optically

From optical + -ly.

• Audio (US):

  (file)

optically (not comparable)

1. regarding or using optics
   • 1984 May 6, Hans Fantel, “These Cameras Have Shrunk but Their Capabilities Have Grown”, in The New York Times‎^[1], New York, N.Y.: The New York Times Company, →ISSN, →OCLC, archived from the original on 24 May 2015:

     The picture is seen optically through the lens, as in many photo cameras.

   • 2015, Istvan Hargittai, Balazs Hargittai, Science of Crystal Structures: Highlights in Crystallography, →ISBN, page 183:

     The microscopically small crystals often obtained by very rapid cooling of the hot solution, appeared to be no crystals of the optically active form either; they were rhombic individuals exhibiting prismatic, domatic and basal facets, of a new hydrate of the racemic compound, probably at higher temperatures stable, and containing less water of crystallization.

• allotypic, topically