Binocular Cues

Question 1

Convergence

Answer 1

To focus, our eyesight lines from each eye converge, and when this convergence, we go cross-eyed. This tells brain whether objects are far or near.

Question 2

Retinal disparity

Answer 2

The way the left eye and right eye view slightly different images. Faraway objects seen as singular. As they move closer, it gives an illusion of “double vision”