{HEAD ~ The aspheric surface} of revolution is of {TAIL ~ a design} to reduce natural aberrations inherent in imaging using surface of revolutions of the conic family of curves 
{ HEAD ~ The aspheric surface } of revolution is of { TAIL ~ a design } to reduce natural aberrations inherent in imaging using surface of revolutions of the conic family of curves
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH