Strabismus is a deviation of line of sight of the two eyes, which implies that they are not located in the same direction with respect to the visual axis are not parallel. Thus, while one eye looks towards a particular object, the other goes in another direction. This is a visual and aesthetic problem. Being a deviation occurs at an early age is crucial that action be taken as quickly as possible, to avoid resulting in other ailments. To treat this disorder there are multiple techniques like alternating shutter each eye patch, use of special glasses, toxin injection to temporarily paralyze muscles or surgery. This is recommended only in extreme cases and is to avoid eye strain by strengthening or weakening, as appropriate, of certain eye muscles.