Optics

[Sarah]

That branch of physical science which treats of the nature andproperties of light, the laws of its modification by opaque andtransparent bodies, and the phenomena of vision.

[Sarah]

What something will look like to the outside world; the perception a public relations person would have on something. First seen (at least by me) in article by Equity Private on finance blog dealbreaker

[Dave Paprocki]

The viewing lens of public perception. How the media will play a story. Political repercussions are all about optics. Bad optics would be giving the media or the political opposition a juicy story to play with.

[Greta]

The appearance and public [perception] of a certain situation or action, as was most recently used by the [synagogue] shooter in [Pittsburgh] on his social media post just before the horrible attack.

[Raeanne Dimick]

The scientific study of sight and the behaviour of light, or the properties of transmission and deflection of other forms of radiation.