Glaucoma: Why Regular Eye Checks Matter, Even When Your Vision Feels Perfect

A few years ago, I saw a patient in her forties who had every reason to think her eyes were fine. She'd had refractive surgery in the past, her distance vision was excellent, and she no longer needed glasses. So, she stopped seeing her optometrist. From where she stood, there was nothing to check.

When she finally came in several years later, it was because her vision had started to slip. By then, the pressure in her eyes was high and the damage to her peripheral vision was advanced. She had glaucoma, and a meaningful amount of sight had already gone.

As a parent with young children, the diagnosis hit hard — not because it hurt, but because it hadn't. Glaucoma had been quietly taking her vision for years, and she'd had no way of knowing. What frightened her most was the thought of not being able to see her kids grow up. With prompt treatment, we've been able to stabilise her vision, but we can't give back what was lost before she came in.

I tell you her story because it captures the most important thing to understand about glaucoma: seeing well is not the same as having healthy eyes.

What is glaucoma?

Glaucoma is a group of conditions that damage the optic nerve, the cable carrying vision from your eye to your brain. It's usually, though not always, linked to raised pressure inside the eye. Crucially, the damage is permanent. We can halt it, but we cannot reverse it.

The difficulty is that the most common form causes no pain and no early symptoms. Your sharp central vision, the part you read and drive with, is the last to go. Everything can feel normal while the disease progresses at the edges. That's why glaucoma is often called the silent thief of sight, and it's why my patient had no idea anything was wrong.

Why early detection matters, and who's most at risk

Because the damage is silent and permanent, early detection is the whole game. A routine eye check can pick up the warning signs — raised pressure, subtle changes at the optic nerve, early gaps in the peripheral field — long before you would ever notice them. Found early, glaucoma is very manageable. Found late, we're working to protect whatever sight remains.

Two things raise your risk enough to be deliberate about checks. The first is age: risk climbs after 40. The second is family history. Glaucoma has a strong genetic link, so if a parent or sibling has been diagnosed, you should be screened — and if you've been diagnosed yourself, please tell your family to do the same.

How glaucoma is diagnosed at Re:Vision

If your optometrist sees something, or refers you as a glaucoma suspect, you'll have a thorough assessment. We take a careful history, including family history and any causes of secondary glaucoma, and we check your vision and eye pressure. We measure the thickness of your cornea (pachymetry), image the optic nerve, examine the eye's drainage system (gonioscopy), and map your peripheral vision (perimetry).

You'll be seen by a glaucoma fellowship-trained ophthalmologist — a sub-specialist in this area, and there are only around thirty-five of us across the country. If you do have glaucoma, we have the full range of tools to treat it, from laser through to minimally invasive surgery, so a diagnosis moves straight into a plan.

Can lifestyle help prevent glaucoma?

Lifestyle isn't a substitute for monitoring, but it supports your general eye health. Regular exercise, a balanced diet with plenty of leafy greens, and not smoking are all sensible steps. Think of them as complementary to regular checks, not a replacement for them.

Book a glaucoma check in Auckland

If you take one thing from my patient's story, let it be this: don't wait for symptoms, because with glaucoma they arrive too late to be useful. If you're over 40, have a family history, or simply haven't had your eyes checked in a while, book a check. It's a small, straightforward appointment that can protect your sight for the rest of your life.

To arrange a comprehensive eye check or a glaucoma assessment at Re:Vision in Auckland, get in touch with our team. If glaucoma is picked up, you'll be in the hands of a specialist from the very first appointment.

— Dr Divya Perumal