Binocular Clues

Retinal Disparity

By only using one eye the flower on the left looks farther away, but using two eyes the flowers look closer together.  This show's retinal disparity because in order to truly perceive the image and the depths of the two flowers you have to use both of your eyes instead of one.  

Convergence 

The man above has the phone close to his face therefore his eyes have to face inwards to see the phone properly.  Convergence is the neuromuscular cue that the eye must turn inward in order to see objects that are close and outwards to see objects far away.