| http://www.w3.org/ns/prov#value | - If you have symptoms or a risk factor, such as high blood pressure, diabetes or a family history of eye disease, consult your ophthalmologist or optometrist for how often you should be examined.Over 65 years oldEvery one to two yearsAfrican-Americans are at eight to nine times greater risk for glaucoma than whites.People with diabetes are at risk for several eye disorders, including diabetic retin
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