Skiascopy

Examination of the cornea with a keratoscope. A frame with a series of plus andminus spherical lenses, to be used in place of test frame and lens

Source: Ophthalmic Dictionary including pronunciation, derivation and definition of the words used in Optometry and Ophthalmology by James J. Lewis, Oph. D. Professor of Optometry in the Northern Illinois College of Ophthalmology and Otology, Chicago.