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Binocular vision is the ability to perceive a single, three-dimensional image using both eyes. This is achieved when the brain fuses the slightly different images from each eye. This process allows for depth perception and improved visual acuity.12

When the eyes are not properly aligned, binocular vision can result in double vision, where two images of a single object are perceived. This misalignment, known as binocular diplopia, can be caused by issues with the eye muscles or the nerves that control them, and can stem from various medical conditions or trauma.3

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