optic axis, n.
(optic axes)
(optic axes)
a line that passes through the center of curvature of a lens so that light is neither reflected nor refracted
<noun.cognition>
optic axis principal axis
sample sentences
"in a normal eye the optic axis is the direction in which objects are seen most distinctly"
semantic pointers
hypernym
in a doubly refracting crystal, the line in the direction of which no double refraction occurs
<noun.cognition>
optic axis