Glaucoma is one of the leading causes of permanent vision loss worldwide, often progressing silently until damage has already occurred. In the United States alone, over 2.5 million people over the age of 40 are affected by this serious eye condition—and many don’t even realize they have it.

Often referred to as the “silent thief of sight,” glaucoma typically presents no early symptoms, making routine eye exams the only reliable method of early detection. While the vision loss it causes is irreversible, the good news is that glaucoma can be slowed or stopped with timely intervention and proper management.

If you or a loved one is at risk, understanding the nature of glaucoma and the importance of proactive care is essential.

 

What Is Glaucoma?

Glaucoma refers to a group of eye diseases that damage the optic nerve, the part of the eye responsible for transmitting visual information from the retina to the brain. Most types of glaucoma are associated with elevated intraocular pressure (IOP)—caused by a buildup of fluid (aqueous humor) in the eye. Over time, this pressure damages the optic nerve fibers, leading to gradual and permanent loss of vision.

There are several types of glaucoma, but the two most common are:

1. Primary Open-Angle Glaucoma

• The most common form in the U.S. 
• Develops slowly and painlessly 
• Caused by a slow clogging of the eye’s drainage canals 
• Often goes unnoticed until peripheral (side) vision begins to deteriorate 

2. Angle-Closure Glaucoma

• A less common but more acute form 
• Occurs when the drainage angle between the iris and cornea becomes blocked suddenly 
• Can cause rapid vision loss and is considered a medical emergency 

 

Early Detection Is Critical

Because glaucoma-related vision loss is permanent, the key to preserving sight lies in early detection and ongoing monitoring. Unfortunately, most people with early-stage glaucoma have no warning signs. That’s why regular comprehensive eye exams are essential—especially if you’re over 40 or have risk factors.

During a glaucoma screening at Dr. Giulio Diamante and Associates in Johnston, Rhode Island, several tests may be performed to assess your risk and evaluate your eye health:

Key Glaucoma Screening Tests:

• Visual Acuity Test: Measures how well you see at various distances. 
• Visual Field Test: Assesses peripheral (side) vision to detect blind spots. 
• Tonometry: Measures the pressure inside your eye (intraocular pressure). 
• Pachymetry: Measures the thickness of your cornea, which can affect IOP readings. 
• Dilated Eye Exam: Allows the doctor to inspect the optic nerve and retina for signs of damage. 
• Optical Coherence Tomography (OCT): Produces detailed images of the optic nerve fibers to detect thinning or deterioration. 

The earlier glaucoma is detected, the more effectively it can be managed—often before significant vision loss occurs.

 

Risk Factors for Glaucoma

Certain individuals have a higher risk of developing glaucoma. These risk factors include:

• Age over 60 
• Family history of glaucoma 
• African, Hispanic, or Asian descent 
• High intraocular pressure 
• Diabetes or hypertension 
• Thin corneas 
• Prolonged use of corticosteroids 
• Previous eye injury or surgery 

If you fall into one or more of these categories, regular exams become even more critical to protecting your sight.

 

Available Treatments to Slow Progression

While there is currently no cure for glaucoma, a variety of effective treatments can lower intraocular pressure and prevent further vision loss. Treatment is highly individualized and depends on the type and severity of your glaucoma.

1. Prescription Eye Drops

These are often the first line of treatment. They help reduce eye pressure in various ways:

• Prostaglandin analogs: Increase fluid outflow from the eye 
• Beta blockers: Decrease fluid production 
• Alpha agonists: Reduce fluid production and increase drainage 
• Carbonic anhydrase inhibitors: Reduce fluid production 
• Cholinergic agents (miotics): Increase drainage of fluid 

Most glaucoma patients will need to use eye drops daily, often for life, to maintain a safe eye pressure.

2. Oral Medications

In cases where eye drops aren’t sufficient, oral medications like carbonic anhydrase inhibitors may be prescribed. These drugs reduce fluid production in the eye and help control pressure.

3. Laser Procedures

Laser treatments can be highly effective in managing glaucoma, particularly if medications alone aren’t enough:

• Laser Trabeculoplasty (SLT or ALT): Used for open-angle glaucoma. It improves fluid drainage by targeting the trabecular meshwork (the eye’s natural drainage system). 
• Laser Iridotomy: Used for angle-closure glaucoma. A tiny hole is created in the iris to allow fluid to flow more freely and relieve pressure. 

4. Surgical Options

If medications and laser therapy don’t adequately control eye pressure, surgical intervention may be needed:

• Trabeculectomy: A new drainage channel is created to help fluid leave the eye. 
• Glaucoma drainage implants (shunts or tubes): These devices divert fluid from inside the eye to reduce pressure. 
• Minimally Invasive Glaucoma Surgery (MIGS): Newer surgical options that are less invasive, often performed alongside cataract surgery. 

Your ophthalmologist will determine the best course of action based on your eye pressure, optic nerve health, and overall treatment goals.

 

Don’t Wait—Take Action Early

The message is clear: glaucoma is irreversible, but it is not unstoppable. With early diagnosis, regular monitoring, and the right treatment plan, most people with glaucoma can preserve their vision for life.

Because the disease can be so stealthy, it’s critical not to wait for symptoms to appear. By the time vision loss becomes noticeable, permanent damage has often already occurred.

 

Final Thoughts

Glaucoma may not be curable, but it is very manageable—especially when caught early. Regular eye exams, consistent treatment, and follow-up care are your strongest defense against vision loss.

If you’re due for an exam, or if you have risk factors or concerns about glaucoma, don’t delay. Schedule a comprehensive eye screening today with Dr. Diamante in Johnston, Rhode Island, and take the first step toward protecting your vision for the future.