Myopia Control Contact Lenses in NZ: Why Breathability Matters for Kids
30th Jun 2026
If your child's optometrist has just mentioned "myopia control," you've probably got two questions running at once: does this actually work, and is it safe for my kid to wear contact lenses every day? The second question comes down to a property most parents have never heard of — how much oxygen a lens actually lets through, often called its breathability — and it's become a lot more relevant in New Zealand since a new lens landed here in early 2026.
A note before you read on: This article is general information, not medical advice, and it isn't a substitute for an eye exam. Every child's eyes, prescription, and suitability for myopia control are different — please check with your own optometrist before starting, switching, or stopping any contact lens or treatment for your child.
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How Common Is Myopia in New Zealand Kids, Really?
Myopia is more common than many parents realise — and New Zealand doesn't actually track how common it is in children specifically. There's no national programme that follows kids' eyesight over time the way some countries do. The closest thing we have to NZ-specific data is a 2025 University of Auckland study, which found that around 22% of New Zealanders aged 25 to 44 have needed correction for short-sightedness since at least 2001 — a rate that's barely moved in over two decades. It's solid evidence that myopia is common and stable in that age group here, even though it can't tell us the rate specifically in kids.
What we do have is a clearer picture of parent awareness and diagnosis trends. An industry-commissioned YouGov survey reported by trade publication NZ Optics found that New Zealand parents are now more likely to report a child's myopia diagnosis than they were a few years ago (21% versus 15% previously), yet 58% of parents surveyed didn't actually know that "myopia" means short-sightedness in the first place. That's a trend in diagnosis and awareness, not a clinical prevalence rate — but it tells a clear story: more kids are being diagnosed, while plenty of parents are navigating this without really knowing what the word means.
It's also worth understanding why eye care professionals now talk about "myopia control" rather than just "correcting" short-sightedness. As a child's eye grows too long (axially), the degree of myopia tends to increase year on year — and higher levels of myopia carry a higher lifetime risk of complications like retinal detachment later in life. Myopia control is slowing that growth down while the child is still young enough for it to matter.
What Does "Myopia Control" Actually Mean?
Standard contact lenses and glasses correct blurry vision, but do nothing to influence how fast a child's prescription worsens. Myopia control lenses use different optical designs to try to slow that down — and there's more than one path.
MiSight 1 day (CooperVision) — dual-focus design Uses a "dual-focus" design, branded ActivControl Technology, that creates two treatment zones so light focuses slightly in front of the peripheral retina rather than directly on it (known as myopic defocus). The theory, backed by multi-year clinical trial data, is that this signals the eye to slow its growth. Among soft contact lens approaches, MiSight has the longest continuous published clinical trial history. See CooperVision NZ's MiSight 1 day page for the manufacturer's own information.
MiSight is automatically the right choice for every child — your optometrist will weigh up fit, comfort, and your child's specific eyes.
Off-label multifocal lenses (e.g. Biofinity Multifocal) — a presbyopia lens, repurposed. There's also a path worth knowing about, mostly so you're not confused if your optometrist mentions it: some standard multifocal contact lenses, originally designed for presbyopia (the age-related loss of near focus in adults), use a similar optical principle and have been studied for myopia control too. The best evidence here comes from the BLINK study, a US National Eye Institute-funded trial published in JAMA, which tested CooperVision's Biofinity Multifocal in children aged 7 to 11. The high-add version (+2.50D) slowed myopia progression by 43% and axial elongation by 36% over three years compared with single-vision lenses — a real effect, though smaller than MiSight's reported figures. The lower-add version tested in the same trial (+1.50D) showed no significant benefit at all. This use is considered "off-label" — Biofinity Multifocal is regulatory-approved for presbyopia, not pediatric myopia control, and CooperVision doesn't market or endorse it for this purpose. The parameters matter a lot, as the trial itself showed, so this genuinely isn't something to self-select; it's a decision for your optometrist to make deliberately, not a DIY substitute for a purpose-built lens.
MyDay MiSight 1 Day: What's New in NZ
This is the part that's genuinely new. CooperVision launched MyDay MiSight 1 day in Australia and New Zealand in March 2026, combining the same ActivControl optical design used in the original MiSight 1 day with the silicone hydrogel material from its MyDay daily disposable range. The headline change is breathability: the new lens has an oxygen transmissibility (Dk/t) of 100, compared with 28 for the original MiSight 1 day — CooperVision describes this as up to four times the oxygen transmissibility of traditional hydrogel materials — and it adds a built-in UV inhibitor that the original lens didn't have.
