Experts are concerned that blue light wavelengths emitted from bright light therapy lamps contribute
to the development of age related blindness.
The low intensity GreenLIGHT technology used in Lo-LIGHT therapy lamps eliminates the risk of retinal damage from bright light or blue light therapy lamps. Lo-LIGHT lamps operate at normal indoor light intensity and do not emit the hazardous blue wavelengths of light that damage the retina.
People using bright light or blue light therapy while taking photosensitizing medications
have an increased risk of eye damage. Medications that sensitize the eye to damage by blue light include
nonsteroidal anti-inflammatory drugs (NSAIDs), antidepressants, antibiotics, diuretics, beta-blockers
and other heart medications.
A case report in the American Journal of Psychiatry describes a person who combined bright light
therapy and an antidepressant. After five days of using bright light therapy the patient suffered a "marked reduction in
visual acuity contrast sensitivity." Retinal examination found lesions in the retinas of both eyes.
People with increased risk of vision loss from bright or blue light therapy include those with diabetes
and others with a heightened susceptibility for retinal damage. Older people are also more susceptibile to retinal damage from
blue light because of the age-related decline in retinal repair mechanisms that occurs after age 40.
Exposure to blue visible light causes oxidative damage in the retina. Material from this oxidative
damage accumulates in the retina over a lifetime and is related to the development of Age-related Macular Degeneration.
AMD affects the vision of 14 milion Americans and is the leading cause of irreversible blindness in developed countries.
Impaired vision can be particularly difficult for people suffering from depression. Herbert Kern, the first
person to use bright light therapy, described in the journal Science how light therapy became less and less
effective for him over the years as his eyesight faded because of his developing AMD. He explained, "Now I can hardly see,
and all hell has broken loose" "I have had periods of depression lasting over a year..."
See Part II - Light exposure and AMD
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