Standard Monofocal Lens
A monofocal lens is the standard lens fitted during cataract surgery, giving clear vision at one distance, usually chosen for distance vision, with reading glasses typically still needed.
What is a monofocal lens?
A monofocal lens is an artificial lens fitted during cataract surgery. It replaces your eye’s cloudy natural lens. “Mono” means one, and “focal” means focus point, so a monofocal lens focuses light clearly at a single distance.
Most patients choose a monofocal lens set for distance vision. This means:
- Distance vision, such as driving or watching TV, is usually clear without glasses
- Reading and close-up tasks usually still need glasses
- The lens is fixed, it doesn’t adjust focus the way a young, natural eye does
A monofocal lens is the lens most commonly used in cataract surgery worldwide, including on the NHS. According to NHS guidance on cataract surgery, the operation itself typically takes between 20 and 45 minutes, whichever lens type is chosen.
How does monofocal lens cataract surgery work?
The procedure is the same regardless of lens type. Only the lens itself differs. Here’s what happens, step by step:
- You’re given eye drops to numb the eye and widen the pupil
- A tiny incision is made at the edge of the cornea
- The cloudy natural lens is broken up and removed, usually using ultrasound (a technique called phacoemulsification)
- The monofocal lens is folded, inserted through the same small incision, and unfolded into place
- No stitches are usually needed, the incision heals on its own
The whole procedure is done under local anaesthetic. You’re awake, but the eye is completely numbed. You go home the same day.
Who is a monofocal lens suitable for?
A monofocal lens suits most people having cataract surgery. It tends to be a good fit if you:
- Already wear glasses for reading or fine detail, and don’t mind continuing to do so
- Want the most predictable, well-established lens option
- Have straightforward astigmatism, or none at all
- Prefer to keep the cost of surgery to the standard guide price, since a monofocal lens is included as standard rather than priced as an upgrade
It’s a well-studied option with decades of clinical use behind it. A large 2024 network meta-analysis comparing monofocal, extended depth of focus (EDOF), enhanced monofocal and trifocal lenses, published in Frontiers in Medicine and indexed on PubMed Central, confirmed that newer lens designs give better near vision without glasses. But it also found monofocal lenses remain a reliable choice for sharp, dependable distance vision. Newer isn’t automatically better for every patient, it depends on what matters most to you.
What is recovery like after monofocal lens surgery?
Recovery is usually straightforward. In the days after surgery, you can expect:
- Some blurring at first, mostly from the dilating drops
- Mild grittiness or discomfort in the treated eye
- Gradually improving vision over the following days
- Eye drops to prevent infection and reduce inflammation, usually for a few weeks
You’ll have a follow-up appointment to check healing and confirm your final glasses prescription. Many patients need new reading glasses even if their distance vision no longer needs correcting.
If you have both eyes affected, they’re treated on separate visits, usually a few weeks apart, so the first eye can heal before the second procedure.
01
Consultation
Assessment & confirm lens choice
02
Surgery
Monofocal lens implantation
03
Aftercare
Drops, follow-up & glasses prescription if needed
Considering a monofocal lens for cataract surgery?
Guide Price
from £2,950
Per eye, including lens implant, theatre and aftercare. See the pricing page for all options.
At a glance
Anaesthetic
Local
Procedure time
~20 min / eye
Stay
Day case
Recovery
A few days
Both eyes
Separate visits