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.
The headache can last from half an hour to a week. Doctors define occasional headaches of this type as episodic. Chronic headaches. About 4 in 100 people suffer from chronic headaches. A chronic headache is where someone has the headache on 15 or more days per month. These may be chronic tension-type headaches.