English noun: optic axis | |||
1. | optic axis (cognition) in a doubly refracting crystal, the line in the direction of which no double refraction occurs | ||
Samples | A crystal may have either one or two optic axes. | ||
Broader (hypernym) | axis | ||
2. | optic axis (cognition) a line that passes through the center of curvature of a lens so that light is neither reflected nor refracted | ||
Samples | In a normal eye the optic axis is the direction in which objects are seen most distinctly. | ||
Synonyms | principal axis | ||
Broader (hypernym) | axis | ||