Glaucoma is treated primarily by lowering the pressure inside your eye, and most people start with prescription eye drops. Normal eye pressure ranges from 10 to 21 mmHg, and the goal of every treatment, whether drops, laser, or surgery, is to bring that number down enough to stop the optic nerve from sustaining further damage. The right approach depends on the type of glaucoma you have, how advanced it is, and how well you respond to initial treatment.
Eye Drops: The Most Common Starting Point
Prescription eye drops are the first treatment most people receive. Several classes of drops exist, each working through a different mechanism, and your doctor will typically start with whichever class offers the strongest pressure reduction with the fewest side effects for your situation.
Prostaglandin analogs are the most widely prescribed first-line drops. They work by relaxing a muscle inside the eye and remodeling the tissue around the eye’s drainage pathways, allowing fluid to exit more freely. A large pooled analysis found these drops lower eye pressure by roughly 28 to 33 percent, making them the most effective single-drug option available. They’re dosed once daily, usually at bedtime, which makes them convenient. Common side effects are mostly cosmetic: gradual darkening of the iris, longer or thicker eyelashes, and mild redness.
Beta-blocker drops are another longstanding option, lowering pressure by about 26 to 27 percent. They reduce the amount of fluid your eye produces. Because beta-blockers can be absorbed into the bloodstream, they sometimes cause systemic effects like fatigue, low blood pressure, slowed heart rate, and shortness of breath. People with asthma or certain heart conditions may need to avoid them.
Other drop classes include alpha-adrenergic agonists, which can cause dry mouth, headache, and fatigue, and carbonic anhydrase inhibitors, which typically produce a milder pressure reduction of around 17 to 22 percent. Many people end up using a combination of two or more drop types to reach their target pressure.
A Newer Class of Drops
A newer type of medication, called a Rho-kinase inhibitor, works differently from all older drop classes. Instead of rerouting fluid through alternative drainage pathways or simply reducing fluid production, it directly relaxes the eye’s primary drainage tissue (the trabecular meshwork) where most of the resistance to fluid outflow actually occurs. It also lowers the pressure in the veins that receive fluid from the eye and reduces fluid production, giving it a three-pronged mechanism that no other single drop offers. This makes it a useful option for people whose pressure needs to drop below normal levels to prevent further damage, and it shows particular promise for glaucoma caused by steroid medications.
Reducing Side Effects From Drops
A simple technique called punctal occlusion can reduce the amount of medication that enters your bloodstream. After placing a drop, close your eyes and press gently on the inner corner of your eye (near your nose) for one to two minutes. This blocks the tear duct that would otherwise drain the medication into your nasal passages and bloodstream. Keeping your eyes closed also helps the drop absorb into the eye rather than spilling onto your cheek. If you use multiple drops, wait at least five minutes between them so the first drop isn’t washed away by the second.
Laser Treatment as a First Option
Selective laser trabeculoplasty, commonly called SLT, is no longer reserved for people who fail on drops. It’s now considered a legitimate first-line treatment for the most common form of glaucoma (open-angle). The procedure takes a few minutes in a clinic, uses low-energy laser pulses to stimulate the eye’s natural drainage tissue, and requires no incisions.
When used as a primary treatment (before any drops), about 65 percent of patients reach their target pressure with SLT alone. When combined with additional medication if needed, that number climbs above 94 percent. For people already on drops, SLT allowed over 70 percent to either reduce or eliminate their medications. The pressure-lowering effect typically holds for about one to two years, and the procedure can be repeated.
SLT appeals to many patients because it removes the daily burden of eye drops, avoids systemic side effects entirely, and carries very low risk. Temporary mild inflammation or a short-term pressure spike after the procedure are the most common complications.
Surgery for Advanced or Resistant Glaucoma
When drops and laser aren’t enough, surgery creates a new physical pathway for fluid to drain from the eye. The two broad categories are traditional surgery and newer micro-invasive procedures.
