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Light Therapy and Eye Safety PART II:
AMD - Age Related Blindness and Light

Age-Related Macular Degeneration (AMD) is the leading cause of blindness in North America. Repeated exposure to high levels of light combined with the deterioration of anti-oxidative protective mechanisms that occurs with age contribute to the development of oxidative debris within the retina and in the region immediately adjacent to it. AMD results from the accumulation of some of this oxidative debris being deposited along the blood-retinal barrier which inhibits the flow of oxygen and nutrients to photoreceptor cells, and limits the transfer of waste material from the retina into the blood stream. Some investigators link the development of AMD with the levels of visible light exposure for at least the twenty year period before symptoms emerge. More recently, evidence indicates that increasing daily exposure to blue visible light of young adults may advance the onset of AMD by 10 years. Refs.

Over a lifetime, exposure to light, particularly visible blue wavelengths of light, can overpower the protective anti-oxidative mechanisms in the retina. Excessive light exposure induces the formation of lipofuscin, oxidative debris that develops within retinal pigment epithelium (RPE) cells, a monolayer of cells located between the photoreceptor cells and Bruch's membrane. Bruch's membrane is a structure adjacent to the RPE that separates the retina from the blood vessels that service the photorecptor cells and the RPE. Oxidative stress within RPE cells results in the formation of drusen, which forms in the extra-cellular space between the retinal pigment epithelium (RPE) and Bruch's membrane. Drusen also appears to contain oxidative debris generated in photoreceptor cells and and RPE cells. Refs.


The comfortable glow from a Lo-LIGHT lamp makes light therapy safe for anyone who can tolerate normal indoor lighting.

FOR THERAPISTS AND EYE SAFETY EXPERTS: For a more technical and complete discussion of the role of light in the pathogenesis of AMD - please see Blue Light and AMD


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Purchase or "No Risk" Rental Plans

In North America, a no-risk rental program is available on some models. If the unit is purchased within 2 months from the time of rental, all rental payments are applied towards the purchase price. Order Now!

The Sunnex Biotechnologies Lo-LIGHT phototherapy lamp comes with a five year warranty. Details