Difference in Portrait PSR Treatments and Settings?
I am thinking of having Portrait because I have a lot of sunspots on my face and wrinkles around my eyes. I have been reading about Portrait online, but am confused by the options of the settings of PSR1, 2, 3, and also have seen references to "joules". What is the difference between these settings, and how is the right setting determined? Do doctors use different settings for different areas?