Refractive lens exchange replaces your natural lens with an artificial one before a cataract forms, to cut down on glasses or contact lenses. It is the same operation as cataract surgery. Mr Arthur Okonkwo performs it in Leeds, usually for people whose reading sight has started to fade, as a same-day procedure of roughly 20 minutes an eye.
His practice is at St James Laser Vision Clinic, and all his procedures are on the treatments page. It mainly suits people over 50 whose prescription is beyond the usual range for laser eye surgery. Some people in their mid-forties with failing near sight also consider it, usually as a private, not NHS, treatment.
Considering Refractive Lens Exchange?
Book a lens exchange consultation with Mr Arthur Okonkwo to discuss whether lens replacement is right for you.
Prefer to call? 0113 460 1923, Monday to Friday, 9am to 5pm
What Is Refractive Lens Exchange?
Your eye’s natural lens sits behind the pupil and supplies about a third of its focusing power, and with age it stiffens, which is why small print gets harder to read after 40. A lens implant is like building your glasses into your eyes.
Small self-sealing openings are made at the edge of the cornea. A circular window is opened in the lens capsule, a vibrating probe liquefies and removes the lens, and a folded implant then opens out inside the capsule. Lens surgery also means you will not need cataract surgery later in life.
Symptoms That Lead People to Ask, and Urgent Signs After Surgery
Most people come to the Leeds clinic because near work is becoming a strain. Long sight brings blurred close-up print, tired eyes and headaches, often after 40, while the warning signs after surgery are different.
| Your symptom | Possible cause | What to do |
|---|---|---|
| Holding menus and phones further away to read | Age-related loss of reading focus | Book an assessment |
| Halos or starbursts around lights after surgery | Expected light scatter | Mention it at review; it usually improves |
| Increasing ache, redness or blur after surgery | Infection or inflammation | Contact the eye team or eye casualty now |
| Sudden floaters, flashes or a spreading shadow | Retinal detachment | NHS 111 or the eye team the same day |
Flashes can appear even with the eyes closed, and very short-sighted eyes are at higher risk. A detached retina needs a call to 111 straight away.
Conditions Mr Okonkwo Treats with Refractive Lens Exchange
- Loss of reading vision (presbyopia): age-related loss of near focus, usually after 40, which multifocal implants aim to ease.
- Long sight (hypermetropia): almost any level can be corrected.
- High short sight (myopia): lens surgery suits some adults with short sight, though retinal detachment is more common in very short-sighted eyes.
- Astigmatism: implants with built-in astigmatism correction, with laser to extend the range if needed.
- A narrow drainage angle in a long-sighted eye: the thinner implant frees space for fluid and can remove the risk of angle-closure glaucoma.
- Prescriptions outside the range for laser: compare with laser vision correction.
Treatment Options: Which Implant and Which Plan?
All 4 routes use the same operation and local anaesthetic, and what changes is the implant and how the 2 eyes are set.
Multifocal Lens Exchange
A multifocal implant has more than one point of clear focus, covering distance, screens and reading. It suits people who want the widest range without glasses and whose eyes are otherwise healthy, in about 20 minutes per eye. There are more halos and glare, and about 1% of people cannot adapt and have the lens swapped.
EDOF (Extended Depth of Focus)
An EDOF implant stretch your range of clear vision, giving good distance and intermediate sight (computer, dashboard) plus some near vision. Glasses are often still needed for fine print. You may notice halos or glare around lights at night, which usually settle as your brain adapts over several months.
Toric lenses
Toric lenses are available in multifocal, EDOF and monofocal lenses. They correct astigmatism, where the eye is shaped more like a rugby ball than a football. The lens is carefully aligned during surgery to reduce blurring and your need for glasses. Rarely, a lens rotates and needs repositioning. Results are typically sharper distance vision with less dependence on spectacles.
Monofocal Lens Exchange for Distance
A monofocal implant gives 1 sharp focus, normally for driving and distance, for people with other eye conditions or those worried about night-time halos. Surgery time and stay match the multifocal route. You will usually still need reading glasses, but optical side effects are fewer.
Micromonovision with Monofocal Lenses
Here one eye is set for far sight and the other for arm’s length, so with both eyes open the combined range helps with screens and handwork, without multifocal optics. Reading glasses are often still needed for small print.
Lens Exchange Followed by Laser Fine-Tuning
Measurements cannot predict every eye exactly, so laser vision correction is sometimes used afterwards to fine-tune focus or treat leftover astigmatism. It is a separate, short laser session with no hospital stay, though laser vision correction carries its own risks, explained before you agree.
Not Sure Which Implant or Plan Suits You?
Book a Leeds assessment to see whether lens exchange, laser or an ICL fits your eyes, and bring your glasses and contact lens details.
Prefer to call? 0113 460 1923, Monday to Friday, 9am to 5pm
Why Patients Choose Mr Okonkwo for Lens Replacement
- Where he works: consultant clinics at Leeds Teaching Hospitals NHS Trust, and private practice at St James Laser Vision Clinic.
- Refractive training: the Certificate in Laser and Refractive Surgery, and an Ulster University diploma with Distinction.
- Degrees: MBBS, Newcastle University, 2014. Also FRCOphth and an MRes in Transplantation.
- Fellowships: first Moorfields Eye Hospital, then Melbourne.
