What are multifocal IOLs?
If you are considering cataract surgery or lens replacement, you may have heard about multifocal intraocular lenses (IOLs). But what exactly are they? And could they be the right choice for you?
Here’s everything you need to know about multifocal IOLs, explained in simple terms.
What Is an IOL?
An intraocular lens (IOL) is an artificial lens implanted in your eye during cataract surgery or lens replacement. It replaces the natural lens that has become cloudy or is no longer focusing properly.
There are different types of IOLs, and each type helps you see differently after surgery. The standard option is a monofocal IOL, which corrects vision at one distance (usually far). But if you want to see at multiple distances without glasses, a multifocal IOL may be a better fit.
What makes a multifocal IOL different?
Multifocal IOLs are designed with special zones set at different focusing distances. This means that the lens can split incoming light, helping you see clearly at near, intermediate, and far distances.
You could think of it like varifocal glasses—except the lens is implanted inside your eye, and you don’t need to switch between different pairs of glasses.
How do multifocal lenses work?
The lens has concentric rings or sections built into its structure. These zones allow your brain to pick the clearest image depending on what you're looking at.
- Far vision: Driving, watching TV
- Intermediate vision: Using a computer, reading a menu at a restaurant
- Near vision: Reading, using a mobile phone
Your brain adjusts naturally to focus at the right distance over time and this is called neuroadaptation.
What are the benefits of multifocal IOLs?
- Reduce or eliminate the need for glasses after surgery
- See clearly at multiple distances
- Improve quality of life by offering more visual freedom
- Ideal for active lifestyles, frequent travellers, or anyone who wants fewer limitations
Are there any drawbacks?
Multifocal IOLs can cause some side effects, including:
- Haloes or glare around lights, especially at night
- Reduced contrast sensitivity, meaning vision in dim light might be slightly less sharp
However, many people adapt well and find these minor compared to the freedom from glasses.
Who is a good candidate for multifocal IOLs?
Multifocal lenses are best for people who:
- Want to minimise their need for glasses
- Have healthy eyes apart from cataracts or presbyopia
- Are willing to adapt to minor visual changes as their brain adjusts
A detailed assessment at Sharmina Khan Eye Clinic can help determine if a multifocal lens is right for you.
Final Thoughts
Multifocal IOLs offer the chance to see clearly at different distances without relying heavily on glasses. They’re a popular choice for patients who want more freedom and flexibility after cataract or lens replacement surgery.
Curious if you’re a good match? Start by taking our quick suitability self-test.
Are you suitable for vision treatments?
They aren’t suitable for everyone.
Find out if you could benefit from this life-changing surgery by taking the quick self-suitability quiz below:
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“Miss Khan was very professional, and both my eyes had trifocal intra-ocular lens implants (toric in the left). The risks and benefits were explained to my satisfaction, and I was very nervous. However, the procedure and the recovery were painless. I now have perfect unaided vision in both eyes and would recommend Miss Khan, 10 out of 10.”
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Sharmina Khan
MBBS(Lond) MSc FHEA FRCOphth DipCRS CertLRS, Consultant Eye Surgeon
Hi, I’m Sharmina Khan
I am a specialist Cataract & Lens Consultant Surgeon based in London.
I have carried out over 7000+ cataract/lens procedures in the last 10 years across both my private and NHS practices.
In my private clinic I offer my clients bespoke Premium Cataract Care Pathways. There are options so that you can achieve your dreams of better vision and more, according to your lifestyle needs.
