Month: October 2024

Fitzpatrick Type – what does this really mean and how does it affect our laser/IPL skin treatments?

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Here we go again! Fitzpatrick – the most mis-understood concept in laser/IPL therapies. Everyone who does laser/IPL treatments on the skin talks about the “Fitzpatrick”. Yet most people don’t really know what it means! Here is my take: There are two things you MUST understand: Dr Fitzpatrick was an American dermatologist who devised a scale… Continue reading Fitzpatrick Type – what does this really mean and how does it affect our laser/IPL skin treatments?

Human retinal sensitivity to wavelengths

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Most people can see a wide range of coloured light, from around 350 up to 750nm. But, our sensitivity is not the same for all colours.  Our human retina sees different colours differently. The graph below shows how this is – we see violet very poorly. Likewise with the ‘deep’ reds, out at 700+ nm.… Continue reading Human retinal sensitivity to wavelengths