Getting Under Your Skin
There is a device, which uses a confocal microscope and laser to “penetrate” your skin. Because of the different indexes of refraction in the components of your skin, the reflected light creates an image. The microscope can then focus on a layer below your uppermost layer of skin and present an image a few milimeters square.
As you delve deeper, various structures come into view. At the surface, which has lots of keratin, you see bright areas with fissures, cracks in your skin. At the next depth, the brightness fades, and the water in your individual cells rule. The image is one of a honeycomb type pattern where the dark areas are individual cells. Individual, living, human skin cells. At the very next layer, and the deepest the microscope can penetrate, about 180-200 micrometers, you see the connecting prongs between two layers of the epidermis, dermal papilla. And through these paplia pumps blood, which you see in its haunting and fragile beauty.
I mention this apparatus, because there is one exactly one flight of stairs below where I now sit and type. It is on display and in use on a human subject. I wouldn’t believe all that I said above, if I hadn’t seen all this with my own eyes. Fascinating stuff!

