There are spaces between structures in the front of the eye. Fluid can drain out of the eye through these spaces. In ACG, these spaces shrink. Fluid can not pass out of the eye well. The extra fluid in the eye causes pressure in the eye to increase. Acute ACG may happen when structures of the eye slip and block these spaces. Chronic ACG may be caused by changes in the eye that happen slowly over time.
It is not clear why these changes happen. Some factors that play a role include:
Blood flow problems to the eye
Injury to the eye
Conditions that cause thickening of the lens of the eye
Areas of the eye can rub against each other with chronic glaucoma. This can cause damage to the drain. It will make it harder for fluid to drain well.
Medicine that may play a role include:
Botulism injections around the eye
Phenothiazines and monoamine oxidase inhibitors
Medicine to treat Parkinson disease
ACG is more common in older adults. Other factors that may increase your chance of developing angle-closure glaucoma include:
Family history of narrow angle glaucoma
Injury to the eye
Actions that cause sudden and fast widening of iris such as:
Eye drops used to dilate the eyes
Walking into dark room
There are few or no symptoms with chronic ACG. Acute ACG, also known as crisis may lead to:
Severe pain in the eye
Sudden vision loss
Blurred or cloudy vision
Halo around lights
Redness and swelling of the eye
Acute ACG often happens in one eye at a time.
Chronic ACG may have had brief episodes of the symptoms above. The loss of space may happen in both eyes.
You will be asked about your symptoms and past health. A physical exam will be done. You will be referred to an eye specialist.
Angle-Closure glaucoma. American Academy of Ophthalmology website. Available at: https://www.aao.org/munnerlyn-laser-surgery-center/angleclosure-glaucoma-19. Updated December 18, 2013. Accessed February 12, 2019.
Angle-closure glaucoma. Glaucoma Research Foundation website. Available at: http://www.glaucoma.org/glaucoma/angle-closure-glaucoma.php. Updated January 14, 2015. Accessed February 12, 2019.
What is glaucoma? American Academy of Ophthalmology website. Available at: http://www.geteyesmart.org/eyesmart/diseases/glaucoma.cfm. Updated April 15, 2018. Accessed February 12, 2019.
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