(archaic, humorous) An eye. / (optics) A lens or other part of an optical instrument that interacts with light.

(physics) A device that employs a focused laser beam to trap, manipulate and image very small particles

Optical discs used to store data, including such formats as Laserdisc, compact disc, DVD, and Blu-ray.

That does not involve vision / That does not use optics

A modern data storage medium consisting of a flat disc read mechanically by illumination with laser light. Formats include the Laserdisc, compact disc, DVD, and Blu-ray.

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

(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

A class of glass used to create optical lenses, such as that for spectacles or spyglasses

(computing) A mouse (pointing device) that uses a light source and a light detector (for example, an LED and an array of photodiodes) to detect movement, as opposed to the earlier mechanical mouse.