If you are considering implantable collamer lens (ICL) surgery, one of the first practical questions you may ask is whether both eyes can be treated on the same day. It is a very reasonable concern. You want excellent visual outcomes, but you also want reassurance about safety, comfort, and convenience. Understanding how surgeons approach this decision can help you feel more confident.
Many patients assume there is only one “correct” method. In reality, both same-day bilateral surgery and separate-day surgery are performed safely in the UK and worldwide. The appropriate choice depends on your individual prescription, corneal measurements, anterior chamber depth, general eye health, and your surgeon’s established clinical protocol.
When same-day treatment is offered, each eye is handled as a completely separate sterile procedure. Fresh instruments, re-preparation, and strict infection-control measures are used to minimise risk. Modern ICL techniques are highly refined, and complication rates are low when proper screening and surgical standards are followed.
Ultimately, the decision balances medical suitability with your personal comfort level. Some patients prefer the convenience of completing treatment in one visit and recovering once. Others feel more reassured spacing the procedures apart. A detailed consultation allows you and your surgeon to choose the safest and most appropriate plan for your eyes.
Understanding What ICL Surgery Involves
Before discussing timing, it helps to understand what actually happens during ICL surgery. ICL stands for implantable collamer lens, a soft, biocompatible lens that is placed inside the eye, usually behind the iris and in front of your natural lens. It works with your eye’s existing structures to correct short-sightedness, long-sightedness, and sometimes astigmatism.
Unlike laser eye surgery, the cornea is not reshaped or permanently altered. Instead, the correction comes from the implanted lens itself. This distinction is important because it preserves corneal tissue, maintains the natural shape of the eye, and keeps future treatment options open if your visual needs change later in life.
If you are exploring your options for ICL surgery in London, you will undergo detailed scans and measurements before surgery is planned. These assessments evaluate corneal shape, anterior chamber depth, pupil size, and overall eye health to ensure the correct lens size and power are selected for safe, precise, and long-term visual results.
Why Patients Ask About Same-Day Surgery
The idea of treating both eyes on the same day appeals to many patients for practical and personal reasons. Some prefer to minimise clinic visits, while others would rather complete treatment in one planned session. If you are already mentally prepared for surgery, it can feel more convenient to move through the process once rather than repeating it. At the same time, safety concerns are completely understandable and form an important part of the discussion.
- Fewer Appointments and Greater Convenience: Same-day surgery can reduce the number of hospital visits required. This may be particularly helpful for patients with busy work schedules or travel commitments. A single treatment day can simplify planning and logistics.
- One Recovery Period Instead of Two: Recovering from both procedures simultaneously means you only go through one healing phase. Many patients appreciate avoiding a second period of adjustment. This approach can feel more efficient and less disruptive overall.
- Emotional Readiness: Preparing mentally for eye surgery takes time and reassurance. Some patients prefer not to build up anticipation twice. Completing both eyes in one sitting can reduce prolonged anxiety.
- Safety Considerations: It is natural to wonder what would happen if an unexpected issue arose in the first eye. Surgeons assess each case carefully and follow strict safety protocols. The decision to perform same-day surgery is made only when it is considered appropriate and low risk.
In conclusion, asking about same-day surgery reflects a thoughtful balance between convenience and safety. Patients often seek efficiency, but they also want reassurance that the approach is medically sound. Your surgeon will evaluate your eye health, lifestyle, and personal preferences before making a recommendation. Open discussion ensures the plan chosen feels both safe and comfortable for you.
Is Same-Day ICL Surgery Common in the UK?
Yes, same-day bilateral ICL surgery is increasingly common in the UK. Many experienced refractive surgeons routinely treat both eyes in a single session, offering patients the convenience of fewer appointments and a quicker overall recovery.
That said, it is not automatically recommended for everyone. The decision is made on a case-by-case basis, considering factors such as your prescription, eye anatomy, general eye health, and personal comfort level. Some clinics provide both same-day and separate-day options, allowing the approach to be tailored to each patient’s needs.
Modern advances in surgical technique, strict sterile protocols, and improvements in lens technology have made same-day ICL surgery both safe and efficient. While complication rates are low, it is important to remember that all surgeries carry some risk, and careful pre-operative assessment remains essential to ensure optimal outcomes.
How Surgeons Decide If You Are Suitable
Your suitability for same-day ICL surgery depends on a combination of factors that ensure both safety and optimal outcomes. First, your overall eye health is assessed. Conditions such as glaucoma, previous eye surgery, or unusual eye anatomy may influence whether treating both eyes on the same day is advisable.
