US Patent 7270677 Polarization-sensitive vision prosthesis

A vision prosthesis includes a first detector disposed to detect a polarization state of light reflected from a retina, and a controller in communication with the first detector. The controller is configured to receive, from the detector, a measurement signal indicative of the polarization state. In response thereto, the controller generates a control signal for causing a change to an optical property of an optical system in optical communication with the retina.