Light therapy or phototherapy consists of exposure to specific wavelengths of light using lasers, LEDs, fluorescent lamps, dichroic lamps or very bright, full-spectrum light, for a prescribed amount of time. It has proven effective in treating Acne vulgaris, seasonal affective disorder (SAD), and for some people it has ameliorated delayed sleep phase syndrome. It has recently been shown effective in non-seasonal depression. Proponents claim demonstrable benefits for skin conditions such as psoriasis and, more controversially, a degree of "skin rejuvenation."

Acne vulgaris

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Visible blue light in the range 440nm has been shown to activate porphyrins in Propionibacterium acnes which damage and ultimately kill the bacteria by creating free radicals. Application of the light for 3 consecutive days has been shown to reduce the bacteria in the pores by 99.9%. Since there are few porphorins naturally found in the skin, the treatment is believed safe; although eye protection is necessary due to light sensitive chemicals in the retina. The light is usually created by fluorescent lamps, bright LEDs or dichroic filament bulbs.

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Veterinary Medicine

Check out the Vet Gazette
Thu, 25 Jun 2009 00:00:00 -0700
Stay up-to-date with the College of Veterinary Medicine with the Vet Gazette.
What Makes a Happy Cow?
Tue, 19 May 2009 00:00:00 -0700
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Check out the Vet Gazette
Tue, 19 May 2009 00:00:00 -0700
Stay up-to-date on news in the College of Veterinary Medicine!
Pet Day 2009 is Coming!
Fri, 17 Apr 2009 00:00:00 -0700
Oregon State's College of Veterinary Medicine is pleased to host its 22nd annual Pet Day and Open House on May 2. Check it out! <img class="thumb" src="http://oregonstate.edu/enewsletter/images/petday2009.jpg" alt="Pet Day logo" title="College of Veterinary Medicine hosts Pet Day" />
Oregon State Researchers Monitoring Potential Spread of Fungal Disease
Tue, 17 Mar 2009 00:00:00 -0700
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OSU Researcher to Work with Marion County Youths on Vet Med Project
Wed, 18 Feb 2009 00:00:00 -0800
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