Prescription stability is another key consideration. If your refraction has been stable over time and your eye measurements are consistent, surgeons are more confident that both eyes can be treated safely in one session. This reduces the likelihood of unexpected refractive changes that could affect outcomes.
Finally, precise measurements of your anterior chamber depth and endothelial cell count are performed. These help confirm that the ICL will fit safely and not compromise corneal health. When all these factors are favourable, same-day bilateral surgery is often considered entirely appropriate, providing convenience without compromising safety.
Infection Control and Safety Protocols
One of the main concerns with performing ICL surgery on both eyes in the same session is the risk of infection. Serious infections after ICL surgery are extremely rare, but surgeons take strict precautions to minimise any possibility.
During same-day bilateral procedures, each eye is treated as a completely separate surgery. Fresh sterile instruments are used for the second eye, the surgical field is fully re-prepared, and separate batches of medications may be applied. This approach greatly reduces the risk of cross-contamination between eyes.
In addition, modern operating theatres in the UK follow rigorous infection control standards, including air filtration, sterilisation protocols, and strict hygiene measures. Combined with careful patient selection and surgical technique, these precautions make same-day ICL surgery a safe and effective option for many patients.
What Happens During the Procedure
If you opt for same-day treatment, the procedure is designed to be structured, calm, and reassuring. Each eye is treated individually, and the surgical team ensures a measured pace throughout. Local anaesthetic drops keep you comfortable, so you remain awake but relaxed. Many patients are pleasantly surprised by how efficient and controlled the experience feels.
- One Eye at a Time: The procedure begins with the first eye, which is treated carefully and independently. This approach allows the surgeon to focus fully on each eye without rushing. Each step is monitored for safety and precision.
- Short Procedure Duration: The treatment usually takes around 15 to 20 minutes per eye. Despite the quick timing, every aspect is performed with meticulous care. Patients often note how smooth and calm the process is.
- Preparation Between Eyes: After the first eye, the team prepares again for the second eye. This is treated as a separate surgery rather than a continuous procedure. Such preparation ensures sterility, focus, and patient safety for the second eye.
- Comfort and Awareness: You remain awake throughout, but local anaesthetic drops prevent discomfort. Many patients find the experience less intimidating than expected, with a sense of control and reassurance. The environment is designed to be supportive and calm.
In conclusion, same-day ICL surgery is carefully organised to prioritise both efficiency and safety. Each eye is treated individually, ensuring attention and precision at every step. The use of local anaesthetic keeps patients comfortable, and the overall experience is often quicker and more controlled than anticipated. Understanding this structure helps set realistic expectations and reduce anxiety before surgery.
Immediate Recovery After Both Eyes Are Treated
If both eyes are treated on the same day, your vision will initially be blurry. This can feel disorientating because you don’t have an untreated eye to rely on for comparison. Some patients describe a temporary sense of imbalance or slight difficulty judging distances, but this usually settles quickly as the eyes adjust to the new lenses.
Vision clarity typically begins to improve within a few hours, and many patients notice a dramatic difference within the first 24 hours. You will go home the same day with protective eye shields and prescribed eye drops to support healing, reduce the risk of infection, and control inflammation. It’s important to follow the drop regimen exactly as directed to ensure optimal recovery.
Mild light sensitivity, watery eyes, or minor discomfort are common in the first day or two. Avoid rubbing your eyes, strenuous activity, or swimming during this early phase. By taking these precautions and attending follow-up appointments, most patients experience rapid visual stabilisation and a smooth, comfortable recovery period.
Advantages of Same-Day ICL Surgery
There are several practical advantages to treating both eyes in the same session. First, you only need to prepare for surgery once, which means fewer days off work, less travel, and less disruption to your routine. This convenience can be particularly appealing for busy patients.
Recovering from both eyes at the same time also means experiencing a single healing period rather than two separate ones. Many patients find this more comfortable and psychologically reassuring, as they complete the process in one step rather than waiting for a second procedure later.
Another benefit is immediate visual balance. With both eyes corrected simultaneously, you do not have to adapt to having one treated eye and one untreated eye for several days or weeks. This can make tasks like walking, reading, and judging distances easier right after surgery. Overall, same-day ICL surgery offers both practical and emotional advantages for suitable candidates.
Why Some Surgeons Prefer Staged Surgery
Even though same-day ICL surgery is safe, some surgeons prefer to treat each eye on separate days. This staged approach is primarily a precautionary measure. In the unlikely event of an unexpected reaction or complication in the first eye, the second eye can be adjusted or delayed, reducing potential risk.
