adj 1 a  :  of or relating to vision < phenomena>   b  :  dependent chiefly on vision for orientation <humans are basically animals>   2 a  :  of or relating to the eye  :  OCULAR  b  :  affecting the eye or an optic structure
n 1  :  any of the elements (as lenses, mirrors, or light guides) of an optical instrument or system - usu. used in pl.  2  :  an optical instrument .
 
 
 
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