Why do so many laser/IPL hair removal treatments fail?

Laser/IPL hair removal has been around since the dinosaurs…. Yet, it is still poorly understood and even more poorly delivered! We have read all sorts of nonsense about this topic on the internet. There appears to be a lot of ‘mythconceptions’ out there, which just keep doing the rounds. So, let’s drill down on this.… Continue reading Why do so many laser/IPL hair removal treatments fail?

Back-scattered light from the skin is much more than we think…

My Letter describing back-scattered laser radiation from the skin has been published in the ‘open market’ by Springer! I’m very pleased that they have done this. However, I am now thinking that the levels of back-scattered light are higher than I first thought. The is coming from new work I have been doing looking at… Continue reading Back-scattered light from the skin is much more than we think…

What is it like to ‘sit’ on a photon and be fired into the skin?

Let’s take a ride on a photon. Imagine we can sit on a photon. What would a trip into the skin be like? Well, it might be something like this…. As we leave the laser we will be travelling at nearly the speed of light – that is 30 million kilometres per second! However, as… Continue reading What is it like to ‘sit’ on a photon and be fired into the skin?

Laser-IPL Penetration Depth – a more useful definition

The ‘standard’ definition of penetration depth in skin only considers the incident wavelength and optical properties of the skin. While this may be useful from a physics perspective, it is not particularly useful when considering clinical treatments. A more useful definition must include wavelength, anisotropy, spot diameter and incident fluence. All of these have an… Continue reading Laser-IPL Penetration Depth – a more useful definition

Tattoo removed in just 4 sessions using a QS Nd:YAG at 1064nm

The following is an experiment I carried out to test a theory. A number of experiences had made me think that the time between laser sessions is more important than first thought. My clinical group first developed scar-free laser tattoo removal back in the 1980s in Canniesburn Hospital, Glasgow, Scotland. Back then, we were using… Continue reading Tattoo removed in just 4 sessions using a QS Nd:YAG at 1064nm

Laser spot size – how it changes with distance from the target…

Most laser systems have a lens to focus the laser energy down to a sale spot diameter (see figure 1 below). However, in many systems, the focal point (where the spot diameter is the smallest) is outside the handpiece assembly. This has a potentially hazardous effect if not properly understood! The problem with this design… Continue reading Laser spot size – how it changes with distance from the target…

Carbon Facial treatment with a QS Nd:YAG laser

Recently I tried the new ‘carbon facial’ treatment using the 1064nm wavelength of the Q-switched Nd:YAG laser. My wife was keen to try it! I painted a little black carbon ink solution (which I made myself) onto my wife’s face. After about 20 minutes, or so, to allow it to dry, I applied the laser… Continue reading Carbon Facial treatment with a QS Nd:YAG laser