Staging also provides an extra layer of reassurance for both the surgeon and the patient. It allows close monitoring of healing, intraocular pressure, and early visual outcomes before proceeding with the second eye.
Additionally, spacing the procedures can be useful when confirming the refractive outcome of the first eye. This ensures that lens power and positioning for the second eye are optimally tailored, helping achieve the most accurate and balanced vision possible.
How Rare Are Serious Complications?
Serious complications following ICL surgery are uncommon. While infection, significant inflammation, or sudden increases in intraocular pressure are possible, modern lens design, careful patient screening, and strict surgical protocols have made these events very rare.
Because each eye is treated as a separate enclosed system, a complication in one eye does not automatically affect the other. This separation further contributes to the overall safety of the procedure, even when both eyes are treated on the same day.
Surgeons remain cautious, especially if patients have pre-existing risk factors such as high myopia, previous eye surgery, or unusual eye anatomy. Careful pre-operative assessment and adherence to post-operative instructions help minimise risk and ensure safe outcomes.
What About Intraocular Pressure Changes?
Monitoring intraocular pressure (IOP) is an important part of post-ICL care. While most patients experience stable pressure, a temporary rise can occur in some cases. Such increases are generally manageable with medication and careful follow-up. Modern lens designs further reduce the risk by supporting natural fluid circulation within the eye.
- Temporary Pressure Increases: Some patients may experience a short-term rise in IOP after surgery. This is usually mild and can be controlled with prescribed eye drops. Regular monitoring ensures any changes are detected and addressed quickly.
- Both Eyes Monitored in Same-Day Surgery: If both eyes are treated on the same day, your ophthalmologist checks IOP in each eye during follow-up visits. This ensures any changes in pressure are identified early. Separate monitoring for each eye supports safety and effective management.
- Modern ICL Design Benefits: Current ICL lenses feature a central port that allows aqueous fluid to circulate naturally. This reduces the likelihood of pressure buildup inside the eye. It also helps maintain healthy eye function while providing clear vision.
- Importance of Follow-Up Care: Ongoing examinations are essential to track IOP and overall eye health. Even when no issues arise, follow-up visits give reassurance that the implant continues to function safely. Prompt attention to any pressure changes ensures long-term safety.
In conclusion, while minor changes in intraocular pressure can occur after ICL surgery, they are usually temporary and easily managed. Modern lens designs and careful follow-up make pressure-related complications uncommon. Monitoring both eyes, especially in same-day procedures, ensures optimal safety and peace of mind.
Visual Quality in the First Few Days
It is normal for vision to fluctuate slightly during the first few days after same-day ICL surgery. You may notice mild glare, halos around lights, or slight blurriness as your eyes begin to adjust to the new lenses. These effects are part of the normal healing process and are usually temporary.
Since both eyes are healing at the same time, these visual fluctuations can feel more pronounced compared with staged surgery, where one eye has already adapted before the second is treated. Some patients report momentary difficulty with depth perception or focusing on fine details, but these symptoms typically settle quickly.
Vision generally stabilises as inflammation decreases, the tear film normalises, and the brain adapts to the corrected visual input. Most patients notice significant improvement within the first 24 to 48 hours, with further refinement over the following week. Following post-operative instructions, using prescribed eye drops, and attending all follow-up appointments helps ensure a smooth recovery and the best possible long-term visual outcomes.
Driving and Daily Activities
You should not drive on the day of surgery, as your vision may still be blurry and your eyes are in the early stages of healing. Most patients can return to normal light activities, such as reading, using a phone, or watching television, within a day or two. These activities are usually comfortable fairly quickly, but it’s important to listen to your body and avoid straining your eyes.
Your surgeon will confirm when it is safe to drive again, which depends on your visual acuity meeting the legal requirements. Driving too soon can be unsafe, even if your vision feels clearer, so following professional guidance is essential.
One advantage of having both eyes treated together is that balanced binocular vision is typically restored more quickly. Tasks that rely on depth perception, like climbing stairs or judging distances while walking, can feel more natural sooner than with staged surgery, where one eye is treated first and the other later.
Follow-Up Appointments
After same-day bilateral ICL surgery, follow-up appointments are an essential part of your recovery. Typically, you will be seen the day after surgery to check eye pressure, clarity, and the position of the implanted lenses. This early review helps identify any issues promptly and ensures both eyes are healing properly.
Additional follow-ups are scheduled over the following weeks and months to monitor ongoing recovery, assess visual stability, and ensure that the lenses remain correctly positioned. Your surgeon will also check for signs of inflammation, pressure changes, or other complications, even though these are rare.
