A very interesting email arrived today, querying the effect of red LED lights on eyes.
It is all about the wavelength, not the type of light.
Red and near infrared wavelengths are not harmful to the eyes.
In fact, red wavelengths (especially 670nm, a deep red colour) are showing promise as a treatment for Age-related Macular Degeneration, a devastating progressive eye condition.
The lead researcher is Prof Glen Jeffery, professor of neuroscience at University College London.
Here’s a list of Prof Jeffrey’s publications.
And here’s a link to one of his articles.
If you are planning to make your own light hat device, make sure that you purchase red LEDs. There are LED strips available with lots of colours – avoid these as a rainbow isn’t helpful.
You just want red or near infrared wavelengths.
Be safe. Make only 12 volt light devices.
Just in case you have an urge to build an Eliza using 240 volts, then DON’T.
Light hats made with 12 Volt Direct Current work well. They are safe to make and use at home.
12 Volts DC is a safe way for us all to make and use light devices at home.
Remember the Goldilocks Effect. More power is not going to help, and if you start playing with 240 volts you are entering dangerous territory.
- Make 12 volt DC light devices
- Use it daily
- Email me through the blog and tell me how you are going
- Try using higher voltages
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”