Depth Perception: The perception of distance allowing us to experience the world in three dimensions.
Binocular Cues: Depth cues requiring the use of two eyes.
Retinal Disparity: A depth cue based on the difference between the retinal images received by each eye.
the two images are combined to create a single image.
Convergence: A depth cue resulting from rotating the eyes inward to see something close. The rotating of the eyes causes feelings of tension in the eye muscle, This strain is stronger when objects are closer.