If you’re planning cataract surgery or considering refractive lens exchange, there’s a good chance you’ve already come across the term intraocular lens or IOL for short. And if you’re like most people I speak with, you probably have one big question on your mind:
“Which IOL will help me get out of glasses the most?”
It’s a perfectly reasonable question. After all, modern lens implants are incredibly advanced. Many can give you excellent distance vision without glasses, some can give you a helpful range for screens and everyday tasks, and a few are designed to minimise your dependency on reading glasses as well. But each one does this differently, and each comes with its own trade-offs.
In this guide, I want to walk you through the three main IOL categories monofocal, EDOF(extended depth of focus)and multifocal lenses so that by the time you finish reading, you’ll have a clear sense of which type best matches your lifestyle, your visual priorities and your appetite for compromise.
This is not a technical article full of jargon. I’m talking to you directly, as if we were sitting together before your consultation, going over your options one by one. My goal is to help you understand the practical difference between the lenses what it will actually feel like to live with them not just the science behind them.
And if, at any point, you want to learn more about the lens replacement process itself, you can find additional information onIOL surgery in Londonat the London Cataract Centre.
Understanding What “Getting Out of Glasses” Really Means
Before diving into the lens types, I want to make sure we’re speaking the same language. When people say they want to “get out of glasses”, they often mean different things. Here are the three most common goals:
1. Being glasses-free for distance
This includes activities like:
- Driving
- Watching TV
- Walking around the supermarket
- Seeing faces across the room
- Looking at scenery on holiday
Most lenses today do a good job with distance, but not all will handle other ranges.
2. Reducing glasses for screens and intermediate tasks
This covers anything at arm’s length, such as:
- Computer work
- Using a tablet
- Cooking
- Shopping
- Viewing the dashboard when driving
Your intermediate range is where you’ll likely spend a large portion of your day, especially if you’re still working.
3. Reducing dependence on glasses for close work
This is the closest focusing distance, used for activities like:
- Reading books
- Sewing or knitting
- Reading fine print
- Using your phone
- Doing hobbies that require detail work
Not all lenses give strong near vision, and the ones that do often come with compromises.
So, as you read about each lens type, keep these three vision ranges in mind. Your personal priorities will shape which IOL suits you best.
Monofocal IOLs: Maximum Clarity at One Distance
Let’s start with the simplest type of lens the monofocal IOL. This is the standard option offered in NHS cataract surgery and is still an excellent lens even with all the newer technology out there.
How Monofocal IOLs Work
A monofocal lens has a single, fixed focal point. In plain English, this means:
You get clear vision at one distance only.
Everything else will usually need glasses.
Most people choose to have monofocals set for distance vision, because this helps with driving, walking around, watching TV and everyday life.
What You Can Expect After Surgery
Distance Vision
If your eyes are otherwise healthy, distance vision with monofocal lenses is often superb. Many people see as well as they did in their twenties.
Intermediate Vision
This is where monofocals start to fall short. You’ll likely need glasses for:
- Computer work
- Cooking
- DIY
- Using the dashboard in the car
Near Vision
Monofocals do not provide natural close focus, so reading glasses become essential.
The Option of Monovision
If you’re keen to reduce your reliance on glasses, your surgeon may offer monovision:
- One eye set for distance
- The other set for near
Your brain blends the two images, giving a practical range of vision.
It’s not perfect some people struggle with depth perception or find the difference between the eyes distracting but it can reduce glasses significantly without the side effects of multifocals.
Advantages of Monofocal IOLs
- Excellent clarity and contrast
- Minimal side effects (haloes, glare)
- Most forgiving option in low light
- Ideal for people with retinal or corneal issues
Drawbacks
- Only one clear focal point
- Most people still need glasses for reading and screens
- Limited ability to reduce spectacles significantly unless using monovision
Who Monofocals Are Best For
Choose monofocals if:
- You value the sharpest, highest-quality vision
- You don’t mind wearing glasses for certain tasks
- You want the lowest risk of visual side effects
- You have eye conditions that make multifocals or EDOF lenses unsuitable
EDOF Lenses: A Balanced Middle Ground for Everyday Life
Now let’s look at the extended depth of focus (EDOF) lenses. These are one of the most popular modern options for people who want to reduce, but not necessarily eliminate, their glasses use.
