Learning Objectives

1.) Contrast allocentric and egocentric direction and explain when each is most useful as a frame of reference in depth perception.

2.) Distinguish between absolute and relative distance, and discuss why making this distinction is important when referring to depth perception.

3.) Specify the oculomotor cues to depth perception (convergence and accommodation) and explain how each one aids in 3-D perception.

4.) Describe the process of binocular vision (stereopsis).

5.) Discuss retinal disparity and state its relationship to stereopsis. Include in your answer an explanation of the horoptor.

6.) Describe the neurobiological hardware involved in stereoscopic vision including the function of disparity-selective cells.

7.) Discuss the various conditions resulting from retinal disparity malfunction including a description of each disorder and possible causes.

8.) Explain what is meant by monocular depth cues.

9.) Specify and explain in detail each of the static cues for monocular depth perception.

10.) Explain the moon illusion and discuss the possible reasons why this visual phenomenon results in distortions of perceived distance and size.

11.) Explain motion parallax and how it provides cues for depth perception.

12.) Discuss how both motion parallax and stereopsis can generate the same depth cue information despite the fact that they are distinctly different processes.

13.) Discuss the depth theory as an explanation for the occurrence of errors in perceived size using well known size illusions as examples.