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.
Chronic tension-type headache is a condition where you have a tension-type headache on at least 15 days every month for at least three months. Tension-type headaches are usually felt as a band or across the forehead. They can be uncomfortable and tiring, but they do not usually disturb sleep.