Ophthalmologists spend much of their time helping patients maintain (or regain) excellent visual acuity. But good binocular vision requires more than just two eyes that see well; the input to both eyes must be successfully combined by our eyes and brain to create our experience of a three-dimensional environment. Sometimes the muscles controlling the eyes have difficulty accomplishing that, leading to double vision. Other times, even when we’re successfully experiencing binocular vision, we pay a price for doing so because maintaining it requires an extraordinary amount of effort. In this feature from Review of Ophthalmology, doctors profile two new systems that can help to diagnose and manage problems tied to maintaining binocular vision. Read More.