What is "scioptic"

Scioptic \Sci*op"tic\, a. [Gr. ? shadow + ? belonging to sight: cf. F. scioptique. See Optic.] (Opt.) Of or pertaining to an optical arrangement for forming images in a darkened room, usually called scioptic ball.

Scioptic ball (Opt.), the lens of a camera obscura mounted in a wooden ball which fits a socket in a window shutter so as to be readily turned, like the eye, to different parts of the landscape.

a. (context dated English) Of or relating to an optical arrangement for forming images in a darkened room.