Briefly discuss the prevalence of primary open angle glaucoma in the United States.

Question: Explain the prevalence of primary open angle glaucoma in the United States, including its definition, statistical data, risk factors, and the importance of early detection and treatment. Answer: Primary open angle glaucoma (POAG) is a chronic eye condition that leads to optic nerve damage and vision loss due to increased pressure within the eye. This condition affects over 3 million people in the United States, accounting for about 90% of all glaucoma cases. The prevalence rate of POAG in the U.S. is approximately 2.1% among adults aged 40 and older. Risk factors include age, family history, race, and medical conditions such as diabetes and high blood pressure. Early detection and treatment are crucial to slow down the progression of the disease and preserve vision.