Vision involves both the acquisition and processing of visual information. AI powered technologies have made possible such astounding achievements as vehicles that are able to safely steer themselves along our superhighways, and computers that can recognize and interpret facial expressions. Just consider the complexity of the analysis that your brain must engage in before determining that something as apparently simple as the fact that the black squares on a chess board are not holes, but rather part of the surface, and you'll have an idea of how sophisticated vision systems must be in order to reliably perform their objectives.