Today we will be talking about ICL — short for Implantable Collamer Lens. If your eye doctor has mentioned it as an alternative to LASIK, here is what the term actually means and what the procedure involves.
What Does ICL Stand For?
ICL stands for Implantable Collamer Lens. It is a small, clear lens that a surgeon places inside the eye — specifically between the iris and your eye’s natural lens — to correct refractive errors such as nearsightedness (myopia) and astigmatism.
What the Lens Is Made Of
Collamer is a biocompatible material that blends collagen with a flexible polymer. It is soft, bends easily for insertion through a small incision, and lets oxygen and nutrients pass through, which helps the eye tolerate the implant well.
How ICL Surgery Differs From LASIK
LASIK reshapes the cornea using a laser. ICL surgery does not touch the cornea at all — instead, it adds a permanent, removable lens inside the eye, working alongside your natural lens rather than replacing or reshaping anything. This makes it a genuine option for people who are not good candidates for LASIK, including those with thin corneas, high prescriptions, or chronic dry eye.
What the Procedure Involves
ICL surgery is an outpatient procedure that typically takes about 30 minutes per eye. A surgeon makes a small incision, then inserts the folded lens, which unfolds and settles into position behind the iris. Because the lens is not permanently fused to eye tissue, it can be removed or exchanged later if needed.
Who Is a Candidate?
Candidates are generally adults between about 21 and 45 (some providers extend this range up to 60) with a stable prescription and healthy eyes free of conditions like glaucoma or cataracts. An eye doctor will need to measure your eyes directly to confirm whether ICL surgery is a good fit for you specifically.
Frequently Asked Questions
Is ICL surgery permanent?
It is intended to be long-term, but unlike LASIK, the lens can be removed or exchanged if your vision needs change or if you need cataract surgery later in life.
Is ICL surgery safe?
Clinical data shows it has a strong safety profile, though as with any eye surgery, there are risks your surgeon will review with you individually, including rare complications like increased eye pressure.
How is ICL different from cataract surgery?
Cataract surgery removes your natural lens and replaces it. ICL surgery leaves your natural lens in place and adds an additional lens alongside it.
For more information, see the CDC.
