When we’re taught above lightin the sin, we’re usually told that its intensity drops (exponentially!) with depth. So, as a result, deeper targets are more difficult to heat than superifical ones. That makes sense – kind of… But this is not a true representation of what is realy going on. There are a few things… Continue reading How does light energy progress through the skin?
“The Aesthetics Blind Spot” – my talk to the Laser Safety Forum
I recently gave a talk (Sept 26) to the Laser Safety Forum in Loughborough. This is a meeting of all sorts of people involved with laser safety in industry, scientific research, medicine and various other sectors. I had been invited to give a talk about the state of play of laser safety in the UK… Continue reading “The Aesthetics Blind Spot” – my talk to the Laser Safety Forum
What exactly is a “medical grade” device?
(In the UK!!) I often see comments online from laser suppliers and users discussing “medical grade” lasers but what exactly does that mean? Well, the first thing that we should understand is that a medical grade laser is not a defined legal or regulatory designation in the UK. It is essentially a marketing term! The… Continue reading What exactly is a “medical grade” device?
Hair growth cycle – new information…
I have been invesitgating the removal of hair by laser and IPL for about 427 years. But recently, I figured out something quite important in the growth cycle. Histological research shows that the matrix cells, which envelope the dermal papilla cells at the base of the follilce, grow in both size and melanin concnetration as… Continue reading Hair growth cycle – new information…
The reasoning behind my ‘Fluence App’ for hair removal
Understanding Your Fluence Recommendations A guide to what the ‘Fluence Range Recommender’ App is doing, and why In short… The app is built on real physics and biology, not guesswork – based on three of my computer models which I have worked on over the last 20+ years. It works out how much light energy… Continue reading The reasoning behind my ‘Fluence App’ for hair removal
New ‘fluence recommender’ App
After many, many years of building computer models trying to understand how light energy interacts with various tissues, I have now built a wee app which does it all for you!! But, only for laser/IPL hair removal (so far!) This app allows the user to select a device, its maxmimum fluence and pulsewidth and its… Continue reading New ‘fluence recommender’ App
My “Bookcase” – all my online books, for free
I have put all my digital books online here – https://book.flipbuilder.com/mikemurphylpa/. These include my three ‘big’ books on the fundamentals of lasers and IPLs and the removal of hair and tattoos. I have also added my wee Canva booklets which are packed full of information, including two new ones: “Reading the Skin” which looks at… Continue reading My “Bookcase” – all my online books, for free
This made me laugh out loud…
I recently came across a very funny story regarding a student who had submitted some work, and his teacher’s response. It made me laugh.. Ciao for now, Mike.
Which IPL filter should we choose?
I often see IPL devices with lots of IPL filters, sometimes 8 or 9 of them. I look at them and wonder – “what do all these do?” So I’ve drawn up a list of typical filters and when they should be used: These are all based on targeting particular chromophores in the skin: In… Continue reading Which IPL filter should we choose?
What is the ‘best’ time interval between laser/IPL hair removal sessions?
I am asked this question all the time!! It’s tricky to answer because it’s not at all obvious. The short answer is: the interval should track telogen duration, not anagen duration. Anagen tells you what you can kill today; telogen tells you how fast the next treatable cohort arrives. See what I mean?!?! The Merhag… Continue reading What is the ‘best’ time interval between laser/IPL hair removal sessions?
