HOW OFTEN SHOULD A PERSON BE EXAMINED TO DETECT GLAUCOMA

        Older than age 60:
        Once a year
        Some between the age of 40 and 60 years
        Other risk factors present (e.g.,diabetes, high blood
              pressure, family history):
        Once each year after age 40.
         African-American between age 30 and 40:
        Once every two years.