Op art.

(telecommunications) A switch that can selectively change signals between optical fibers or integrated optical circuits.

(astronomy) A star that appears as a double due to an optical illusion; in reality, the stars may be far apart from each other.

That does not involve vision / That does not use optics

(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.

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.

(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

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