scioptic

a. [ Gr. &unr_; shadow + &unr_; 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. [ 1913 Webster ]

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. [ 1913 Webster ]