Here’s something many patients don’t realise until their optometrist mentions it: cataract surgery isn’t just about clearing away the cloudiness in your natural lens. It’s also a rare chance to reset your prescription and, depending on the lens you choose, meaningfully reduce how much you rely on glasses afterwards.
The lens that goes in during surgery is called an intraocular lens, or IOL. Picking the right one is arguably the biggest decision you’ll make in this whole process, bigger, in some ways, than choosing your surgeon.
Below is a rundown of the main categories of IOL available in Australia: what each one does, who tends to suit it, and where the trade-offs lie. By the end, you’ll have a solid grasp of the options before you even step into a consultation room. And once you’re there, your OKKO specialist will assess your eyes individually and recommend whichever option genuinely fits your vision and your life, not a generic answer.
What is an intraocular lens (IOL)?
Think of your eye’s natural lens like a camera lens that’s gradually fogged over. During cataract surgery, that clouded lens is removed and replaced with a new, clear artificial one: the IOL.
Unlike glasses or contacts, an IOL isn’t something you take out at night. It sits permanently inside your eye and is built to last a lifetime. Because it’s implanted at the time of surgery, your specialist can also select an IOL that corrects part or all of your existing prescription, which is why lens choice matters so much for your long-term vision.
There are several categories of IOL on the market, each suited to different needs and different levels of glasses independence. Let’s go through them one by one.
Monofocal IOLs (standard lenses)
A monofocal lens focuses light clearly at a single distance, almost always set for distance vision (so you can see clearly across a room or down the street). It’s the most widely used lens type in Australia.
Sticking with the camera analogy, a monofocal IOL is like a fixed-focus lens. It does one job very well. Most people who go this route will still need reading glasses for close-up tasks like books, phones and restaurant menus, and often for intermediate tasks such as computer screens too.
There’s also an option worth knowing about called blended vision, or monovision. One eye is set for distance, and the other for near, which can cut down on glasses use without stepping up to a premium lens. It doesn’t suit everyone: some people find it hard to adjust to each eye doing a different job, which is why a contact lens trial is often suggested first, so you can get a feel for it before committing.
Best for: those who don’t mind popping on reading glasses, care most about sharp distance vision, and want to spend less.
Key limitation: you’ll still reach for glasses when reading or doing close-up work.
Extended depth of focus (EDOF) lenses
EDOF lenses take a different approach. Rather than locking focus onto a single point, they stretch it into one longer, continuous zone, a bit like widening the sweet spot on a camera lens so more of what you’re looking at stays sharp.
Day to day, this means clear distance vision and useful middle-distance vision, for example, when checking the dashboard while driving, working at a computer, or reading a menu across the table. EDOF designs generally cause fewer halos and less glare at night than older multifocal lenses. Small print in low light can still be tricky, so quite a few EDOF patients still carry reading glasses.
At OKKO, EDOF lenses fall under our lifestyle cataract surgery category, since they’re a more advanced optical design.
Best for: active patients, regular drivers, people who spend a lot of time on screens, and those with outdoor or on-the-go lifestyles.
Key limitation: you may still need reading glasses for fine print in low light.
Multifocal and trifocal IOLs
Multifocal lenses go a step further again. Using concentric rings or distinct optical segments, they split incoming light across multiple focal zones at once, giving you distance, intermediate and near vision essentially simultaneously. Multifocal lenses are a more refined design that adds a dedicated intermediate focal point, closing the gap between near and far.
These are the lenses with the greatest potential for full glasses independence, and for many patients, that’s genuinely life-changing.
Not everyone is a suitable candidate for a multifocal lens, either. Your OKKO specialist will look closely at your corneal health, pupil size and overall lifestyle before recommending one, because getting this choice wrong is harder to undo than switching glasses.
Best for: patients who strongly want to minimise glasses use across all distances, including reading.
Key limitation: potential for halos and glare at night; requires an adaptation period; not suitable for every eye; the highest additional cost among lens categories.
Toric IOLs for astigmatism
Astigmatism happens when your cornea or natural lens has an irregular, football-shaped curve rather than a perfectly round one. It’s extremely common and, left uncorrected, causes blurred or distorted vision at every distance, not just up close or far away.
A toric IOL is specifically shaped to correct this irregularity at the same time your cataract is removed. It’s worth understanding that toric technology isn’t its own separate category of vision correction; it’s a design feature that can be added to monofocal, EDOF or multifocal lenses alike.
For patients with moderate to significant astigmatism, choosing a toric lens over a standard one can make a real difference to unaided vision quality after surgery. Leaving significant astigmatism uncorrected, even with an otherwise excellent lens, tends to leave vision softer than it needs to be.
Best for: patients with moderate to significant astigmatism, as measured during pre-operative assessment.
Note: not every patient needs a toric lens. Your specialist will measure your corneal curvature carefully before surgery to work out whether astigmatism correction is worthwhile for you.
Lens options at a glance
- Monofocal: one fixed focus point, set for distance. You’ll likely still need glasses up close. Medicare covers it, with no extra fee.
