Squint refers to a disturbance of normal cooperation between the eyes, where one eye looks directly at the object being observed while the other, squinting, eye looks inwards, outwards, upwards, or downwards. Squinting may have various causes and in many cases no single cause can be identified. The treatment of squinting aims at good central visual acuity in both eyes, as well as good fusion and stereopsis. However, as these are not always possible, the aim may be good visual acuity, trouble-free vision and improved appearance. The treatment may include prescribing ordinary and/or prismatic spectacles, eye patching or squint surgery.