Strabismus is used to describe the disorder where the eyes do not line up together in the same direction. Six different muscles surround the eyes and work together to ensure both eyes can focus on the same object. In someone with strabismus, these muscles do not work together. As a result, one eye looks at one object, while the other eye turns in a different direction and is focused on another object. The squinting eye can turn inwards (convergent), outwards (divergent), up or down. When squinting occurs, two different images are sent to the brain, one from each eye. This confuses the brain, and the brain may learn to ignore the image from the weaker eye. Someone with strabismus may also experience difficulty with depth perception.