Traditional Surgery
Trabeculectomy has been the gold standard for decades. The surgeon creates a small flap in the white of the eye that allows fluid to drain into a pocket beneath the surface tissue, where it’s gradually absorbed by the body. It produces a larger pressure drop than micro-invasive techniques (roughly 2 mmHg more on average), making it the better choice when pressure needs to come down significantly. Recovery takes several weeks, and you’ll need frequent follow-up visits during the first month or two.
Micro-Invasive Glaucoma Surgery (MIGS)
MIGS refers to a family of procedures that use tiny devices or small incisions inside the eye to improve drainage. Compared to trabeculectomy, MIGS procedures produce a somewhat smaller pressure reduction but offer a meaningfully better safety profile: roughly 55 percent lower risk of bleeding complications and about 53 percent lower risk of significant vision changes after surgery. Patients who undergo MIGS also tend to use fewer eye drops afterward than those who have trabeculectomy.
MIGS is often performed during cataract surgery, making it a practical option for people who need both procedures. It’s best suited for mild to moderate glaucoma. If you have advanced disease with very high pressures, trabeculectomy or a tube shunt (a small implanted drainage device) remains the more reliable choice.
Acute Angle-Closure: A Different Situation
Not all glaucoma develops gradually. Acute angle-closure glaucoma is a sudden emergency where the drainage angle inside the eye slams shut, trapping fluid and causing pressure to spike dramatically. Symptoms include severe eye pain, headache, nausea, vomiting, blurred vision, and halos around lights. This requires immediate treatment, typically in an emergency department or eye clinic.
The initial step is lying flat on your back, which shifts the lens position inside the eye and can partially relieve the blockage. Multiple medications are given rapidly to force pressure down. Once the pressure is controlled, the definitive treatment is a laser iridotomy: creating a tiny hole in the colored part of the eye (the iris) to restore fluid flow between the eye’s chambers. If the other eye is at risk, which it often is, the procedure is done on both sides. In patients who also have a cataract, removing the cataract itself can serve as a permanent fix because the thickened lens is frequently what triggered the blockage.
How Exercise Helps Lower Eye Pressure
Aerobic exercise produces a real, measurable drop in eye pressure. In a clinical trial of patients with open-angle glaucoma, just 10 minutes of light cycling lowered eye pressure by about 2.4 mmHg. When the intensity increased to moderate effort, pressure dropped by nearly 6 mmHg from baseline. At the same time, blood flow to the optic nerve improved, which is important because poor blood supply to the nerve contributes to glaucoma damage independently of pressure.
Long-term exercise offers sustained benefits. In the same study, patients who jogged for 30 minutes most mornings (at least 20 sessions per month) for three months showed generally lower pressure readings across the entire day compared to baseline. The reductions were especially noticeable in early morning hours, when eye pressure naturally peaks and poses the greatest risk.
A practical target is 30 minutes of moderate aerobic activity, like brisk walking, jogging, cycling, or swimming, on most days. One caution: certain yoga poses and heavy weightlifting that involve inverted positions or prolonged straining can temporarily raise eye pressure, so these are worth discussing with your eye doctor.
Ongoing Monitoring Matters
Glaucoma damage is irreversible, which makes regular monitoring essential. The American Academy of Ophthalmology recommends visual field testing at least once a year to check for blind spots developing in your peripheral vision. Many patients, particularly those with progressive disease or recently changed treatment, need testing more often. Delays in detecting progression mean delays in adjusting treatment, and lost vision cannot be recovered.
Your appointments will also include measurement of your eye pressure and, in most practices, imaging of the optic nerve and the nerve fiber layer at the back of the eye. These scans can detect structural thinning before you notice any vision change, giving your doctor a chance to intervene earlier. If your glaucoma is stable on current treatment, annual visits may suffice. If there’s any sign of progression, expect visits every three to six months until the situation stabilizes.