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obesity

a condition in which a greater than normal amount of fat is in the body; more severe than overweight; having a body mass index of 30 or more.

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ophthalmologist

a medical doctor who diagnoses and treats all eye diseases and eye disorders. Opthalmologists can also prescribe glasses and contact lenses.

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optician

a health care professional who dispenses glasses and lenses. An optician also makes and fits contact lenses.

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optometrist

a primary eye care provider who prescribes glasses and contact lenses. Optometrists can diagnose and treat certain eye conditions and diseases.

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oral glucose tolerance test (OGTT)

a test to diagnose pre-diabetes and diabetes. The oral glucose tolerance test is given by a health care professional after an overnight fast. A blood sample is taken, then the patient drinks a high-glucose beverage. Blood samples are taken at intervals for…

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oral hypoglycemic agents

medicines taken by mouth by people with Type 2 diabetes to keep blood glucose levels as close to normal as possible. Classes of oral hypoglycemic agents are alpha-glucosidase inhibitors, biguanides, D-phenylalanine derivatives, meglitinides, sulfonylureas, and thiazolidinediones.

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