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# How much is our field of view:**(a) **with one eye open?**(b)** with both eyes open?

**(a)** Our field of view with one eye open is about 150º.

**(b)** Our field of view with both eyes open is 180º.

__Explanation__

Human beings have two eyes in front of their head, so it provides a horizontal field of view of about 150º with one eye open, and 180º with two eyes open.

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