The light used is a natural violet or blue light, and it’s considered to be an alternative treatment. Blue light therapy can only treat areas that the light can reach.
The fact that blue light penetrates all the way to the retina (the inner lining of the back of the eye) is important, because laboratory studies have shown that too much exposure to blue light can damage light-sensitive cells in 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.
The most popular use of blue light therapy today is for the treatment of mild to moderate inflammatory acne. Blue light kills acne bacteria quickly, naturally, and without side effects. We have over 10 years experience with blue light therapy for acne. Visit our Blue Light Therapy for Acne page for every detail.
Part of the visible light spectrum, blue light is the high-energy light just beyond the potentially harmful ultraviolet light. Blue light is normally transmitted through the eye to the retina, because it is visible light that our eyes are designed to receive. Light is visible to the eye and triggers the visual process that leads to vision and sight.
UV light contains UV-C (100 nm to 280 nm), UV-B (280 nm to 315 nm) and UV-A (315 nm to 400 nm). The atmosphere blocks natural UV-C and most UV-B rays, with UV-A accounting for 95% of rays reaching.
Remember that light includes a spectrum of light colors, from red to dark blue, which you can see if you break it up with a prism. In the graph below, the spectrum of sunlight is represented by the yellow colored area, from very blue (short wavelength) at the left, to very red (long wavelength) at the right.
But exposure to large amounts of blue light can be harmful to the eyes. Sources The plethora of electronic devices in use today, such as cell phones, tablets, and laptop computers, has drastically increased our exposure to blue light.