Glaucoma is managed primarily by lowering the pressure inside your eye, and several effective options exist, from daily eye drops to laser procedures to lifestyle changes that make a measurable difference. The key number to know: healthy eye pressure generally falls between 10 and 21 mmHg, though damage can occur even within that range for some people. What helps most depends on the type and stage of your glaucoma, but nearly all approaches share the same goal of reducing pressure on the optic nerve before irreversible vision loss occurs.
How Eye Drops Lower Pressure
Eye drops are the most common first-line treatment. Two main classes are typically prescribed as initial therapy, and they work in different ways. Prostaglandin analogs increase the drainage of fluid out of your eye through an alternative exit pathway. They remodel the tissue in this drainage route, creating more open space for fluid to flow through, which significantly brings pressure down. Beta blockers take the opposite approach: they slow the production of fluid inside the eye so there’s less pressure building up in the first place.
A newer class of drops works differently from anything that came before. These medications target the primary drainage system of the eye, relaxing the tissue that controls outflow resistance. Older drop classes never addressed this underlying cause of elevated pressure directly. The newer drops can also improve blood flow to the eye by relaxing blood vessel walls, and early evidence suggests they may have a protective effect on the nerve cells most vulnerable to glaucoma damage. The most common side effect is redness on the white of the eye, caused by that same blood vessel relaxation.
Laser Treatment as a First Option
Selective laser trabeculoplasty (SLT) uses short, low-energy laser pulses to stimulate the eye’s natural drainage system without causing significant tissue damage. Unlike older laser techniques that left permanent scarring, SLT targets only pigmented cells in the drainage area, sparing the surrounding tissue. This means the procedure can be repeated when the effect wears off.
And the effect does wear off. Studies show that SLT’s pressure-lowering benefit typically fades over about 24 months. After the initial treatment, roughly 36% of eyes achieved a pressure reduction greater than 20% at the two-year mark. Repeat treatments can work, though the response tends to be somewhat smaller the second time around. Many eye doctors now offer SLT as a genuine alternative to starting daily eye drops, not just a backup when drops fail. For people who struggle with the routine of daily drops or experience side effects from them, laser treatment provides a meaningful option.
Surgery for More Advanced Cases
When drops and laser aren’t enough, surgical options range from minimally invasive procedures to more traditional operations. Minimally invasive glaucoma surgery (MIGS) uses tiny devices implanted during a short procedure, often combined with cataract surgery. These devices create new drainage pathways or widen existing ones. The trade-off is straightforward: MIGS procedures are safer and recover faster than traditional surgery, but the pressure reduction they achieve tends to be modest. They work best for mild to moderate glaucoma, where the goal is often to reduce or eliminate the need for daily eye drops rather than achieve dramatic pressure lowering.
Devices that drain fluid to deeper tissue layers beneath the eye’s surface can achieve greater pressure reduction than those targeting the eye’s built-in drainage canal. For advanced glaucoma requiring aggressive pressure control, traditional filtering surgery or tube implants remain the standard, though they carry higher risk of complications.
Exercise Makes a Real Difference
Aerobic exercise produces a consistent, measurable drop in eye pressure. Walking, jogging, and cycling for 15 to 20 minutes at a pace that elevates your heart rate have all been shown to lower pressure by a small but meaningful amount. In one clinical trial, patients already on glaucoma medication still achieved an average pressure drop of about 5.7 mmHg after exercise sessions. Another study found reductions averaging 7.7 mmHg in glaucoma patients post-exercise.
Beyond the direct pressure reduction, exercise increases blood flow to the eye. Low blood flow to the optic nerve is itself a risk factor for developing glaucoma, so the combination of lower pressure and better circulation works on two fronts. Over three months of regular aerobic exercise, patients in a randomized trial showed a sustained downward trend in eye pressure. This doesn’t replace medical treatment, but it adds a layer of benefit that compounds over time.
Diet and Leafy Greens
Dietary nitrates, found abundantly in dark leafy greens, appear to lower glaucoma risk substantially. A large study following participants from two major long-running health studies found that people with the highest intake of plant-derived nitrates had a 21% lower risk of primary open-angle glaucoma overall. For the subset of glaucoma specifically linked to impaired blood flow, the risk reduction jumped to 44%. The nitrate-rich vegetables consumed most by the high-intake group included kale, spinach, chard, and mustard greens. These participants also tended to eat more antioxidant-rich and folate-rich foods generally, so the benefit likely reflects an overall pattern of vegetable-heavy eating rather than one magic ingredient.
How You Sleep Matters
Eye pressure naturally rises when you lie flat, which is why nighttime pressure spikes are a concern for glaucoma patients. Elevating your head during sleep can counteract this. Raising the head of the bed by about 30 degrees reduced pressure by an average of 2.8 mmHg compared to lying flat. Across multiple studies, head elevation of 20 to 30 degrees produced reductions ranging from 1.5 to 3.2 mmHg.
The method matters, though. Using a wedge pillow or raising the head of the bed frame (by placing blocks under the legs, for example) works better than stacking regular pillows. In one study, simply piling up pillows did not produce a statistically significant pressure drop, likely because pillows bend the neck without truly elevating the head relative to the heart. A proper wedge or tilted bed keeps the whole upper body on an incline.
Vitamin B3 and Nerve Cell Protection
One of the more promising areas of glaucoma support involves nicotinamide, a form of vitamin B3. The nerve cells damaged in glaucoma are among the most energy-hungry cells in the body, and they rely heavily on a molecule called NAD to fuel their metabolism. NAD levels in the retina decline with age, making these nerve cells increasingly vulnerable to pressure-related stress. Glaucoma patients have also been found to have lower blood levels of nicotinamide, which the body uses to produce NAD.
In a clinical study of 57 glaucoma patients already receiving standard treatment, supplementation with 1.5 grams per day of nicotinamide (increased to 3 grams per day after six weeks) improved inner retinal nerve function compared to placebo. Visual field testing, which measures peripheral vision, showed improvement of at least 1 decibel in 27% of patients taking nicotinamide versus deterioration in only 4%. Animal studies have been even more striking, with high-dose nicotinamide protecting 70 to 93% of eyes from glaucomatous nerve damage. Large-scale human trials are currently underway to confirm whether these benefits hold up over longer periods.
Screening Frequency by Age and Risk
Catching glaucoma early is its own form of help, since lost vision cannot be recovered. The American Academy of Ophthalmology recommends a baseline comprehensive eye exam at age 40 for adults without risk factors. From there, the schedule depends on your age: every 2 to 4 years for ages 40 to 54, every 1 to 3 years for ages 55 to 64, and every 1 to 2 years after age 65.
If you’re at higher risk, particularly if you’re Black, have a family history of glaucoma, or are very nearsighted, the timeline accelerates. The AAO recommends that Black adults under 40 get comprehensive exams every 2 to 4 years, with the interval narrowing to every 1 to 2 years after age 55. Annual exams before age 40 in people without risk factors are not recommended and add cost without clear benefit.