{HEAD ~ A fourth optical surface} 16120 may be disposed in communication with {TAIL ~ third support member} 16110 
{ HEAD ~ A fourth optical surface } 16120 may be disposed in communication with { TAIL ~ third support member } 16110
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH