photobiology reported.
“There’s a group of cells that look after our vision and work behind the scenes called Muller cells,” said Albarracin. “They act to protect the retina by clearing toxins and inducing healing whenever there is injury to the vision cells.”
“However, their protection is a double-edge sword for the eyes. When the retina comes under extreme stress, as when it is exposed to intensely bright light and loses a large number of vision cells, the Muller cells can over-react by multiplying and forming scar tissue behind the retina,” she said, according to a university statement.
“When this occurs, two things happen: first, the vision cells close to where the scar tissue forms will stop working. Secondly, the scar tissue blocks the blood supply to the outer retina, so that other vision cells are starved of oxygen, glucose and other nutrients vital to their survival,” said Albarracin.
“As a result more vision cells die, which in turn provokes Muller cells to work even harder, forming more scar tissues and setting up a vicious cycle,” added Albarracin.
“We found that the treatment with mild NIR successfully inhibits the Muller cells from multiplying and forming scar tissue,” said team leader Valter.
Researchers used an array of small LEDs (light emitting diodes) that have been tuned to produce near infrared light at a specific wavelength - 670 nanometres.
- Near infra-red light can heal damaged vision - Apr 20, 2011
- Non-invasive method to heal damaged vision developed - Oct 13, 2010
- Infrared light heals vision damaged by Parkisnon's - Aug 03, 2012
- Simple painless treatments could protect eye in old age - Apr 22, 2009
- Prosthetic retina shows promise in restoring sight - May 18, 2012
- Blind man's sight restored after 55 years - Jun 18, 2011
- How light can be used in medical therapy - Mar 31, 2009
- Invisible infrared light could soon activate heart, ear cells - Mar 28, 2011
- New hope for restoring vision in the blind - Sep 22, 2010
- Healing damaged liver tissues - Dec 05, 2011
- Head patch can monitor strokes better - Feb 02, 2012
- Electronic implants to give sight back to blind - Nov 03, 2010
- Why watching a sunrise takes our breath away - Nov 06, 2010
- Compound likely to regenerate vision in humans - Jul 26, 2012
- Master mechanism behind regeneration of body parts discovered - Oct 20, 2009
Tags: albarracin, blood supply, bright lights, bright sunlight, construction workers, doctoral researcher, double edge sword, entertainers, extreme stress, eye damage, fishermen, infrared light, muller cells, outer retina, photochemistry and photobiology, scar tissue, scar tissues, tissue blocks, vicious cycle, vision centre