An EDOF lens is designed to stretch your focus so you don’t just see clearly at one distance you get a continuous range from far to intermediate.
A good way to imagine it is this:
– A monofocal gives you one sharp point.
– An EDOF gives you a smooth curve.
You won’t get full reading vision from an EDOF lens alone, but many people find they only need glasses for smaller print.
How EDOF Lenses Work
Instead of splitting light into different focal points (as multifocals do), EDOF lenses extend the depth of field. This gives:
- Strong distance vision
- Very good intermediate vision
- Functional, though not perfect, near vision
What Daily Life Feels Like with EDOF Lenses
– Distance Vision
– Generally excellent.
– Intermediate Vision
This is where EDOF lenses shine. You’ll likely find:
- Computer work much easier
- Cooking, shopping and DIY more natural
- Everyday life feels “sharp enough” without constantly reaching for specs
Near Vision
This varies from person to person. Most people still need reading glasses for:
- Very small text
- Long reading sessions
- Detailed or delicate work
But many can manage:
- Using their phone for quick tasks
- Reading labels
- Using menus in good lighting
Side Effects
Because EDOF lenses manipulate light, some people notice:
- Mild haloes
- Mild glare
- Slightly reduced contrast in very low light
These are usually less noticeable than with multifocal lenses.
Advantages of EDOF Lenses
- Great day-to-day functional vision
- Very good for computer work
- Reduced dependence on glasses for many tasks
- Fewer side effects than multifocals
- Smooth, natural visual experience
Drawbacks
- Reading glasses still needed for small print
- Slight night-time visual artefacts for some people
- Not as strong for near work as multifocals
Who EDOF Lenses Are Best For
Choose EDOF if:
- You want to reduce glasses but don’t mind using readers occasionally
- You spend a lot of time at the computer
- You want fewer side effects than multifocal lenses
- You want good all-round functionality rather than perfect near vision
Multifocal Lenses: Maximum Reduction in Glasses Use
If your number-one goal is to avoid glasses as much as possible not just for distance, but for reading too then multifocal IOLs are the option designed to get you closest to total spectacle independence.
How Multifocal IOLs Work
These lenses split incoming light into multiple focal points:
- One for distance
- One for intermediate
- One for near
Your brain learns to select the correct image for the task you’re doing.
What You Can Expect After Surgery
Distance Vision
Usually very good, though may not match the contrast of a monofocal.
Intermediate Vision
Good for:
- Computer screens
- Shopping
- Using your phone at arm’s length
Near Vision
This is where multifocal lenses outperform both monofocals and EDOF lenses. You can expect:
- Reading books
- Sewing, knitting or crafting
- Fine detail
- Long reading sessions
All often without glasses.
Side Effects to Consider
Because multifocal lenses split light, side effects are more common:
- Haloes around lights
- Glare
- Starbursts
- Reduced contrast in low light
These effects usually improve over several months as your brain adapts, but they never disappear entirely for everyone.
Night driving is the most commonly reported challenge.
Advantages of Multifocal Lenses
- Maximum potential for glasses-free life
- Strong near vision without reading glasses
- Good overall range
Drawbacks
- More side effects than other lens types
- Not suitable for everyone (especially those with retinal issues)
- Adaptation period required
- Can be difficult in low-light environments
Who Multifocals Are Best For
Choose multifocals if:
- You want to avoid glasses as much as possible
- You do lots of close work or enjoy reading
- You’re comfortable accepting some visual artefacts
- You have healthy eyes with no complicating conditions
Which Lens Reduces Your Need for Glasses the Most?
Let’s summarise the three lens types based on how much they reduce glasses use for each distance.
1. Distance Vision
- Monofocal: Excellent
- EDOF: Excellent
- Multifocal: Very good
All three options generally give strong distance vision, though monofocals tend to offer the highest contrast.
2. Intermediate Vision (screens, cooking, shopping)
- Monofocal: Usually needs glasses
- EDOF: Very good
- Multifocal: Good
If you want the most natural intermediate range, EDOF is usually the standout.
3. Near Vision (reading, sewing, detail work)
- Monofocal: Requires glasses
- EDOF: Functional, but often still needs glasses
- Multifocal: Best option for glasses independence
Putting It All Together: Which IOL Reduces Glasses the Most?
If you want to be almost completely glasses-free:
Multifocal IOL
You’ll get the strongest near vision and the biggest reduction in glasses overall.
