optic axis

optic axis

noun Crystallography.

  1. (in a crystal exhibiting double refraction) the direction or directions, uniaxial or biaxial, respectively, along which this phenomenon does not occur.


  1. the direction in a uniaxial crystal or one of the two directions in a biaxial crystal along which a ray of unpolarized light may pass without undergoing double refraction


  1. The line connecting the anterior and the posterior poles of the eye.
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