a abstract line which passes by way of the core of an optical system. In the circumstance of the eye, it passes by way of both the lens and the cornea.

OPTICAL AXIS: "The optical axis is hypothetical and does not actually exist in physical form."
Cite this page: N., Pam M.S., "OPTICAL AXIS," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/optical-axis/ (accessed October 18, 2021).