Ocular hypertension (OHT) is a state of elevated pressure within the eye, called intraocular pressure or IOP, and is frequently a precursor to glaucoma and other optic neuropathies.
Within the eye, a fluid called aqueous humor helps the eye keep its shape and delivers nutrients to the front of the eye. Aqueous humor is constantly being produced by the ciliary body, flowing through the anterior chamber, and out primarily through the trabecular meshwork. IOP can become raised when too much fluid enters the eye, or when the trabecular meshwork becomes clogged, slowing the flow of aqueous humor out of the eye. As fluid accumulates in the eye, it puts pressure on the walls of the eye, including around the optic nerve. As the optic nerve is squeezed and becomes damaged, vision starts to deteriorate.