A patient diagnosed with glaucoma has what condition?

Glaucoma is primarily characterized by an abnormally high intraocular pressure (IOP). This condition occurs when the fluid in the eye, known as aqueous humor, does not drain properly. The buildup of fluid increases the pressure within the eye, which can lead to damage of the optic nerve and, if left untreated, can result in vision loss. Elevated intraocular pressure is a significant risk factor for glaucoma, and managing this pressure is crucial in the treatment and prevention of disease progression. Monitoring IOP is essential in diagnosing and managing glaucoma, making the presence of high intraocular pressure a defining feature of the condition.