Intraocular pressure

Intraocular pressure
The pressure created by the continual renewal of fluids within the eye. The intraocular pressure is increased in glaucoma. In acute angle-closure glaucoma, the intraocular pressure rises because the canal into which the fluid in the front part of the eye normally drains is suddenly blocked. In chronic glaucoma, there is a gradual imbalance between the production and removal (resorption) of the fluid in the back part of the eye (with supply exceeding demand).

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intraocular pressure n the pressure within the eyeball that gives it a round firm shape and is caused by the aqueous humor and vitreous body called also intraocular tension

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the pressure of the fluids of the eye against the tunics. It is produced by continual renewal of the fluids within the interior of the eye, and is altered in certain pathological conditions (e.g., glaucoma). It may be roughly estimated by palpation of the eye or measured, directly or indirectly, with specially devised instruments called tonometers. Normal intraocular pressure is symbolized Tn. Called also intraocular tension.

Medical dictionary. 2011.

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  • intraocular pressure — pressure within the eye caused by fluid in the orbit …   English contemporary dictionary

  • IOP (intraocular pressure) — The pressure created by the continual renewal of fluids within the eye. The normal IOP varies among individuals. The intraocular pressure is increased in glaucoma. In acute angle closure glaucoma, the intraocular pressure rises because the canal… …   Medical dictionary

  • intraocular — [in΄trə äk′yo͞o lər] adj. located within, or surgically implanted into, an eyeball [intraocular pressure, intraocular lens] …   English World dictionary

  • Intraocular — In the eye. The intraocular pressure is the pressure within the eye. * * * Within the eyeball. * * * in·tra·oc·u·lar .in trə äk yə lər, (.)trä adj implanted in, occurring within, or administered by entering the eyeball <intraocular… …   Medical dictionary

  • Pressure, intraocular — The pressure created by the continual renewal of fluids within the eye. The intraocular pressure is increased in glaucoma. In acute angle closure glaucoma, the intraocular pressure rises because the canal into which the fluid in the front part of …   Medical dictionary

  • Intraocular tension — The pressure within the eye. See: Intraocular pressure. * * * see under pressure. Symbol T …   Medical dictionary

  • pressure level — noun the force applied to a unit area of surface; measured in pascals (SI unit) or in dynes (cgs unit) the compressed gas exerts an increased pressure • Syn: ↑pressure, ↑force per unit area • Derivationally related forms: ↑press ( …   Useful english dictionary

  • intraocular — adjective Etymology: International Scientific Vocabulary Date: 1872 implanted in, occurring in, or administered by entering the eyeball < intraocular pressure > • intraocularly adverb …   New Collegiate Dictionary

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