The short answer
A standard monofocal lens gives clear sight at one distance, usually far, and most people then wear reading glasses. A toric lens also corrects astigmatism, so distance sight can be sharper without glasses. A multifocal lens aims to give both near and far sight with less need for glasses, but it can cause halos and glare at night and does not suit every eye. A monofocal lens is the standard and gives excellent results for most people.
Book cataract surgery, from ₦420,000Medically reviewed by Dr Debo Odulana, Founder and Chief Executive, Mezo. Last reviewed . This page is general information, not a diagnosis. Care is decided with you after an examination.
Monofocal: the standard lens
A monofocal lens is set for one distance. Most people choose distance, so they see well for walking, driving and television, and wear glasses for reading and the phone. Some choose near instead and wear glasses for distance. It is the lens used in most cataract operations worldwide, it gives the clearest image at its set distance, and it is the lens included in the standard price on Mezo.
A few people choose monovision: one eye set for distance, the other for near. It suits some, especially people who had it with contact lenses, and bothers others. Ask your surgeon before choosing it.
Toric: if you have astigmatism
Astigmatism means the front of the eye is shaped more like a rugby ball than a football, which blurs sight at every distance. If your measurements show a meaningful amount, a toric lens corrects it. Without one, you would still need glasses with an astigmatism correction for sharp distance sight. A toric lens must sit at the right angle in the eye, so precise measurement and placement matter.
Multifocal and extended range: less need for glasses
These lenses split or stretch the focus so you can see at more than one distance. Many people who choose them use glasses less. The trade-offs are real:
- Halos and glare around lights at night, which can be a problem for night driving
- Slightly less crisp contrast than a monofocal lens
- They are not advised for eyes with other disease, such as macular problems, advanced glaucoma or diabetic changes at the back of the eye
- They cost more and are usually not covered by HMO plans
Questions that help you decide
- Do I mind wearing reading glasses?
- How much do I drive at night?
- Is my eye otherwise healthy enough for a premium lens?
- How much astigmatism do I have, and would a toric lens change my result?
- What exactly is included in the price for each lens?
What it costs on Mezo
Standard monofocal lens, biometry and both post-operative reviews included.
Common questions
Can I change the lens later if I do not like it?
Lens exchange is possible but it is a further operation with its own risks, so it is done only when really needed. It is far better to choose carefully at the start.
Does my HMO pay for a toric or multifocal lens?
Most plans that cover cataract surgery cover a standard lens only. A premium lens upgrade is usually quoted to you as cash on top. The desk files prior authorisation for the covered part.
Will I need glasses at all after cataract surgery?
With a standard lens most people need glasses for reading. With a toric or multifocal lens many need them less. Nobody can promise you will never need glasses.
Does the lens wear out?
No. The artificial lens is designed to last for life. Some people later get clouding of the membrane behind it, which a quick laser clears.
The procedures
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Get one written price for your cataract operation
Tell us the operation and whether you will pay cash or through your HMO. Asking is free. A coordinator calls you back, and the written all-in quote follows the surgeon's assessment, so you know the full price before you commit.
Get a fixed surgery quoteSources and further reading
The guidelines and patient information this page is checked against. Care in Nigeria follows the same evidence; what differs is the price and where it is done.
- IOL implants: lens replacement after cataracts. American Academy of Ophthalmology. Patient information.
- Cataracts in adults: management. National Institute for Health and Care Excellence (NICE). Clinical guideline.
- Astigmatism. NHS. Patient information.
Links last checked 23 October 2026.
Medical disclaimer: This guide is general information and does not replace advice from your own doctor. Where your centre's instructions differ from this guide, follow theirs.