Final answer:
Glaucoma is the condition where increased intraocular pressure in the eye leads to worsening sight. It occurs when fluid circulation in the eye is blocked.
Step-by-step explanation:
The condition of the eye in which the internal pressure increases, resulting in worsening sight, is called glaucoma. This condition is caused by a blockage that affects the circulation of fluid within the eye, leading to an increase in intraocular pressure. While other body parts also experience pressure, such as in the spinal and skull regions, when specifically referring to the increased pressure within the eye leading to potential vision loss, it is identified as glaucoma.