Depth perception: "the ability to judge the distance of objects and the spatial relationship of objects at different distances" (merriam-webster.com).
Humans judge depth perception in two main ways: using monocular cues and using binocular cues. Monocular cues are those that only need one eye to work. Binocular cues, on the other hand, are cues that need both eyes to work. One such binocular cue is demonstrated above. As the woman brings her finger closer to her nose, her eyes begin to move inward toward the nose, eventually becoming completely cross-eyed. This demonstrates the binocular cue of convergence. Convergence states that as an object gets closer to our face, our eyes move toward each other to maintain focus on the object. The more our eyes are turned inward, the closer the object. In this case, the finger was very close to the face, causing the eyes to turn as far inward as they could to accommodate. The next post for Depth Cues is a more in-depth look into various Monocular Cues. Stay tuned!
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