Skip to content Skip to footer

How ICLs Work: An Overview of Implantable Collamer Lenses

Implantable Collamer Lenses (ICLs) have revolutionised vision correction, providing a safe and effective alternative to glasses and contact lenses. This article will explore how ICLs work, their benefits, and considerations for those considering this vision correction option.

What are Implantable Collamer Lenses (ICLs)?

Implantable Collamer Lenses, often called ICLs, are innovative lenses made from Collamer, a biocompatible material that works harmoniously with the eye’s natural structures. These lenses are designed to correct vision by permanently implanting them inside the eye, providing excellent visual outcomes.

How to do ICLs Correct Vision?


ICLs work by altering the way light focuses on the retina. They are positioned between the natural lens and the iris, where they help to correct refractive errors such as myopia (nearsightedness), hyperopia (farsightedness), and astigmatism. Unlike glasses or contact lenses, ICLs work internally to improve vision without requiring daily maintenance.

Benefits of Implantable Collamer Lenses

  1. High Visual Quality: ICLs provide excellent visual clarity and sharpness, often surpassing other vision correction methods.
  2. Wide Range of Vision Correction: ICLs can correct a broad range of refractive errors, addressing each patient’s unique needs.
  3. Long-lasting Results: ICLs offer permanent vision correction once implanted, reducing the need for ongoing adjustments or replacements.
  4. Reversible Option: In case of future changes in vision or technological advancements, ICLs can be removed or replaced.

Natural and Comfortable: ICLs integrate seamlessly with the eye, providing a realistic visual experience and minimal awareness of their presence.

Are ICLs Suitable for Everyone?

While ICLs are highly effective for many individuals, they may only suit some. An eye care professional will evaluate various factors such as age, eye health, and refractive stability to determine whether ICLs are viable for a patient. It is essential to consult with an experienced ophthalmologist to assess candidacy accurately.

The Procedure of Implanting ICLs


The implantation procedure of ICLs is typically quick and painless. It involves several steps, including:

  1. Preoperative Evaluation: The surgeon will perform a comprehensive eye examination to assess the patient’s ocular health and determine the appropriate lens power.
  2. Anaesthesia: Local anesthesia is administered to ensure comfort during the procedure.
  3. Lens Placement: A small incision is made in the cornea, and the ICL is inserted and positioned behind the iris.
  4. Final Adjustments: The surgeon ensures the lens is set correctly and aligned for optimal vision correction.

Recovery and Follow-up: Patients can usually return home on the same day after a short observation period. Regular follow-up appointments are scheduled to monitor the healing process and ensure the eyes adapt well to the implanted ICLs.

Recovery and Aftercare

After the ICL implantation procedure, it is normal to experience some mild discomfort or sensitivity to light.

However, these symptoms usually decrease within a few days. The ophthalmologist might recommend eye drops or medications to prevent infection and facilitate healing. It is essential to adhere to the post-operative instructions given by the surgeon, which may encompass the following:

  1. Avoiding strenuous activities and heavy lifting for a few days.
  2. Wearing protective eyewear, such as sunglasses, to shield the eyes from bright sunlight or dust.
  3. Using prescribed eye drops as directed to prevent infection and minimise inflammation.
  4. Attending follow-up appointments to monitor the healing process and address any concerns.

Potential Risks and Complications

Like any surgical procedure, there are inherent risks and possible complications associated with the implantation of an ICL. These risks include:

  1. Infection: Although rare, there is a small risk of disease following the surgery. Proper post-operative care and adherence to the surgeon’s instructions can minimise this risk.
  2. Elevated Eye Pressure: In some cases, ICL implantation can cause a temporary increase in intraocular pressure. Regular monitoring and appropriate management by the eye surgeon are essential.
  3. Cataracts: Although rare, an ICL can slightly increase the risk of developing cataracts in the future. Regular eye examinations can help detect and manage any potential cataract formation.
  4. Night Vision Issues: Some individuals may experience glare, halos, or difficulty with night vision after ICL implantation. These symptoms often resolve over time as the eyes adjust to the lenses.It is vital to have a detailed discussion with an experienced eye care professional to understand the potential risks and complications associated with ICLs and make an informed decision.

It is vital to have a detailed discussion with an experienced eye care professional to understand the potential risks and complications associated with ICLs and make an informed decision.

Comparison with Other Vision Correction Options

ICLs offer unique advantages over vision correction options, such as glasses, contact lenses, or laser eye surgery. While glasses and contact lenses provide temporary correction, ICLs offer a permanent solution. Additionally, ICLs can correct a more comprehensive range of refractive errors than laser eye surgery, which is primarily suitable for myopia, hyperopia, and astigmatism within certain limits.

Unlike laser eye surgery, ICLs do not involve removing or reshaping corneal tissue. This makes ICLs viable for individuals with thinner corneas or those who may not be suitable candidates for laser procedures.



Implantable Collamer Lenses (ICLs) have transformed the landscape of vision correction by providing a safe, effective, and permanent solution for refractive errors. With their high visual quality, broad range of corrections, and natural integration with the eye, ICLs offer an excellent alternative to glasses, contact lenses, and laser eye surgery.

If you are considering ICLs, it is crucial to consult with a skilled ophthalmologist who can assess your eligibility and provide personalised guidance. Remember, each individual’s vision needs are unique, and a comprehensive evaluation is necessary to determine the most suitable vision correction option.

Clarity Vision

Beyond LASIK, Beyond SMILE

Leave a comment

Go to Top