Patent ID: 8944600
Filing Date: 2015-02-03
Classification: A61B,G06K

Abstract:
1. An eye tracker comprising: at least one reference illuminator for illuminating an eye; a plurality of cameras for imaging the eye, with at least one camera being arranged relative to said at least one reference illuminator such that said at least one camera is able to image a retinal retro-reflection of said at least one reference illuminator, and with at least one other camera being arranged relative to said at least one reference illuminator such that a retinal retro-reflection of said at least one reference illuminator is not visible to said at least one other camera; and a controller configured to repeatedly evaluate an image quality metric based on at least one image quality factor for images provided by said at least one camera and said at least one other camera, and to select at least one of said at least one camera and said at least one other camera to be active based on the image quality metric.