The original MiSight 1 day has a well-documented track record overseas. It received US FDA approval in 2019 as the first contact lens shown to slow myopia progression in children, based on a multi-year clinical trial in children aged 8 to 12 at the start of treatment, with published results showing roughly 59% slower progression (by spherical equivalent) and 52% less eye elongation over three years compared with a standard single-vision lens. That trial used the original material — omafilcon A, a conventional hydrogel — which is exactly why its oxygen transmissibility sat at a comparatively low 28 Dk/t. The new MyDay MiSight 1 day keeps the same optical approach but swaps in a modern silicone hydrogel material, which is where the breathability jump comes from.
MyDay MiSight specifically isn't available yet in our product range, as it's a speciality lens that's fitted directly by an optometrist as part of a managed myopia control programme. If your child has been prescribed it, your fitting optometrist is the right place to source it.
Breathability 101: Dk vs Dk/t, and Why It Matters More for a Kid's Eyes
The cornea has no blood vessels, so it gets its oxygen almost entirely through the tear film and whatever sits on top of it. Two related numbers describe how well a contact lens lets that oxygen through:
Dk (oxygen permeability) is a property of the raw lens material — how easily oxygen diffuses through it, independent of how the lens is actually cut.
Dk/t (oxygen transmissibility) is what matters in practice: Dk divided by the lens's actual thickness. It's the number that describes the real lens sitting on a real eye, and it's the figure used throughout this article — so strictly speaking, "100 Dk/t" describes a lens's transmissibility, not its permeability, even though the two get used interchangeably in everyday conversation.
For daily wear, a Dk/t of roughly 24 is generally considered the threshold for avoiding central corneal swelling during the day. Both the original MiSight (28 Dk/t) and the new MyDay MiSight (100 Dk/t) clear that bar — but the gap between them matters more for kids than it might for an adult wearer, for a simple reason: myopia control lenses are typically worn daily for years, not months, starting from a young age. A child is also less likely than an adult to clearly articulate "my eyes feel dry and irritated by 3pm," so a wider safety margin on oxygen flow is a sensible thing to want built into the lens itself, rather than relying on a kid to self-report subtle symptoms.
It's worth being clear about what Dk/t doesn't tell you, though: a higher number is a genuine advantage, but it isn't the whole safety picture. Fit, hygiene, the prescribed wearing schedule, how well a child can handle inserting and removing lenses, regular optometrist follow-up, and the health of the eye itself all matter just as much. A high-Dk/t lens worn too long, handled poorly, or never followed up on isn't automatically safer than a lower-Dk/t lens that's properly fitted and monitored.
Dk/t at a glance (for a −3.00D lens, as published by manufacturers — higher means more oxygen reaches the cornea):
Swipe left/right to see the full table on mobile.
| Lens | Dk/t |
|---|---|
| Daily-wear minimum | 24 |
| Original MiSight 1 day | 28 |
| MyDay MiSight 1 day | 100 |
| Acuvue Oasys 1-Day* | 121 |
*Acuvue Oasys 1-Day is an everyday daily disposable, not a myopia control lens — included only as a reference point for what a high-oxygen silicone hydrogel lens looks like.
NZ's Sun, Screens, and Myopia: A Local Twist
New Zealand has its own particular wrinkle in this story. According to NIWA data collated by Environmental Health Indicators NZ, summer UV levels in New Zealand are higher than at equivalent latitudes in the northern hemisphere, and the country's population combined with its strong outdoor culture are both cited as reasons UV-related eye and skin conditions run high here.
At the same time, the same industry-commissioned survey reported by NZ Optics quoted a founding member of the Australia and New Zealand Child Myopia Working Group making the case for "more green time, less screen time" — pointing to evidence that time spent outdoors appears to have a protective effect against myopia developing in the first place.
Put those two things together and you get a genuinely Kiwi balancing act: the outdoor time that's good for preventing myopia is also serious UV exposure. That's part of why the built-in UV inhibitor in the new MyDay MiSight is a relevant detail, not just a marketing line. One important caveat, straight from the manufacturers' own product information: a UV-blocking contact lens is not a substitute for sunglasses or a wide-brimmed hat, because it only covers the cornea and doesn't shield the rest of the eye or the surrounding skin — it's a helpful extra layer, not a replacement for normal sun protection. If your child also plays sport and wears (or is considering) contact lenses for it, our guide to the best contact lenses for sports in New Zealand covers some of the same active-lifestyle territory.
What to Ask Your Optometrist
If myopia control has come up for your child, a few specific questions go a long way:
- What are the myopia control options available for my child specifically — lenses, specialty spectacle lenses, or low-dose atropine drops — and why is this one being recommended?
