Glaucoma is primarily a disease associated with:

Glaucoma is primarily associated with increased intraocular pressure. This condition occurs when the eye's drainage system becomes blocked or when the eye produces too much fluid. The heightened pressure can damage the optic nerve, leading to vision loss if not managed properly. It is crucial to understand that while there are different types of glaucoma, such as open-angle and angle-closure glaucoma, the common factor across these types is the presence of elevated intraocular pressure, which is a key risk factor in the disease's progression.

The other options deal with different ocular conditions: absence of the lens refers to congenital anomalies, inflammation of the eyelids relates to blepharitis or similar conditions, and blurred vision due to unequal curvatures refers to astigmatism. These conditions do not directly relate to the pathophysiological mechanisms of glaucoma, which centers on the changes in eye pressure and the resulting impact on optic nerve health.