Differences Between Open-Angle and Closed-Angle Glaucoma

Glaucoma is a leading cause of vision loss, and many people do not realize they have it until it has already affected their sight. There are two main types: open-angle and closed-angle glaucoma. Understanding how they are different is important, especially for early detection and treatment. 

The board-certified ophthalmologists and optometrists at Eye Care Institute (ECI) in Santa Rosa, California, diagnose and treat both types, helping patients throughout Sonoma County protect their vision.

How Are Open-Angle and Closed-Angle Glaucoma Different?

Both conditions involve increased pressure inside the eye, known as intraocular pressure (IOP), which can damage the optic nerve. However, they develop in different ways:

• Open-angle glaucoma happens when the eye’s drainage system does not work as well as it should, causing fluid to build up slowly over time. Because this process is gradual, there are often no early warning signs. Many people do not notice vision loss until the condition has already progressed.
• Closed-angle glaucoma is when the drainage angle suddenly becomes blocked, leading to a rapid spike in eye pressure. This can cause severe eye pain, headaches, nausea, blurry vision, and halos around lights. 

Unlike open-angle glaucoma, which develops slowly, closed-angle glaucoma is a medical emergency that requires immediate care to prevent vision loss. It is considered the more serious of the two types because of its urgency.

Do They Require Different Treatments?

Yes, because open-angle and closed-angle glaucoma progress differently, they are treated uniquely with the following methods: 

• Open-angle glaucoma is usually managed with prescription eye drops to lower eye pressure. In some cases, you could need laser therapy or surgery to improve fluid drainage. Since symptoms are often not noticeable at first, regular eye exams are the best way to detect it early and prevent vision damage.
• Closed-angle glaucoma requires immediate treatment to quickly reduce eye pressure and prevent you from permanently losing your vision. This can involve medications, laser treatment, or surgery to reopen the drainage angle. Because it develops so quickly, anyone experiencing sudden eye pain or vision changes should seek medical attention right away.

Schedule an Eye Exam in Santa Rosa, CA

Glaucoma can cause irreversible vision loss, but early diagnosis and treatment can help protect your sight. If you have concerns about glaucoma, call Eye Care Institute at 707.546.9800 to schedule an eye exam with one of our specialists in Santa Rosa, CA.

Disclaimer: The information provided on this blog is for informational purposes only and should not be considered medical advice. Consult your PCP or eye doctor before starting any new therapies. To schedule a consultation, please contact us.