I’ve had a few queries about the use of laser lights. I can understand the allure of a laser, as its coherent light with such total focus is pretty impressive.
LED lights used to be very expensive. In the last decade the costs of LEDs have really dropped, and we can now buy them easily and inexpensively. LED lights are not coherent like lasers – the light from the average LED lights scatters and shines over a bigger area.
Question: For lights on the head, are lasers better than LEDs?
Both have their place, but the previous dominance of laser lights is being whittled away by practicality and safety of LED lights.
For trans-cranial use, you want the red lights to scatter – you want coverage of the lights over the head. You also want to use the lights daily, safely and at home.
Lasers are a pain to use, they come with safety issues and they are not suitable for home use.
LEDs are the best.
One of the problems of writing a blog, I’m finding, is that people are keen to share good news, but they are not so keen to share not so good news, or even no news. I’m guessing that there are people out there who can relate to this.
Let’s say that you have Parkinson’s, you have made yourself a light hat, and you have been wearing it every day for 20-30 minutes. You have a lot of hope.
A month down the track and nothing seems to have changed. You are feeling a bit fed up with the red light caper, and sick of the jokes that others make about it.
Another month goes past and you are sure that you’ve had no response from the lights. Are the red lights a load of hooey? Continue reading “The light hat isn’t helping my PD…”
Explains LLLT, Photobiomodulation and PBM.
You will have come across the various names for the use of red and near infrared lights. Michael Hamblin, one of the lead researchers in the area, has summarised the terminology changes beautifully in a recent article called (somewhat dauntingly) Mechanisms and Mitochondrial Redox Signalling in Photobiomodulation. Click here to read the full article.
Low Level Laser Therapy (LLLT)
Almost 50 years ago in Hungary, Endre Mester found by accident, that a low power red laser noticeably improved wound healing.
It was initially thought that light delivered by a laser was the key factor in the wound healing, and so the term Low Level Laser Therapy, abbreviated to LLLT, was developed.
If you put “LLLT” in your favourite search engine, you’ll find a lot of references will pop up.
Continue reading “Red light definitions”
Sunlight has a range of wavelengths, and these have been classified into four main groups: ultraviolet, visible, near infrared and far infrared. We can see the light in the visible spectrum (red, orange, yellow, green, blue indigo, violet) but we can’t see ultraviolet light and neither can we see infrared light.
Much research has been done on the effect of the sun’s ultraviolet light. It can cause premature ageing and increases the risk of skin cancers, hence the warnings to wear sunscreen to block those wavelengths from hitting the skin.
Until recent years, the effect of red and near infrared light, had been of less interest to medical science. It is now an area of increasing research, and the implications seem to be huge.
Continue reading “Red and near infrared light”