- EDOF: good distance and intermediate vision, with fewer halos than multifocal options. Fine print may still call for glasses, and there’s an extra cost.
- Multifocal/trifocal: greatest potential for glasses independence at all distances, possible night-time halos and an adaptation period, highest additional cost.
- Toric (add-on feature): corrects astigmatism, available with monofocal, EDOF or multifocal lenses, recommended when corneal measurements show significant astigmatism.
How OKKO helps you choose the right lens
There’s no shortcut to choosing the right IOL, and there’s certainly no single lens that’s objectively “best”. The right choice is always individual, based on a combination of factors your specialist assesses in detail.
At your OKKO consultation, this includes:
- Detailed biometric scans and eye measurements, including corneal curvature, eye length and pupil size.
- Your prescription and any existing eye conditions, such as astigmatism, dry eye or early macular changes, all of which can influence which lenses are suitable.
- Your lifestyle, including whether you drive at night, spend long hours on screens, or read constantly.
- Your personal tolerance for glasses, some patients are perfectly happy with reading glasses, others want to be rid of them entirely.
Your OKKO specialist will talk through every relevant option with you, explain the reasoning behind their recommendation, and answer whatever questions come up. There’s no pressure to choose a premium lens if a standard one suits your life better, and equally, no reason to settle for less if a lifestyle lens would genuinely serve you better.
If you’d like to look into your options further, visit our cataract surgery page or book a consultation to discuss your eyes specifically.
Frequently asked questions
What is the best lens for cataract surgery in Australia?
There is no single best lens. The right intraocular lens depends on your lifestyle, vision goals and eye health. Monofocal lenses suit patients happy to wear reading glasses and carry the lowest out-of-pocket cost, while EDOF and multifocal lenses reduce glasses dependence but cost more and may cause halos for some patients. Your OKKO specialist will assess your eyes and lifestyle to recommend the most suitable option.
How is a multifocal cataract lens different from a monofocal one?
A monofocal lens is set to focus sharply at one distance, almost always distance vision, so you’ll still want reading glasses for anything close up. A multifocal lens spreads that focus across several zones instead, covering distance, intermediate and near vision in a single lens, which means relying on glasses far less often. The catch is a higher price tag, and it’s common to notice some halos around lights at night while your eyes settle in.
Will I still need glasses once I’ve had cataract surgery?
This depends on the lens used during your cataract surgery. With a standard monofocal lens, most people still need reading glasses for close-up tasks. With an EDOF or multifocal lens, many people rely on glasses much less, though no lens can guarantee complete freedom from glasses for everyone.
Can cataract surgery correct astigmatism?
Yes. Toric intraocular lenses correct astigmatism at the same time the cataract is removed. If your astigmatism is significant, choosing a toric lens over a standard one can noticeably sharpen your unaided vision. Your OKKO specialist will measure your cornea before surgery to determine whether a toric lens is appropriate for you.
What is an EDOF lens for cataract surgery?
An Extended Depth of Focus (EDOF) lens uses a continuous range of focal power to provide clear distance and intermediate vision, with fewer optical side effects such as halos compared to traditional multifocal lenses. Most EDOF patients can drive, use computers and manage most daily activities without glasses, although fine-print reading glasses may still be needed.
Why choose OKKO Eye Specialist Centre for cataract surgery in Brisbane
At OKKO Eye Specialist Centre, our team of experienced ophthalmologists brings subspecialty expertise in cataract and refractive surgery, consulting from our Auchenflower and Upper Mt Gravatt locations. Our specialists offer the full range of intraocular lens options, including standard monofocal, toric, EDOF and multifocal lenses, and take the time to match each patient with the option best suited to their individual lifestyle and visual goals.
Dr Matthew Russell (MBChB, FRANZCO) has over 20 years’ experience as a specialist ophthalmologist, with subspecialty training in cataract and refractive surgery. He performs cataract surgery using the full range of IOLs, including EDOF and multifocal lenses.
Dr Eve Hsing is a comprehensive ophthalmologist with a particular interest in medical retinal conditions and cataract surgery.
Dr Delia Wang is an ophthalmologist who trained in oculoplastics, medical retina and ophthalmic surgery.
To book a consultation and discuss which IOL is right for you, call 07 3725 0222 or visit okko.com.au/contact.
Disclaimer
All information is general in nature and is not intended to be a substitute for professional medical advice. Lens suitability varies between individuals and can only be determined following a thorough eye examination. Please consult your ophthalmologist or GP for personalised medical advice.
Further reading
- Cataract surgery at OKKO Eye Specialist Centre
- Your specialists’ fees: cataract surgery fee guide
- Which type of cataract surgery might be suitable for you?
- How much does cataract surgery cost in Brisbane?
Medical references
- Healthdirect Australia, Cataract surgery
- Royal Australian and New Zealand College of Ophthalmologists (RANZCO), Patient information sheets
- Therapeutic Goods Administration, Intraocular lenses regulation
- Cleveland Clinic, Intraocular lens (IOL) implants
- American Academy of Ophthalmology, IOL implants for cataract surgery
