Glaucoma
A group of eye diseases that can damage the optic nerve.
Glaucoma is a group of eye diseases that can lead to damage of the optic nerve, which transmits visual information from the eye to the brain. It may cause vision loss if left untreated and has been called the 'silent thief of sight' because the loss of vision usually occurs slowly over a long period of time. A major risk factor is increased pressure within the eye, known as intraocular pressure (IOP).
- field
- Ophthalmology
- known_for
- Leading cause of blindness; group of eye diseases damaging the optic nerve
- global_prevalence_2013
- 3.54% among population aged 40-80 years
- global_cases_2013
- 64.3 million
- us_cases_2022
- 4.22 million
Lore & Background
The word glaucoma comes from the Ancient Greek word γλαυκός (glaukós), meaning 'gleaming, blue-green, gray'. Of the different types, the most common are open-angle glaucoma and closed-angle glaucoma. Inside the eye, a liquid called aqueous humor, produced by the ciliary body, normally drains through the trabecular meshwork. In open-angle glaucoma, drainage is impeded, causing pressure buildup; in closed-angle glaucoma, drainage becomes suddenly blocked, leading to rapid pressure increase and symptoms such as intense eye pain, blurred vision, and nausea.
Reader's Guide
Glaucoma is a leading cause of blindness globally, second only to cataracts. In the United States, it disproportionately affects African Americans, Hispanic Americans, and Asians. Its incidence rises with age, exceeding eight percent of Americans over age eighty. Early detection through regular eye examinations, especially for those over 40 or with a family history, is essential. Treatment includes eye drops, medication, laser treatment, or surgery, all aimed at decreasing eye pressure. The condition's pathophysiology centers on damage to the optic nerve, with intraocular pressure being a key but not exclusive factor.
Did You Know?
- Glaucoma has been called the 'silent thief of sight' because vision loss usually occurs slowly over a long period.
- Closed-angle glaucoma is a medical emergency that can cause intense eye pain, blurred vision, and nausea.
- Only about 10–70% of people with primary open-angle glaucoma actually have elevated ocular pressure, depending on ethnic group.
Frequently Asked Questions
Who is Glaucoma?
Glaucoma is a collection of eye conditions that attack the optic nerve, the cable carrying visual signals from the eye to the brain. It operates in the field of ophthalmology and is widely recognized as a leading cause of irreversible blindness worldwide.
What are Glaucoma's powers/role?
Its signature ability is the 'silent thief of sight' move: vision fades so gradually that most people don't notice until substantial damage is already done. A major power amplifier is elevated intraocular pressure, which steadily wears down the optic nerve over time.
How does Glaucoma's story end?
If left untreated, the narrative concludes in permanent, irreversible vision loss because destroyed optic-nerve fibers cannot regenerate. There is no cure once that nerve damage is complete, making the ending tragically final.
What's Glaucoma's biggest weakness?
Early detection and consistent monitoring of intraocular pressure are its greatest vulnerabilities, because catching the condition before major nerve damage occurs lets treatments slow or halt progression. Regular eye exams are essentially the counter-move that keeps Glaucoma from winning the fight.
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