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Videofluoroscopic swallow study:  A test performed by a speech and language pathologist for someone who has trouble swallowing.  An X-ray is taken of the swallowing process while different textures of food and drink are trialed to determine if the person can safely eat and drink.

Visual fields:  Entire area one sees while looking forward, including what is seen in the periphery or sides.

Visual field defect:  A loss of part of the usual field of vision that does not include blindness of one eye or both.  This can be caused by a stroke affecting the part of the brain that controls vision.  Homonymous hemianopsia, or homonymous hemianopia, is a type of visual field defect that describes the loss of vision on the same side of both eyes.