<instrument> An instrument in the form of a dark chamber for observing the changes in the lens during accommodation. ... Origin: phaco-+ G. Skopeo, to view ... (05 Mar 2000) ... 
(fak´o-skōp) an instrument for viewing accommodative changes of the eye lens.
Type: Term Pronunciation: fak′ō-skōp Definitions: 1. An instrument comprising a dark chamber for observing the changes in the lens during accommodation.
phacoidoscope, phacoscope An instrument for viewing accommodative changes of the eye lens.phacoscope An instrument in the form of a dark chamber for observing the changes in the eye lens during accommodation (adjustment, especially that of the eye for various distances resulting in pupil constriction or dilatation).