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2. Intraocular pressure - Wikipedia

   en.wikipedia.org/wiki/Intraocular_pressure

   Intraocular pressure (IOP) is the fluid pressure inside the eye. Tonometry is the method eye care professionals use to determine this. IOP is an important aspect in the evaluation of patients at risk of glaucoma. [1] Most tonometers are calibrated to measure pressure in millimeters of mercury .

3. Ocular hypertension - Wikipedia

   en.wikipedia.org/wiki/Ocular_hypertension

   Ocular hypertension is the presence of elevated fluid pressure inside the eye (intraocular pressure), usually with no optic nerve damage or visual field loss. [1] [2]For most individuals, the normal range of intraocular pressure is between 10 mmHg and 21 mmHg. [3]

4. Ocular tonometry - Wikipedia

   en.wikipedia.org/wiki/Ocular_tonometry

   As the probe bounces against the cornea and back into the device, it creates an induction current from which the intraocular pressure is calculated. The device is simple and easy to use and self-use versions are available. It is portable, does not require the use of eye drops and is particularly suitable for children and non-cooperative ...

5. Glaucoma - Wikipedia

   en.wikipedia.org/wiki/Glaucoma

   For eye pressures, a value of 28 hPa (21 mmHg) above atmospheric pressure 1,010 hPa (760 mmHg) is often used, with higher pressures leading to a greater risk. [2] [26] However, some may have high eye pressure for years and never develop damage. [2] Conversely, optic nerve damage may occur with normal pressure, known as normal-tension glaucoma. [27]

6. 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 ...

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9. Acute visual loss - Wikipedia

   en.wikipedia.org/wiki/Acute_visual_loss

   A Snellen chart, which is frequently used for visual acuity testing Acute visual loss is a rapid loss of the ability to see . It is caused by many ocular conditions like retinal detachment , glaucoma , macular degeneration , and giant cell arteritis , etc.