Regular follow-up visits not only support safe healing but also provide reassurance. They allow your surgeon to confirm that your visual outcome is on track, answer any questions, and adjust post-operative care if needed, helping you achieve the best long-term results.
Is One Approach Safer Than the Other?
Many patients wonder whether same-day or staged ICL surgery is safer. Current evidence indicates that, for appropriately selected patients, same-day bilateral surgery is safe and effective. The most important factor is careful patient selection, which considers eye health, prescription stability, and overall suitability for the procedure.
Strict sterile technique, modern lens design, and the experience of the surgeon play a major role in maintaining safety. Each eye is treated as a separate procedure, further reducing the risk of complications affecting both eyes simultaneously.
For many healthy patients with straightforward prescriptions and no underlying eye conditions, the risk remains very low whether both eyes are treated together or on separate days. Ultimately, the decision is guided by clinical judgment and patient preference, balancing safety, convenience, and visual outcomes.
Emotional Considerations
Your emotional response is an important factor when deciding between same-day or staged ICL surgery. Some patients feel anxious about having both eyes treated at once and may prefer to start with one eye to see how they respond to the procedure. This approach can provide reassurance and allow time to adjust mentally to the early recovery process.
On the other hand, many patients find that completing both eyes in a single session reduces prolonged stress. It eliminates the waiting period for a second procedure, allows them to focus on a single recovery phase, and provides the immediate benefit of balanced vision in both eyes. For some, this approach feels more efficient and psychologically satisfying.
There is no universally correct approach, as everyone’s comfort level and coping style differ. Open communication with your surgeon about your concerns, anxieties, and lifestyle priorities can help guide the decision. When your emotional needs are considered alongside clinical factors, the surgery experience tends to be smoother, more reassuring, and ultimately more satisfying.
Planning Your Schedule
If you choose same-day ICL surgery, it’s important to plan ahead for the day of your procedure. You will need someone to accompany you home, as your vision will be temporarily blurred and driving is not permitted. Having a support person also provides reassurance during the first few hours when you may feel slightly disoriented.
It’s recommended to avoid strenuous activity, swimming, or heavy lifting for a short period following surgery to allow your eyes to heal safely. Light daily tasks, such as reading, using a computer, or watching television, are usually comfortable within a day or two, but it’s important to follow your surgeon’s instructions carefully. Proper adherence to post-operative care helps minimise discomfort and reduces the risk of complications.
Work considerations will vary depending on your job. If you work in an office or low-risk environment, many patients feel ready to return within a few days. Jobs that involve dust, heavy lifting, or high visual demands may require a slightly longer break to protect your eyes. Planning ahead for time off, arranging support at home, and preparing your workspace can make recovery smoother and less stressful, ensuring the best possible visual outcome.
Long-Term Outcomes
Long-term outcomes after ICL surgery are generally excellent. Most patients enjoy stable, clear vision for many years, and the implanted lens remains securely in place unless removal or exchange becomes necessary. Regular check-ups help ensure ongoing eye health, but for the vast majority, long-term results are predictable and reliable.
Treating both eyes on the same day does not negatively impact long-term outcomes in appropriately selected patients. When proper pre-operative assessment, accurate measurements, and careful surgical technique are applied, both eyes heal well and achieve balanced vision simultaneously.
The key to successful long-term results lies in meticulous planning and execution. Choosing an experienced surgeon, following post-operative instructions, and attending all follow-up appointments help maximise safety, visual clarity, and overall satisfaction with the procedure.
When Staged Surgery Might Be Recommended
There are situations where treating each eye on separate days may be recommended. If you have borderline eye measurements, unusual anatomy, or a history of inflammation, a cautious approach allows the surgeon to monitor the first eye before proceeding with the second.
Patients with very high or complex prescriptions may also benefit from staged surgery. Evaluating the outcome of the first eye helps ensure the lens power and placement for the second eye are optimally tailored, improving overall visual balance and reducing the risk of refractive surprises.
Spacing the procedures provides additional reassurance for both the patient and the surgeon. It allows careful monitoring of healing, early detection of any issues, and more precise adjustments if necessary, making it a safer choice in select cases without compromising long-term outcomes.
Making the Right Decision for You
Choosing between same-day and staged ICL surgery should always be a collaborative process. Your surgeon will review your eye measurements, discuss potential risks, and explain which approach is most suitable based on your individual anatomy and prescription.
It’s important that you feel comfortable asking questions about infection control, complication rates, recovery expectations, and any other concerns. Open discussion ensures that you fully understand what to expect and helps align the plan with your lifestyle and comfort level.
