By Jagrut Lallu — BOptom (Hons), MSc Specialty Lenses (Hons), FIAOMC. Therapeutic Optometrist & Contact Lens Specialist. Founder, New Zealand Eye Research Centre; Partner, Rose Optometry.
New Zealand has some of the highest UV levels in the world — our clear skies and low ozone mean UV exposure here is markedly higher than at equivalent latitudes in the northern hemisphere. If you wear prescription glasses, squinting through your ordinary pair all summer, or swapping to non-prescription sunglasses and losing your vision correction, are both poor answers. Prescription sunglasses fix the problem properly — but there are things worth knowing before you buy.
Your main options
Dedicated prescription sunglasses. Your prescription ground into a tinted, UV-blocking lens in a frame you choose. The best optical result and the option most people are happiest with long-term. Almost any frame we stock — from our sunglasses range to most optical frames — can take prescription sun lenses.
Polarised prescription lenses. Polarisation cuts reflected glare from water, roads and car bonnets. If you drive a lot, fish, boat or cycle, it is usually worth it. Two caveats we always mention: some phone and dashboard screens look odd through polarised lenses, and pilots should not use them.
Transitions (photochromic) lenses. One pair that darkens outdoors. Genuinely convenient, but be aware they do not darken fully inside a car (windscreens block the UV that triggers them), so dedicated sunglasses remain better for driving.
Tinted or sun clip options for some frames — a budget-conscious answer we can advise on case by case.
What actually matters in the lens
- UV protection is about the lens standard, not the darkness of the tint. A cheap, dark lens without proper UV filtering can be worse than no sunglasses — the darkness opens your pupil while UV streams in. Every sun lens we dispense blocks UVA and UVB to standard.
- Tint colour is preference and purpose — grey keeps colours true (driving), brown adds contrast (variable light, golf), green is a comfortable all-rounder.
- Fit determines real-world protection. A well-fitted wrap or a properly adjusted frame keeps stray light out of the sides. This is where buying online-only falls short — an unadjusted frame slides, sits crooked, and lets light in around the edges.
- Progressives work fine in sunglasses. Modern freeform sun lenses take progressive prescriptions well — useful for reading a menu outside or a chart on the water.
Why buy prescription sunglasses from an optometrist
Anyone can tint a lens. The difference is in the measuring and fitting: your pupil distances and heights measured for the actual frame on your actual face, the frame adjusted so it sits straight and stays put, and an honest steer on which frame shapes suit your prescription (high prescriptions and large wrap frames, for example, need careful lens design to avoid distortion at the edges).
At Rose Optometry in Hamilton we are independent and optometrist-owned — we fit prescription sun lenses to sunglasses from our range, to frames from our optical collection, and in many cases to frames you already own. ✔ Frames in stock — available NZ-wide from Rose Optometry, Hamilton.
Common questions
How much do prescription sunglasses cost in NZ? It depends on the frame and lens design — single vision sun lenses cost meaningfully less than polarised progressives. Bring or choose a frame and we will quote precisely before any work is done.
Can I use my existing sunglasses? Often yes — many quality sunglass frames can be re-glazed with prescription sun lenses. Bring them in and we will tell you honestly whether the frame is suitable.
Are polarised lenses worth it? For driving, water and outdoor work — usually yes. For everyday street wear — nice but not essential. We will advise for your use, not the highest invoice.
Do I need a current prescription? If your last eye exam was over two years ago (or your vision has changed), have your eyes tested first — sun lenses ground to an old prescription are a false economy. Book an eye exam in Hamilton →
The short version
NZ sun is harsh, and squinting through it with the wrong lenses is a daily tax on your eyes. Prescription sunglasses done properly — correct UV standard, the right tint for how you use them, measured and fitted to your face — are one of the most-used things we dispense.