in medicine, a deprivation of sight, the eye remaining fair and seemingly unaffected. A perfect amaurosis is when the blindness is total; when there is still a power of distinguishing light from darkness, the disase is called by M. de St Ives an imperfect amaurosis. There is a periodical sort which comes on instantaneously, continues for hours, or days, and then disappears. Mr Hey, surgeon at Leeds, mentions several cases of patients afflicted with the amaurosis who were relieved by being electrified.