 The aim of most forms of non-surgical treatments for IXT is to improve the strength andor quality of binocular single vision by either eliminating suppression, increasing awareness of diplopia, andor increasing positive fusional amplitudes. Commonly used non-surgical treatment methods include: occlusion, fusional vergence exercises sometimes known as vision therapy or orthoptics, and over-minus lenses. When surveyed in 1990, members of the American Association for Pediatric Ophthalmology and Strabismus reported that occlusion was the most commonly used form of non-surgical treatment. More recently 2008, a poll of our investigator group revealed again that occlusion was the most widely prescribed non-surgical treatment for children affected by IXT. 