{HEAD ~ The window} may be transparent to therapeutic wavelengths transmitted to and through the window and to {TAIL ~ the skin} below 
{ HEAD ~ The window } may be transparent to therapeutic wavelengths transmitted to and through the window and to { TAIL ~ the skin } below
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH