(informal) Astronomy using observations using telescopes and recording media that capture visible light. / (astronomy) Astronomy using infrared, visible, and/or ultraviolet wavelengths.

plural of optical isomer

(neuroanatomy, anatomy) The part of the brain where the optic nerves partially cross.

(physics) The rotation of the plane of polarization of plane polarized light as it passes through a chiral medium

plural of optic nerve

plural of optical

(India) spectacles

Alternative form of suboptimal

plural of optical fiber

plural of optical disc