Managing Eye Pressure & Stress: Proactive Glaucoma Care

Why Glaucoma Is Not Only About Eye Pressure

In this webinar, glaucoma specialist and cataract surgeon Dr. Brian Ang presents a holistic framework for managing glaucoma that extends well beyond intraocular pressure (IOP) control. Drawing on his clinical experience, published research, and the deeply personal story of his own father's vision loss from normal-tension glaucoma, Dr. Ang outlines five "blind spot habits" that may silently contribute to optic nerve damage — and five corresponding pillars of proactive glaucoma care that patients can adopt alongside their prescribed treatments.

Normal-Tension Glaucoma and the Optic Nerve

Dr. Ang opens with a striking statistic: approximately 30 to 40 percent of open-angle glaucoma patients have normal eye pressure, and in certain Asian populations that figure climbs to 92 percent. His father, a retired physician in Malaysia, lost half his vision from glaucoma despite never having elevated intraocular pressure. This personal experience drove Dr. Ang to research what else can be done for glaucoma beyond lowering IOP.

The answer centers on the optic nerve — the high-bandwidth cable connecting the eye to the brain. Because of its enormous metabolic demands, the optic nerve is highly vulnerable to damage from daily stress, poor circulation, and physical aging, not just from elevated eye pressure. Strengthening the optic nerve and increasing its resilience is therefore a critical complement to standard IOP-lowering treatments like eye drops, SLT laser, and surgery.

Pillar 1: Physical Exercise and Glaucoma Risk

The first blind spot habit Dr. Ang identifies is excessive screen time — not because screens directly raise intraocular pressure, but because sedentary behavior means less circulation to the optic nerve. Research shows that people who do not engage in regular physical activity face a 2.4-times increased risk of glaucoma, while those who maintain moderate-to-brisk aerobic exercise may reduce their risk by up to 58 percent. Even 30 minutes of brisk walking daily can make a meaningful difference over time.

For patients with pigment dispersion glaucoma, where high-impact exercise like running can sometimes spike IOP, Dr. Ang recommends using a home tonometer such as the iCare HOME2 to check pressure before and after a run. If IOP does not spike, the patient can continue running safely. This is a clear example of how home monitoring allows personalized, data-driven decisions rather than blanket restrictions.

Pillar 2: Stress Management and Eye Pressure

Chronic stress elevates circulating cortisol, a steroid hormone that can raise intraocular pressure. A recent study found that stressed glaucoma patients experienced IOP elevations of over 4 mmHg, and separate research showed that each one-point increase on a 10-point stress scale was associated with an 11 percent increase in glaucoma risk. Dr. Ang recommends mindfulness meditation and a simple deep-breathing protocol — five seconds in, five seconds out, for a few minutes three times daily. Research suggests this practice can reduce eye pressure by approximately 12.5 percent while also lowering blood pressure and circulating stress hormones.

Pillar 3: Sleep Quality and Duration

Sleep is when the body regulates cortisol, restores blood flow, and clears metabolic waste from neural tissue. Patients who sleep three hours or fewer per night face a threefold increase in glaucoma-related vision loss, while sleeping more than 10 hours also carries elevated risk. The optimal target is seven to eight hours of quality sleep each night.

During the Q&A, Dr. Ang addresses sleep apnea and glaucoma directly: untreated sleep apnea can increase glaucoma risk by 10 times. If a patient has sleep apnea, getting it properly treated should be a top priority. On the question of sleeping on a wedge pillow to reduce supine IOP elevation, Dr. Ang advises prioritizing deep, restorative sleep over marginal positional pressure reductions. He suggests patients use the iCare HOME2 to measure their own pressure in different sleep positions, then make a data-informed decision rather than enduring discomfort for an uncertain benefit.

Pillar 4: Nutrition, Sugar, and Glaucoma

Excess dietary sugar increases systemic inflammation and insulin resistance, impairing blood flow and cell metabolism in a way that creates a hostile metabolic environment for the optic nerve. Dr. Ang cites research suggesting that a high-sugar diet can increase glaucoma risk by 51 percent, whereas patients who eat a diet rich in fruits, vegetables, fish, and eggs — real, minimally processed foods — may have up to 79 percent less risk. He encourages patients to be mindful of hidden sugars in ultra-processed foods, sauces, and so-called healthy snacks.

Pillar 5: Neuroprotection and Supplements for Glaucoma

The fifth pillar addresses what Dr. Ang calls the "neuroprotection gap" — the fact that standard glaucoma care focuses on lowering IOP but does not typically support optic nerve health at a cellular level. Dr. Ang spent over two years developing the NP-10 system, an evidence-based framework that targets 10 biocellular mechanisms across four core areas: pressure and stress reduction, cellular function support, vascular circulation, and optic nerve maintenance.

For pressure and stress support, saffron has been shown in studies to potentially reduce intraocular pressure by 15.5 percent in stable open-angle glaucoma and to improve mood and reduce the impact of stress by up to 50 percent. For cellular energy, the nicotinamide form of vitamin B3 — not niacin — helps recharge stressed retinal ganglion cells. Dr. Ang recommends 500 milligrams daily as a safe long-term dose, noting that the 2,000–3,000 mg doses used in some clinical trials risk liver toxicity. One of his own patients experienced liver issues at just 1,000 mg. Pyruvate, studied in combination with nicotinamide, can be sourced naturally from apple skin. Folate and vitamin B12 support cell repair and help reduce homocysteine levels, which are a risk factor for vascular disease. For circulation, ginkgo biloba and bilberry have been shown to increase blood flow to the visual system by 23 percent, with some evidence suggesting they may slow visual field loss in normal-tension glaucoma. Grape seed proanthocyanidins provide targeted antioxidant protection at the cellular level.

Home Monitoring Ties It All Together

A recurring theme throughout the webinar is that lifestyle changes should be validated with objective data. Whether a patient is testing whether running spikes their IOP, whether a wedge pillow lowers nighttime pressure, or whether a supplement is having an effect, the iCare HOME2 tonometer provides the diurnal curve data needed to make personalized decisions. Several attendees shared their own experiences during the Q&A — one patient discovered nighttime spikes into the 40s that were completely invisible during daytime office visits, and another's physician presented the patient's dense home data set at a medical conference because it shortened the diagnostic timeline by years. Dr. Ang and MyEyes co-founder Dr. Barbara Roscoe both emphasized that nocturnal IOP spikes between midnight and 6 a.m. are common and clinically significant, reinforcing why single office readings are insufficient for comprehensive glaucoma management.