Ultimately, the goal is to make a decision that leaves you informed and confident. Whether you opt for same-day bilateral surgery or a staged approach, careful planning, clear communication, and trust in your surgical team are key to a successful, satisfying outcome.
FAQs:
1. Can both eyes be treated with ICL surgery on the same day?
Yes. Same-day bilateral ICL surgery is possible for many patients, provided their eye measurements, prescription stability, and overall eye health are suitable. Each eye is treated as a separate procedure to ensure safety.
2. Is same-day ICL surgery safe?
For appropriately selected patients, same-day surgery is considered safe. Modern sterile protocols, experienced surgeons, and careful pre-operative assessment make complications rare.
3. What are the benefits of same-day ICL surgery?
Advantages include fewer clinic visits, a single recovery period, immediate visual balance in both eyes, and convenience for patients with busy schedules.
4. Why might surgeons recommend staged (separate-day) surgery?
Staged surgery may be preferred if there are borderline measurements, unusual eye anatomy, high or complex prescriptions, or a need to monitor the first eye’s healing before treating the second.
5. How long does each ICL procedure take?
Each eye typically takes 15–20 minutes. Despite the short duration, the procedure is performed with meticulous care and full sterility.
6. What should I expect immediately after same-day surgery?
Vision will initially be blurry, and mild light sensitivity, watery eyes, or minor discomfort may occur. Vision typically begins to improve within a few hours, with significant clarity by 24–48 hours.
7. Can I drive after same-day ICL surgery?
No, driving is not permitted on the day of surgery. Your surgeon will advise when your vision meets legal driving requirements, usually after your initial follow-up confirms stability.
8. How is infection risk minimised when treating both eyes on the same day?
Each eye is treated as a separate procedure with fresh sterile instruments, re-preparation of the surgical field, and strict infection-control measures, making cross-contamination extremely unlikely.
9. Will both eyes heal at the same rate?
Yes, generally both eyes heal simultaneously, though visual fluctuations such as glare, halos, or slight blur can feel more pronounced initially. Most symptoms resolve within days with proper care.
10. Does same-day surgery affect long-term outcomes?
No. When proper assessment, accurate measurements, and surgical technique are applied, same-day ICL surgery provides long-term, stable, and balanced vision comparable to staged surgery.
Final Thoughts: Choosing the Best Approach for Your Eyes
Same-day bilateral ICL surgery can be a safe and convenient option for many patients, offering the benefit of fewer clinic visits, a single recovery period, and faster restoration of balanced vision. Modern surgical techniques, strict sterile protocols, and careful pre-operative assessment ensure that each eye is treated independently, minimising risk and supporting excellent long-term outcomes. However, the decision between same-day or staged surgery should always be personalised, taking into account your eye measurements, prescription stability, anatomy, and comfort level.
Ultimately, both approaches provide excellent visual results when performed by an experienced surgeon, and your choice should prioritise safety, reassurance, and convenience. If you’re looking for ICL Surgery in London, you can get in touch with us at London Cataract Centre to discuss the option that best suits your eyes and lifestyle.
References:
- Russo, A., Filini, O., Mertens, E., Daya, S. M., Conti, L., Carones, F., Boldini, A. and Savini, G., 2024. Immediate sequential bilateral implantable collamer lens surgery is safe and effective: clinical outcomes and safety profiles, Journal of Refractive Surgery, https://pubmed.ncbi.nlm.nih.gov/38717079/
- Shi, Y., Du, C., Gu, Y., Wang, J., 2014. Posterior chamber phakic intraocular lens implantation for high myopia, Chinese Medical Journal (Engl), https://pmc.ncbi.nlm.nih.gov/articles/PMC9638457/
- Pérez‑Montaño, G., Rosas‑Acuña, A., 2020. Effect of Angle Opening Parameters on Corneal Endothelial Cell Density and Intraocular Pressure after Posterior Chamber Phakic ICL Implantation, Journal of Clinical Medicine, https://www.mdpi.com/2077-0383/9/9/2704
- Ebeid, A.A.A.E. and Elsawy, A.M.A., 2025. Comparison of White‑to‑White Measurement by IOL Master, Caliper and Sulcus Measurement for Phakic PC ICL by UBM, QJM: An International Journal of Medicine, https://academic.oup.com/qjmed/article-abstract/118/Supplement_1/hcaf224.176/8341185
- Hassaballa, M.A. and Macky, T.A., 2011. Phakic intraocular lenses outcomes and complications: Artisan vs Visian ICL, Eye (London, England), https://pubmed.ncbi.nlm.nih.gov/21818131/