Which column corresponds to equal input from both eyes in a normally developed histogram?

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Multiple Choice

Which column corresponds to equal input from both eyes in a normally developed histogram?

Explanation:
The balance between inputs from the two eyes is shown by the central, or middle, column. In a normally developed binocular system, input from both eyes is equal, so the histogram should be symmetric around the center. With seven columns, the center is the fourth column, which represents equal input from both eyes. The columns to the left show greater input from one eye, and the columns to the right show greater input from the other eye. So the column for equal input is the middle one, column four.

The balance between inputs from the two eyes is shown by the central, or middle, column. In a normally developed binocular system, input from both eyes is equal, so the histogram should be symmetric around the center. With seven columns, the center is the fourth column, which represents equal input from both eyes. The columns to the left show greater input from one eye, and the columns to the right show greater input from the other eye. So the column for equal input is the middle one, column four.

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