(Acute Angle-Closure Glaucoma; Single Angle-Closure Glaucoma)
DefinitionGlaucoma represents a group of eye disorders that may cause damage to the optic nerve due to high intraocular pressure. Glaucoma is a degenerative eye disease and one of the leading causes of blindness in the United States. Angle-closure glaucoma is a condition in which the iris in the eye shifts and blocks the exit passageway of the fluid in the front compartment of the eye. This fluid blockage causes a rapid build-up of pressure in the eye.Angle-closure glaucoma is an emergency condition that requires immediate medical treatment to preserve vision.
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CausesThe exact cause of narrow-angle glaucoma is unknown. However, factors that play a role in causing the disease include:
- Narrowing of the drainage angle in the eye—Aging and being farsighted are two causes of this narrowing.
- Being born with narrow angles—more common in people who are Asian
- Injury to the eye
- Botulism injections around the eye
- Sulfa-based drugs
- Phenothiazines and monoamine oxidase inhibitors
- Medications to treat Parkinson's disease
Risk FactorsAngle-closure glaucoma is more common in older aging adults and in Asian people. Other factors that may increase your chance of developing angle-closure glaucoma include:
- Family history of narrow angle glaucoma
- Injury to the eye
- Eye drops used to dilate the eyes
- Certain systemic medications
- Developing cataracts
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