Eye teaming or binocular vision is a visual skill that allows both of our eyes to point at the same target in space in a precise and coordinated manner. Under normal conditions, the eyes move together as a pair. This allows for clear, single and comfortable vision for a sustained period of time. Individuals suffering from eye teaming problems have their eye or eyes turning in, out, up or down (strabismus). This can result in a confusing and uncomfortable view as objects may appear double or blurry despite 20/20 vision. Signs of poor eye teaming skills include: covering or closing one eye while reading in an effort to stop seeing double, inaccurate judgement of depth which can affect sports performance, a decline in performance over prolonged period of time while doing near work, a short attention span, eyestrain or headaches when watching 3D movies.