- Teaching: Honorary Senior Lecturer at the University of Leeds, with a PgCert in medical education.
- Research: over 30 peer-reviewed publications on the cornea and surgical innovation.
Glasses Freedom, Halos and Getting Used to New Lenses
About 4 in 5 people with modern multifocal implants no longer use them. Those who still do usually need them for 1 near, middle or distance task.
Glare, halos, starbursts and ghost images are common, and normally improve within a few months, more so with multifocal lenses than monofocal ones. Adapting takes time: 19 out of 20 people are satisfied 3 to 6 months after a multifocal implant.
Under 50, laser or an implantable contact lens (ICL) usually suits better, because your own lens is still clear and flexible. Over 50, lens exchange is the usual choice.
Alternatives to Refractive Lens Exchange
Lens exchange is elective, so you can go ahead at any time or not at all. Glasses carry none of the surgical risks, and varifocals remain the main alternative for many older adults.
Contact lenses give good all-round sight, though serious corneal infection affects about one wearer in 3,000 each year. Laser vision correction and phakic lens implants are the other 2 surgical routes.
Your Lens Exchange Pathway, Step by Step: First Appointment, Scans and Surgery Day
- Getting started: no referral is needed to book privately, though an optician’s or GP’s notes help.
- Consultation and goals: a longer appointment with Mr Okonkwo and his specialist optometrist, covering driving, screens, reading and hobbies.
- Scans: biometry sets the implant power, and a corneal map checks the front of the eye. Dilating drops blur sight, so do not drive to this visit.
- Thinking time: you get a written 2026 plan and cost, and you decide.
- Surgery and follow-up: numbing drops, about 20 minutes per eye, and home the same day. Both eyes can be done on 1 day or on separate days, with reviews until your sight settles.
Recovery and Risks After Lens Replacement
Sight usually recovers a great deal within 2 to 3 days, once the dilating drops wear off. Wear a shield at night for 1 week. You can shower, jog and use the gym from day 1, while swimming waits a week and contact sports a month.
Serious risks are rare but real: permanent, serious loss of vision affects about 1 in 500. The UK benchmark for capsule tears during surgery is just under 1.5%. Retinal detachment is about 5 times more likely in the first 4 years. Clouding of the capsule behind the implant can follow later and is treated with a short laser YAG capsulotomy.
Where Mr Okonkwo Sees Lens Exchange Patients
Assessments and follow-up take place at St James Laser Vision Clinic on the Gledhow Wing’s fourth floor. The phone line, 0113 460 1923, runs from 9am to 5pm on weekdays.
| Location | Address |
|---|---|
| St James Laser Vision Clinic | Floor 4, Gledhow Wing, St James’s University Hospital, Beckett Street, Leeds LS9 7TF |
| Operating theatre for lens exchange | St James’s University Hospital, Beckett Street, Leeds LS9 7TF |
FAQs About Refractive Lens Exchange
Is lens exchange a major operation?
It is surgery inside the eye, done as a day case under numbing drops in about 20 minutes per eye. Serious sight loss is about 1 in 500, higher than for laser.
How quickly do people recover after lens exchange?
Most of the sharpness returns within 2 to 3 days, though sight and comfort may vary a little for a few weeks.
When is it safe to drive after the operation?
Usually within a few days, once your surgeon agrees you read a plate at 20 metres. Avoid night driving until your eyes have recovered.
Could I still develop a cataract later?
No, because the natural lens has gone. The capsule can cloud instead, and a one-off laser treats it.
Will my prescription return or change again?
Usually not, as without a new eye problem it stays stable. Fine-tuning laser is sometimes needed early on.
Is it better than laser eye surgery?
It depends on age and lens health. Under 50, laser or a phakic implant usually suits; over 50, lens exchange is the usual choice.
What are the alternatives to surgery?
Glasses, varifocals and contact lenses, or laser and phakic implants under 50.
How much does refractive lens exchange cost?
There is no published 2026 price. Aftercare for 12 months is usually included, but a later capsule laser may be charged separately.
Can both eyes be treated on one day?
Often, yes, though you can choose 1 eye at a time after talking through the pros and cons.
Does lens exchange affect future eye care?
No. Glaucoma, diabetic eye disease and macular degeneration stay just as checkable and treatable.
Can I have it if I am very short-sighted?
Yes, almost any level can be corrected. Very short-sighted eyes carry a higher retinal detachment risk, so learn the warning signs.
Quick Info
What is it?
Swapping a clear natural lens for an implant to reduce glasses use
Who is it for?
Mostly people over 50 with a prescription beyond laser range
How long does it take?
About 20 minutes per eye
Hospital stay
None. Home the same day
Recovery
Sight recovers a great deal in 2 to 3 days
Ready to Get Started?
Book a consultation to discuss your symptoms and treatment options.
Book a Lens Exchange Consultation with Mr Arthur Okonkwo
Book a Leeds assessment to see whether lens exchange, laser or an ICL fits your eyes, and bring your glasses and contact lens details.
- Phone: 0113 460 1923 (weekdays, 9am until 5pm)
- Online: book a lens exchange assessment or ask about implants
Worsening pain, redness or blur after surgery should be reported the same day to the eye team, a GP or NHS 111. Treat sudden sight loss, or signs of sepsis, as a 999 or A&E matter.