When explaining primary open angle glaucoma to an older adult with the disease, which of the following would be a correct statement you could make to the patient regarding the disease?
A. "This disease advances rapidly because of a sudden increase in pressure in your eye."
B. "The disease is an emergency and you should immediately go to the emergency room."
C. "Increased pressure in your eye will slowly lead to a loss of vision if you don't maintain your treatment regimen."
D. "Poor blood flow into your optic nerve causes your vision to slowly decline."