Noun

(-)

(label) The physics of light and vision.

The light-related aspects of a device.

*{{quote-magazine, year=2013, month=September-October, author=(Henry Petroski)

, magazine=(American Scientist), title= The Evolution of Eyeglasses , passage=Digging deeper, the invention of eyeglasses is an elaboration of the more fundamental development of optics technology. The ability of a segment of a glass sphere to magnify whatever is placed before it was known around the year 1000, when the spherical segment was called a reading stone,

(label) Perception, image, public relations.

* 2007 January 1, (Mark Steyn), " Blowing a 'hinge moment' of history", in (The Jerusalem Post) :

; if you have to have victims' loved ones present, go for the widows and photogenic orphans rather than Moqtada's boys.

English plurals