Types of Glaucoma
There are several types of glaucoma, but the two most common types are open-angle and angle-closure. Some people experience normal-tension glaucoma – a form of glaucoma where the intraocular pressure is within the normal range, but there is still damage to the optic nerve. The exact reason is unknown, although it could be associated with sensitive optic nerves or high blood pressure.
Open-angle glaucoma, also known as primary or chronic glaucoma, is the most common form of glaucoma. It occurs when the fluid in your eyes (the aqueous humor) is being prevented from draining properly, resulting in increased intraocular pressure. This form of glaucoma progresses slowly.
Symptoms aren’t noticeable until the disease has advanced and has likely caused partial vision loss or blindness. When they do materialize, symptoms include patchy blind spots in your peripheral or central vision and tunnel vision.
Angle-closure glaucoma, also known as acute glaucoma or narrow-angle glaucoma, is less common than open-angle glaucoma and comes on suddenly and painfully. It occurs when the iris expands outwards and blocks the drainage canals, resulting in sudden intraocular pressure.
Symptoms are very noticeable and include severe headache, eye pain, nausea, vomiting, blurred vision, light halos, and eye redness.
Angle-closure glaucoma is an eye emergency. If you are experiencing any of the above symptoms, call us immediately.