Understanding the Different Types of Glaucoma

Glaucoma is a group of eye conditions that damage the optic nerve, which connects your eye to your brain and allows you to see. This damage usually happens when pressure builds up inside the eye. At ReFocus Eye Health Stamford, our eye doctors help patients throughout Stamford, Darien, Norwalk, Greenwich, and across Fairfield County understand and manage all forms of this serious condition.

Common Forms of Glaucoma

There are several different types of glaucoma, each with unique characteristics and treatment approaches. Understanding which type you have helps our ophthalmologists create the best treatment plan for protecting your vision.

Primary Open-Angle Glaucoma

Primary open-angle glaucoma is the most common type, affecting about nine out of every ten people with glaucoma. In this form, the drainage system inside your eye slowly becomes blocked over time, even though the drainage angle stays open. This causes pressure to build up gradually, often without any symptoms until vision loss begins. Because it develops so slowly and painlessly, many people don’t realize they have it until they visit their eye doctor for a regular exam.

• Develops slowly over months or years without warning signs
• Usually affects both eyes but may be worse in one eye
• Can be detected early through regular comprehensive eye exams
• Most people respond well to treatment when caught early

Angle-Closure Glaucoma

Angle-closure glaucoma happens when the drainage angle between your iris and cornea becomes blocked or closes. This can occur gradually or suddenly. When it happens suddenly, it becomes a medical emergency that requires immediate care. This type is less common than open-angle glaucoma but can cause severe damage very quickly if not treated right away.

• Acute form causes sudden, severe eye pain and blurred vision
• May include headache, nausea, and seeing halos around lights
• Chronic form develops slowly with few symptoms
• Requires immediate medical attention if symptoms appear suddenly

Normal-Tension Glaucoma

Normal-tension glaucoma is a puzzling form where the optic nerve becomes damaged even though eye pressure stays within the normal range. Doctors and researchers are still studying why this happens. Some experts believe it may be related to poor blood flow to the optic nerve or that some people’s optic nerves are more sensitive to pressure. This type is more common in people with a history of migraines or low blood pressure.

• Occurs even when eye pressure measures normal
• May be linked to reduced blood flow to the optic nerve
• Vision loss often starts closer to the center of vision
• Still treated by lowering eye pressure to protect remaining vision

Congenital Glaucoma

Congenital glaucoma is a rare form that appears in babies and young children, usually before age three. It happens when the drainage channels in the eye don’t develop properly before birth. Parents may notice their baby’s eyes appear larger than normal, cloudy, or very sensitive to light. The baby may also tear excessively or rub their eyes frequently. Early detection and surgical treatment are essential to prevent permanent vision loss in affected children.

• Present at birth or develops in the first few years of life
• Causes enlarged eyes, cloudy corneas, and excessive tearing
• Usually requires surgery to correct drainage problems
• Early treatment is critical for preserving vision

Secondary Glaucoma

Secondary glaucoma develops as a result of another eye condition, injury, or disease. Unlike primary glaucoma, which has no known cause, secondary glaucoma has an identifiable trigger. Common causes include eye inflammation like uveitis, eye injuries from accidents or sports, certain medications like steroids, and complications from other eye diseases. Treatment focuses on addressing both the underlying cause and managing the increased eye pressure.

• Caused by eye injuries, inflammation, or other eye diseases
• May develop after eye surgery or from certain medications
• Can occur from conditions like diabetes or tumors
• Treatment targets both the cause and the high eye pressure

Which Type Requires Emergency Care?

Acute angle-closure glaucoma is the most severe form and requires immediate emergency medical attention. This condition occurs when the drainage angle suddenly and completely closes, causing eye pressure to spike rapidly within hours. Without quick treatment, permanent vision loss can happen in just one day.

Warning Signs of an Emergency

Recognizing the symptoms of acute angle-closure glaucoma can save your vision. If you experience any of these symptoms, contact our eye doctors immediately or go to the nearest emergency room. Time is critical when dealing with this type of glaucoma, and every hour matters in preventing permanent damage to your optic nerve.

• Severe eye pain that doesn’t go away
• Sudden blurred vision or vision loss
• Intense headache, often on the same side as the affected eye
• Seeing rainbow-colored halos around lights
• Nausea and vomiting along with eye symptoms
• Red eye with a hazy or cloudy cornea

Treatment Options for Different Types of Glaucoma

Each type of glaucoma requires a specific treatment approach based on its cause and severity. Our ophthalmologists at ReFocus Eye Health Stamford work with you to find the most effective treatment for your individual situation.

Medical Treatments

Most people with glaucoma begin treatment with prescription eye drops designed to lower eye pressure. These medications work by either reducing the amount of fluid your eye produces or helping fluid drain more easily. Some patients may also need oral medications to provide additional pressure control. Regular use of these medications as prescribed is essential for protecting your vision over time.

Laser Treatments

Laser therapy offers an effective option for many types of glaucoma. For open-angle glaucoma, selective laser trabeculoplasty helps improve drainage by treating the eye’s natural drainage system with a gentle laser. For angle-closure glaucoma, laser peripheral iridotomy creates a small opening in the iris to allow fluid to flow more freely. These procedures are typically performed in our office and take only a few minutes to complete.

Traditional Glaucoma Surgery

When medications and laser treatments aren’t enough to control eye pressure, traditional glaucoma surgery may be recommended. These procedures create new drainage pathways for fluid to leave the eye. While more invasive than other options, traditional surgery can effectively lower eye pressure for patients with advanced or difficult-to-control glaucoma. Our experienced ophthalmologists will discuss whether this option is right for you.

Minimally Invasive Glaucoma Surgery

Minimally invasive glaucoma surgery, or MIGS, has become an increasingly popular treatment option at ReFocus Eye Health Stamford. These advanced procedures use tiny instruments and microscopic devices to improve drainage with much smaller incisions than traditional surgery. MIGS offers several important advantages, especially for patients with mild to moderate glaucoma who haven’t achieved good pressure control with medications alone.

• Smaller incisions cause less trauma to delicate eye tissue
• Faster healing and quicker return to normal activities
• Lower risk of complications compared to traditional surgery
• Can often be combined with cataract surgery
• Effective at controlling eye pressure long-term
• May reduce or eliminate the need for daily eye drops

Protecting Your Vision from Glaucoma

Early detection and treatment are essential for preventing vision loss from any type of glaucoma. If you have concerns about glaucoma, have been diagnosed with this condition, or are due for a comprehensive eye exam, ReFocus Eye Health Stamford is here to help. Our experienced ophthalmologists serve patients throughout Stamford and surrounding communities including Darien, Norwalk, Greenwich, and across Fairfield County with advanced diagnostic technology and the latest treatment options. Schedule your consultation today to learn more about protecting your vision for years to come.