19. The fact that when we look at an object, each one of our two eyes receives a slightly different image of the object is known as A. binocular disparity C. convergence B. stereophonic vision D. binocular inversion

The correct answer is A. binocular disparity.<br /><br />Binocular disparity refers to the slight difference in the images received by each of our two eyes when we look at an object. This difference is due to the fact that our eyes are positioned slightly apart, and as a result, they receive slightly different viewpoints of the same object. This binocular disparity provides important information about depth and distance, which is crucial for our ability to perceive the three-dimensional world around us.