federal definition [10] of blindness in the Supplemental Security Incomeprogram under. Title XVI of the Social Security Act currently states: (2) An individual shall be considered to be blind for purposes of this title if he has central. visual acuity of 20/200 or less in the better eye with the use of a correcting lens. An eye.
Headache (Definition) The medical term is cephalalgia. It is a feeling of pain that can occur on either both sides or just one side of the head or neck. Headaches can be sharp, dull, or throbbing, and can radiate to different areas of the head. They typically last less than an hour but can last for several days.
migraine. n. 1. (Pathology) a throbbing headache usually affecting only one side of the head and commonly accompanied by nausea and visual disturbances. [C18: (earlier form, C14 mygrame megrim 1): from French, from Late Latin hÄmicrÄnia pain in half of the head, from Greek hÄmikrania, from hemi- + kranion cranium].