If you want great everyday vision with fewer side effects:
EDOF IOL
You’ll reduce glasses significantly especially for intermediate tasks but still need readers for small print.
If you prioritise clarity and minimal side effects over glasses freedom:
Monofocal IOL
You’ll have excellent distance vision but will need glasses for most near tasks.
Lifestyle Examples: What Might Work Best for You?
“I’m on the computer all day and only read occasionally.”
EDOF may feel like the perfect balance.
“I read a lot and want to avoid glasses as much as possible.”
Multifocal lenses will give you the strongest near vision.
“I don’t mind wearing glasses I just want the clearest vision possible.”
Choose monofocals, or monovision if you want fewer glasses.
“I like sewing and crafting, but I don’t want visual side effects.”
You might prefer EDOF with mini-monovision (a mild difference between eyes).
“I drive at night regularly.”
A monofocalor EDOF lens is generally safer.
What About Eye Conditions?
Your surgeon may recommend avoiding multifocal lenses if you have:
- Macular degeneration
- Diabetic retinopathy
- Significant dry eye
- Corneal irregularities
- Previous eye surgery (depending on details)
Why?
Because these conditions can reduce the quality of the retinal image. Multifocal lenses already divide light, so any reduction in retinal clarity is magnified.
In such cases, monofocal or EDOF lenses are usually more appropriate.
The Role of Accurate Measurements
Even the best IOL needs precise planning. Factors such as:
- corneal curvature
- lens position
- eye length
- astigmatism
all influence how glasses-free you’ll be after surgery.
Premium lenses also require very accurate biometry, which is one reason why choosing an experienced surgeon and a high-quality clinic makes such a difference.
Astigmatism: Don’t Forget This Part
If you have astigmatism, you may need a toric IOL a version of the lens that also corrects this curvature.
This is available in monofocal, EDOF and multifocal designs.
Correcting astigmatism properly is essential if you want:
- sharp distance vision
- minimal spectacles
- comfortable intermediate reading
If astigmatism isn’t corrected, even the best lens type won’t deliver its full potential.
Questions to Ask Yourself Before Choosing an IOL
Here are some helpful prompts to guide your decision:
- How important is it for me to be glasses-free after surgery?
- Do I mind wearing reading glasses for close tasks?
- Do I do lots of near work or reading?
- Do I drive at night often?
- Do I have any eye conditions?
- How sensitive am I to visual imperfections like haloes or glare?
- What distance is most important for my daily life near, intermediate or far?
Your answers will usually make your best choice clear.
Where to Learn More or Book a Consultation
If you’re exploring lens options as part of cataract treatment or refractive lens exchange, you may find it helpful to read more about IOL surgery in London at the London Cataract Centre.
FAQs:
1. Which IOL makes you the most glasses-free?
Multifocal IOLs generally offer the greatest chance of becoming glasses-independent because they provide distance, intermediate and near focus. They’re ideal for people who want to minimise spectacles for reading as well as daily tasks. However, they come with a higher likelihood of haloes and glare. Patients with healthy eyes usually adapt well. If near independence is the priority, multifocal lenses are the top choice.
2. Are EDOF lenses good enough to reduce reading-glasses use?
EDOF lenses provide excellent distance and intermediate range, and many patients can read larger text without glasses. However, most still need reading glasses for small print or prolonged reading. Their main advantage is fewer visual side effects compared with multifocals. They offer a natural, smooth visual experience. For everyday tasks like computer work, EDOF lenses shine.
3. Do monofocal lenses help reduce glasses use at all?
Monofocal lenses offer outstanding clarity at one distance, usually set for far vision. Most people still need glasses for intermediate and near tasks unless monovision is used. They provide the least visual side effects and the sharpest contrast. They are the safest option for those with other eye conditions. If crisp vision matters more than glasses freedom, monofocals are idea.
4. What is monovision, and does it reduce glasses use?
Monovision involves correcting one eye for distance and the other for near. The brain blends the two, giving a functional range of vision without needing multifocal optics. Many people enjoy significantly reduced glasses use, though some struggle with depth perception. A trial using contact lenses can help judge suitability. It’s a good compromise for those who dislike visual side effects.
5. Which IOL is best for someone who works on computers all day?
EDOF lenses are often the best match for heavy computer users. They provide strong intermediate focus, which is crucial for screens, dashboards and arm’s-length tasks. Distance vision also remains excellent, offering balance throughout daily life. You may still need glasses for fine print, but far less often. They also tend to cause fewer haloes than multifocals.
