When you’re preparing for cataract surgery, one of the most important decisions is which type of intraocular lens (IOL) will replace your cloudy natural lens. Optegra private patients can choose from a range of lenses designed to suit different lifestyles and visual needs.
This guide explains the key differences between monofocal and multifocal lenses, plus a look at monovision, to help you understand which option may work best for you.
Your consultant will talk through your hobbies, work and day-to-day activities at your consultation. The right choice may vary depending on whether you’re a keen reader, spend a lot of time driving, love outdoor sports or simply want to minimise your reliance on glasses.
Monofocal vs Multifocal Lenses: What’s the Difference?
Monofocal lenses are set to focus at one distance only, usually near or far. Multifocal lenses are designed to provide vision at a range of distances (near, intermediate and far) so many patients can reduce or even eliminate their dependence on glasses and/or contact lenses.
Monofocal Lenses
Monofocal lenses have a single focal point. They’re set for either near, or distance vision and cannot automatically adjust to different ranges. They’re the most widely used IOL and remain a reliable choice for many patients. NHS patients at Optegra will receive the high quality Johnson & Johnson 1 piece monofocal IOL.
Advantages of Monofocal Lenses
- Clear, sharp vision at one distance
Most people opt for distance vision, which improves activities such as driving, recognising faces or watching TV.
- Predictable and cost-effective
Monofocal lenses have been used successfully in cataract surgery for decades and deliver reliable results.
- Less maintenance
Once implanted, they work passively providing lifelong vision without adjustments.
Performs better in low light conditions compared to a multifocal lens.
Disadvantages of Monofocal Lenses
- Limited range of focus
Because they’re fixed for one distance, monofocal lenses don’t give clear vision at all ranges.
- Spectacle dependence
If your lens is set for distance vision you’ll still need glasses for reading, and vice versa.
- Depth perception
In patients trying monovision with monofocal lenses a period of adaptation is required.
Monovision with Monofocal Lenses
Monovision involves implanting one monofocal lens for near vision in one eye and one for distance in the other eye. This gives functional vision at both ranges without constantly switching glasses. Your consultant will test whether your brain adapts comfortably to this before surgery.
Advantages of Monovision
- Reduced dependence on glasses
One eye is optimised for near tasks, the other for distance.
- Greater flexibility
You can switch between near and distance tasks more easily, which can improve daily life.
- Well-established technique
It has been used successfully for many years in cataract surgery and refractive lens exchange.
Disadvantages of Monovision
- Reduced depth perception
Judging distances and catching moving objects can be more challenging initially .
- Adaptation period
Adjusting to different vision in each eye requires a period of adaptation .
- Night vision
Some people notice glare, halos or reduced contrast sensitivity in low light.
Multifocal Lenses
Multifocal lenses are designed with several optical zones to focus light from different distances onto the retina. Implanted in both eyes, they allow most people to see clearly up close, at intermediate distances and far away without glasses.
Advantages of Multifocal Lenses
- Reduced dependence on glasses
Clearer vision at multiple distances and enjoy activities such as reading, using a computer or watching TV without constantly reaching for glasses. Around 95% of patients no longer need glasses for everyday tasks after multifocal implantation.
- Convenience
Seamless transition between different tasks and activities without switching spectacles.
- Improved quality of life
Clearer vision at various distances makes everyday activities such as cooking, sport and gardening more enjoyable.
Potential Disadvantages of Multifocal Lenses
- Halos and glare
Some may report halos and glare at night and a period of neuroadaptation is required.
- Reduced contrast in dim light
Additional lighting in dim light conditions may be required, good light when reading prevents eye strain and is always encouraged.
- Occasional need for light readers
Some people may still require low-powered reading glasses for very fine print.
Making Your Decision
Choosing between monofocal, multifocal or monovision lenses depends on your lifestyle, vision goals and eye health. At your consultation, we’ll assess your prescription, discuss your hobbies and work, and guide you to the option that suits you best.
Book a free, no-obligation consultation with one of our expert surgeons to learn more about lens choices for cataract surgery.
By Author: Alastair Stuart
Dr Alastair Stuart is Medical Director at Optegra, and has extensive experience in both Laser eye surgery and Cataract Surgery.
Medically Reviewed Date: 3rd October 2025
