Macrognathism is an abnormally large or protruding jaw. The opposite condition is called micrognathia. Causes
Heredity
Pituitary gigantism
Pagets disease of bone
Acromegaly
Fetal alcohol syndrome
Leontiasis ossea
Cleidocranial dysplasia

Treatment
Treatment is surgical. Osteotomy may be done in case of maxillary macrognathia. Mandibular macrognathia is generally managed by resection of a portion of the mandible. == References ==
With that new knowledge,  a new study of patient GY, who had  been used extensively to demonstrate the phenomenon of Blindsight (that is to say the ability to discriminate correctly visual stimuli presented to the blind field without conscious awareness) led to interesting findings. The re-examination showed that, when presented with fast-moving, high contrast, visual stimuli in his blind field, he could discriminate their presence and direction of motion consciously, This, in turn, led to a re-classification of blindsight into Type 1 and Type 2 the former adhering to the previous definition of blindsight while the latter acknowledging the fact that the experience of such subjects can be conscious even if much degraded. Only moving objects in the scotoma are visible, static ones being invisible to the patient. The moving objects are not perceived to have color or detail. The subject may only have awareness of the movement without visual perception of it (gnosanopsia), or the general shape of a moving object may be perceivable as a shadow like outline. The syndrome is named after George Riddoch who had been a temporary officer in the Royal Army Medical Corps and examined soldiers who were blinded by gunshot wounds to their brains.At least one patient was able to use a rocking chair—putting non-moving surroundings in relative motion to her head—to improve her motion perception. She eventually was able to do the same with movement of her head. See also
Blindsight – Visual response in some blind people
Visual agnosia


== References ==