- Is the lens you're suggesting purpose-built and approved for myopia control, or is it an off-label use of a lens designed for something else (like presbyopia)?
- What's the Dk/t of the lens you're proposing, and how does that compare with a standard daily lens?
- How has my child's prescription changed over the last year, and what progression rate are we trying to slow?
- What's the review schedule — myopia control isn't a one-off fitting, it needs regular check-ins to track how well it's working.
Getting Your Child's Eyes Checked in NZ
Every four-year-old in New Zealand is entitled to a free health and development check through Te Whatu Ora's B4 School Check, part of the Well Child Tamariki Ora schedule, which includes a vision and hearing check. It's a good first catch-all — but it's a one-off screening check, not the same thing as ongoing, optometrist-led myopia monitoring. If myopia control is being considered, that requires its own dedicated optometrist visits and regular follow-up, separate from the B4 School Check.
If your child is moving from glasses into contact lenses for the first time, it's worth knowing that a glasses prescription and a contact lens prescription aren't interchangeable — different measurements are involved, which we cover in Stop Right There: Your Eyeglasses Script Won't Work for Contact Lenses. And if you're handed a contact lens script covered in unfamiliar codes, Contact Lens Prescriptions Explained decodes it line by line.
FAQ
Can ordinary multifocal contact lenses (made for presbyopia) be used for myopia control?
Sometimes, off-label — a US National Eye Institute-funded trial (the BLINK study) found a high-add version of CooperVision's Biofinity Multifocal slowed myopia progression in children, but a lower-add version of the same lens showed no benefit at all. These lenses aren't approved or marketed for pediatric myopia control, so this is a decision for your optometrist to make deliberately, not something to choose yourself.
Is MyDay MiSight the only myopia control contact lens available in New Zealand?
No. Johnson & Johnson's Acuvue Abiliti 1-Day is also available here, using a different optical design (RingBoost rather than dual-focus) to work toward the same goal of slowing myopia progression. Neither is currently listed in our online catalogue, as both are specialty lenses fitted directly by an optometrist — your optometrist can advise which design, if any, suits your child best.
Is MyDay MiSight 1 day available in New Zealand?
Yes — CooperVision launched MyDay MiSight 1 day in Australia and New Zealand in March 2026. It's fitted directly through optometrists as part of a managed myopia control programme rather than sold as a general over-the-counter daily lens.
What's the difference between MiSight 1 day and MyDay MiSight 1 day?
Both use the same dual-focus ActivControl optical design. The difference is the lens material: the original uses a hydrogel material rated at 28 Dk/t, while the newer MyDay-based version uses a silicone hydrogel material rated at 100 Dk/t and adds a built-in UV inhibitor.
What does Dk/t mean, and why does it matter for a child's contact lens?
Dk/t (oxygen transmissibility) measures how much oxygen actually passes through a specific lens to reach the cornea. Higher Dk/t generally means a lower risk of oxygen-related irritation or swelling — which matters more for kids because myopia control lenses are typically worn daily for years.
At what age can a child start myopia control contact lenses?
The original MiSight 1 day's clinical trials and US FDA approval covered children aged 8 to 12 at the start of treatment. The right age for any individual child is ultimately a decision for their optometrist, based on their eye health, prescription, and ability to handle daily lens wear.
Does spending time outdoors really help prevent myopia?
Evidence cited by people involved with the Australia and New Zealand Child Myopia Working Group suggests that time spent outdoors has a protective effect against myopia developing. In New Zealand specifically, that outdoor time also comes with higher-than-average UV exposure, which is worth balancing with appropriate eye protection.
Sources used in this article: Xu, Collins & Phillips (University of Auckland School of Optometry and Vision Science), "Stable myopia prevalence in New Zealand from 2001 to 2023 estimated from national driver licence data on unaided visual acuity" (linked inline above); NZ Optics trade publication reporting on the industry-commissioned Australia and New Zealand Child Myopia Working Group survey (linked inline); CooperVision New Zealand's own MiSight 1 day and MyDay MiSight 1 day product pages (linked inline); Acuvue New Zealand's Abiliti 1-Day product page (linked inline); Insight (Australian/NZ ophthalmic trade publication) reporting on the March 2026 MyDay MiSight 1 day launch (linked inline); the American Optometric Association on the original MiSight 1 day's 2019 FDA approval (linked inline); the BLINK study (Walline et al., JAMA, US National Eye Institute-funded randomised trial), via the NIH's own press release (linked inline); Environmental Health Indicators New Zealand (NIWA UV data, linked inline); Te Whatu Ora's B4 School Check programme information (linked inline).