The present technology relates to detection apparatus and method by which the operability can be enhanced with a simple configuration. A contact lens type line-of-sight detection apparatus has a shape such that it is wearable on an eyeball of a user. Furthermore, in the line-of-sight detection apparatus, a plurality of light-emitting sections that output light and a plurality of light-receiving elements that receive light reflected by an eyeball surface. The light-receiving elements receive light that has been output from the light-emitting sections and reflected by the eyeball surface and output light-receiving signals according to amounts of light received. The signal processing unit detects a line of sight of the user based on the light-receiving signals of the light-receiving elements. The present technology can be applied to a contact lens type line-of-sight detection apparatus or a display apparatus.
