Glaucoma FAQs Glossary of Terms

The following are health and medical definitions of terms that appear in the Glaucoma FAQs article.

Acute: Of abrupt onset, in reference to a disease. Acute often also connotes an illness th...

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Acute angle-closure glaucoma: Increased pressure in the front chamber (anterior chamber) o...

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Angle-closure glaucoma: This condition can be acute or chronic. It consists of increased ...

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Aqueous humor: In medicine, humor refers to a fluid (or semifluid) substance. Thus, the aq...

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Blindness: Loss of useful sight. Blindness can be temporary or permanent. Damage to any p...

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Blood pressure: The blood pressure is the pressure of the blood within the arteries. It is...

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Blurred vision: Lack of sharpness of vision with, as a result, the inability to see fine d...

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Central vision: A process in which millions of cells change light into nerve signals that ...

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Chronic: In medicine, lasting a long time. A chronic condition is one that lasts 3 months ...

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Congenital: A condition that is present at birth, whether or not it is inherited.

Diabetes: Refers to diabetes mellitus or, less often, to diabetes insipidus. Diabetes mell...

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Diagnosis: 1 The nature of a disease; the identification of an illness. 2 A ...

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Dilation: The process of enlargement, stretching, or expansion. The word "dilatation" mean...

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Drain: A device for removing fluid from a cavity or wound. A drain is typically a tube or ...

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Glaucoma: A common eye condition in which the fluid pressure inside the eyes rises becaus...

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High blood pressure: A repeatedly elevated blood pressure exceeding 140 over 90 mmHg. Chro...

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Humor: In medicine, a fluid or semifluid substance. For example, the aqueous humor is the ...

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Hypertension: High blood pressure, defined as a repeatedly elevated blood pressure exceedi...

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Incidence: The frequency with which something, such as a disease or trait, appears in a pa...

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Inflammation: A localized reaction that produces redness, warmth, swelling, and pain as a ...

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Laser: A powerful beam of light that is used in some types of surgery to cut or destroy ti...

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Lens: The transparent structure inside the eye that focuses light rays onto the retina.

Microscope: An optical instrument that augments the power of the eye to see small objects....

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Microscopic: So small it cannot be seen without the aid of microscope. As opposed to macro...

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Nerve: A bundle of fibers that uses electrical and chemical signals to transmit sensory an...

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Ocular: Having to do with the eye.

Onset: In medicine, the first appearance of the signs or symptoms of an illness as, for ex...

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Open-angle glaucoma: Glaucoma is a condition of the eye that leads to progressive atrophy ...

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Ophthalmologist: A physician who practices ophthalmology.

Optic: Having to do with vision.

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Optic nerve: The optic nerve connects the eye to the brain. The optic nerve carries the...

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Pain: An unpleasant sensation that can range from mild, localized discomfort to agony. Pa...

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Peripheral: Situated away from the center, as opposed to centrally located.

Peripheral vision: Side vision. The ability to see objects and movement outside of the di...

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Steroid: One of a large group of chemical substances classified by a specific carbon struc...

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Surgery: The branch of medicine that employs operations in the treatment of disease or inj...

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Tension: 1) The pressure within a vessel, such as blood pressure: the pressure within t...

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Trauma: A physical or emotional injury.

Visual field: The entire area that can be seen when the eye is directed forward, including...

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Vitamins: The word "vitamin" was coined in 1911 by the Warsaw-born biochemist Casimir Funk...

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