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  2. Intraocular pressure - Wikipedia

    en.wikipedia.org/wiki/Intraocular_pressure

    Intraocular pressure laws follow fundamentally from physics. Any kinds of intraocular surgery should be done by considering the intraocular pressure fluctuation. Sudden increase of intraocular pressure can lead to intraocular micro barotrauma and cause ischemic effects and mechanical stress to retinal nerve fiber layer. Sudden intraocular ...

  3. Ocular hypertension - Wikipedia

    en.wikipedia.org/wiki/Ocular_hypertension

    It is estimated that approximately 2-3% of people aged 52-89 years old have ocular hypertension of 25 mmHg and higher, and 3.5% of people 49 years and older have ocular hypertension of 21 mmHg and higher. [4] [5] Elevated intraocular pressure is an important risk factor and symptom of glaucoma. Accordingly, most individuals with consistently ...

  4. Ocular hypotony - Wikipedia

    en.wikipedia.org/wiki/Ocular_hypotony

    Ocular hypotony is divided into statistical and clinical types. If intraocular pressure is low (less than 6.5 mm Hg) it is called statistical hypotony, and if the reduced IOP causes a decrease in vision, it is called clinical. [4]

  5. Eye examination - Wikipedia

    en.wikipedia.org/wiki/Eye_examination

    Intraocular pressure (IOP) can be measured by tonometry devices. The eye can be thought of as an enclosed compartment through which there is a constant circulation of fluid that maintains its shape and internal pressure. Tonometry is a method of measuring this pressure using various instruments. The normal range is 10-21 mmHg.

  6. Globe rupture - Wikipedia

    en.wikipedia.org/wiki/Globe_rupture

    Intraocular air [4] Magnetic resonance imaging (MRI) is avoided during the initial evaluation, particularly if metallic foreign bodies are suspected. [1] Ultrasound can detect intraocular foreign bodies and evaluate posterior chamber structures. However, direct pressure on the globe during an ultrasound can worsen the injury. [3]

  7. Ocular tonometry - Wikipedia

    en.wikipedia.org/wiki/Ocular_tonometry

    When the sensor is subjected to a change in pressure, the electrical resistance is altered and the tonometer's computer calculates a change in pressure according to the change in resistance. A complete measurement cycle requires about eight seconds of contact time. The device also measures the variation in pressure that occurs with the cardiac ...

  8. Normal tension glaucoma - Wikipedia

    en.wikipedia.org/wiki/Normal_tension_glaucoma

    Over many years, glaucoma has been defined by an intraocular pressure of more than 20 mm Hg. Incompatible with this (now obsolete) definition of glaucoma was the ever larger number of cases that have been reported in medical literature in the 1980s and 1990s who had the typical signs of glaucomatous damage, like optic nerve head excavation and thinning of the retinal nerve fiber layer, while ...

  9. Phacomorphic glaucoma - Wikipedia

    en.wikipedia.org/wiki/Phacomorphic_glaucoma

    Phacomorphic glaucoma is an eye disease that can occur due to a neglected advanced cataract.In this, the mature cataractous lens cause secondary angle closure glaucoma.The presence of an asymmetric mature cataractous lens, shallow or closed anterior chamber angle, raised intraocular pressure (IOP) and other typical signs and symptoms of angle-closure glaucoma in the eye may lead to a diagnosis ...

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