6. Are multifocal lenses difficult to adapt to?
Some people adapt quickly, while others take weeks or months to adjust. Multifocals split light, which can create haloes, glare or reduced contrast, especially at night. Over time, the brain learns which focal point to prioritise, improving comfort. Still, they’re not suitable for everyone, particularly those sensitive to visual imperfections. Proper counselling helps set realistic expectations.
7. Do IOLs work well if I have astigmatism?
Yes if you choose a toric version of the IOL. Toric lenses are available in monofocal, EDOF and multifocal designs, allowing astigmatism to be corrected during surgery. Proper correction is essential for clear distance vision and reducing dependence on glasses. Without correcting astigmatism, even premium lenses won’t reach their full potential. Accurate measurements are key.
8. Which lens is safest for night driving?
Monofocal lenses typically provide the most comfortable night-time vision because they offer the highest contrast and the lowest risk of haloes. EDOF lenses perform well too, with only mild night-time artefacts for most people. Multifocal lenses can cause noticeable haloes around headlights, especially early on. If night driving is essential, monofocal or EDOF is usually preferred.
9. Can I choose a multifocal lens if I have another eye condition?
Often, no. Multifocals require a healthy retina and stable cornea because they split light between multiple focal points. Conditions like macular degeneration, diabetic retinopathy or corneal irregularities can reduce clarity and worsen visual quality with multifocals. In these cases, monofocal or EDOF lenses are safer and more predictable. A detailed eye exam determines suitability.
10. What factors determine how glasses-free I’ll be after surgery?
Lens choice plays a major role, but accurate measurements and astigmatism correction are equally important. Eye length, corneal shape and lens positioning all influence results. Premium lenses require precise biometry for best performance. Your lifestyle and tolerance for visual side effects also guide the choice. A personalised assessment ensures the most glasses-free outcome.
Final Thoughts: Choosing the IOL That Truly Fits Your Life
Choosing the right IOL is one of the most important decisions you’ll make for your vision, and the good news is that there really isn’t a “wrong” choice. Modern lenses are exceptionally advanced, but each one is designed with a different lifestyle in mind. If your top priority is to minimise glasses as much as possible especially for reading and close work multifocal lenses typically offer the greatest level of independence. If you prefer a smooth, natural range of vision with fewer side effects, EDOF lenses provide an excellent balance. And if clarity, contrast and predictability are what matter most, monofocal lenses, with or without monovision, remain a superb and highly reliable option.
Ultimately, the best lens is the one that aligns with your own priorities and daily activities. When you understand how each option performs in real life not just on paper you’ll be well equipped to choose the lens that gives you the freedom, clarity and confidence you’re looking for. If you’re looking to IOL surgery in London, our specialist team at the London Cataract Centre is here to help. Your vision deserves the right choice, and we’re here to ensure you make it with confidence.
Reference:
1. Leyland, M. & Webers, C.A., 2003. Multifocal versus monofocal intraocular lenses in cataract surgery: a systematic review. Ophthalmology, 110(9), pp.1789–1798. Available at: https://pubmed.ncbi.nlm.nih.gov/13129879/
2. Barberá-Loustaunau, E. et al., 2025. Visual Results After Extended Depth-of-Focus Lens Implantation: A Recent Meta-Analysis. Journal of Clinical and Experimental Ophthalmology, 14(8), 2795. Available at: https://www.mdpi.com/2077-0383/14/8/2795
3. Comparative efficacy and safety of all kinds of intraocular lenses in presbyopiacorrecting cataract surgery: a systematic review and metaanalysis Li, J. et al. (2024). Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC11020619/ P
4. Effect of Prior LaserAssisted in Situ Keratomileusis on the Calibration Accuracy of Extended Depth of Focus Intraocular Lenses: A Direct Comparative Study Lin, I.-H., Chao, C.-C. & Chang, C.-K. (2025). Available at: https://www.mdpi.com/2075-4426/15/7/301
5. Tahhan, N. et al., 2022. Clinical outcomes of an extended depth-of-focus intraocular lens in patients with glaucoma. Journal of Cataract & Refractive Surgery. Available at: https://pubmed.ncbi.nlm.nih.gov/39592543/