Optic axis Meaning, Definition & Usage
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noun in a doubly refracting crystal, the line in the direction of which no double refraction occurs
- a crystal may have either one or two optic axes
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noun a line that passes through the center of curvature of a lens so that light is neither reflected nor refracted
principal axis.
- in a normal eye the optic axis is the direction in which objects are seen most distinctly
WordNet
Definitions
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(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.