Final answer:
Glaucoma is a condition where increased intraocular pressure due to blocked fluid circulation in the eye can cause pain and potential blindness.
Step-by-step explanation:
The condition characterized by increased pressure within the eye, causing pain and possibly blindness, is known as glaucoma. This buildup of intraocular pressure occurs when the circulation of fluid in the eye is blocked. The shape of the eye is maintained by this fluid pressure, which typically ranges from 12.0 to 24.0 mm Hg. However, in the case of glaucoma, pressure can escalate to abnormally high levels, potentially leading to permanent damage to the optic nerve. Alongside glaucoma, there are other pressures in the body, such as spinal and skull pressures, bladder pressure, and pressures within the skeletal system.