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opticmore about optic

optic

 

  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Optic  \Op"tic\,  n.  [From  {Optic},  a.] 
  1.  The  organ  of  sight;  an  eye. 
 
  The  difference  is  as  great  between  The  optics 
  seeing,  as  the  object  seen.  --Pope. 
 
  2.  An  eyeglass.  [Obs.]  --Herbert. 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Optic  \Op"tic\,  Optical  \Op"tic*al\,  a.  [F.  optique  Gr  ?;  akin 
  to  ?  sight,  ?  I  have  seen,  ?  I  shall  see  and  to  ?  the  two 
  eyes,  ?  face,  L.  oculus  eye.  See  {Ocular},  {Eye},  and  cf 
  {Canopy},  {Ophthalmia}.] 
  1.  Of  or  pertaining  to  vision  or  sight. 
 
  The  moon,  whose  orb  Through  optic  glass  the  Tuscan 
  artist  views.  --Milton. 
 
  2.  Of  or  pertaining  to  the  eye;  ocular;  as  the  optic  nerves 
  (the  first  pair  of  cranial  nerves)  which  are  distributed 
  to  the  retina.  See  Illust.  of  {Brain},  and  {Eye}. 
 
  3.  Relating  to  the  science  of  optics;  as  optical  works 
 
  {Optic  angle}  (Opt.),  the  angle  included  between  the  optic 
  axes  of  the  two  eyes  when  directed  to  the  same  point;  -- 
  sometimes  called  {binocular  parallax}. 
 
  {Optic  axis}.  (Opt.) 
  a  A  line  drawn  through  the  center  of  the  eye 
  perpendicular  to  its  anterior  and  posterior  surfaces. 
  In  a  normal  eye  it  is  in  the  direction  of  the  optic 
  axis  that  objects  are  most  distinctly  seen. 
  b  The  line  in  a  doubly  refracting  crystal,  in  the 
  direction  of  which  no  double  refraction  occurs.  A 
  uniaxial  crystal  has  one  such  line  a  biaxial  crystal 
  has  two 
 
  {Optical  circle}  (Opt.),  a  graduated  circle  used  for  the 
  measurement  of  angles  in  optical  experiments. 
 
  {Optical  square},  a  surveyor's  instrument  with  reflectors  for 
  laying  off  right  angles. 
 
  From  WordNet  r  1.6  [wn]: 
 
  optic 
  adj  1:  of  or  relating  to  or  resembling  the  eye;  "ocular  muscles"; 
  "an  ocular  organ";  "ocular  diseases";  "the  optic  (or 
  optical)  axis  of  the  eye";  "an  ocular  spot  is  a 
  pigmented  organ  or  part  believed  to  be  sensitive  to 
  light"  [syn:  {ocular},  {optical},  {opthalmic}] 
  2:  relating  to  or  using  sight;  "ocular  inspection";  "an  optical 
  illusion";  "visual  powers";  "visual  navigation"  [syn:  {ocular}, 
  {optical},  {visual}] 
  n  :  the  organ  of  sight  (`peeper'  is  an  informal  term  for  `eye') 
  [syn:  {eye},  {oculus},  {peeper}]




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