How to Test for Binocular Vision

In order to view a 3-D movie properly, you must have binocular vision. Binocular vision occurs when both of your eyes work together, at the same time, each signaling to the brain what they are seeing. If you don't have binocular vision, 3-D movies will not "pop" for you. Instead, you will see just a regular movie or picture, despite the fact that you are wearing 3-D glasses. Testing for binocular vision is all that is required to avoid this problem.

Things You'll Need

• Marker
• Piece of paper
• Wall tack or tape

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Instructions

• 1

  Draw a circle approximately the size of a quarter on a piece of paper. Make sure that it is dark enough to be seen easily. Using yellow ink is not recommended. Instead, opt for black, blue, purple or red ink.

• 2

  Tack or tape the piece of paper onto the wall. Place the paper so that the circle that you drew is eye level to you.

• 3

  Step back approximately 2 feet from the wall. Focus on the dot on the paper for a few seconds.

• 4

  Lift a thumb or finger in front of your nose while you continue to focus on the dot on the wall. Position your thumb or finger so that it is approximately 1 or 2 inches in front of your nose, not directly on the tip of your nose. While focusing on the dot, a person with binocular vision will see two thumbs framing the dot on the wall--one thumb on the left, and one on the right.

• 5

  Change your focus now, so that you are focusing on your thumb. While focusing vision on the thumb, a person with binocular vision will see two dots framing the thumb--one dot on the left side and one on the right.