An implantable collamer lens (ICL) is a thin, flexible lens placed inside the eye to correct refractive errors such as moderate to high myopia or astigmatism. It sits behind the iris and in front of the natural lens.
How an ICL Works
The ICL acts like a permanent contact lens inside the eye, adding the precise focusing power needed to sharpen vision. The natural lens remains in place, so accommodation for near vision is preserved in younger patients.
- Often considered when corneas are too thin or irregular for laser surgery
- Can correct a wide range of prescriptions, including very high myopia
- The procedure is usually quick and performed under local anaesthetic
- The lens can be removed or exchanged if necessary in the future
Considerations
Pre-operative assessment includes detailed measurements of the front of the eye to choose the correct size and power. Long-term monitoring checks eye pressure, lens position, and cataract development.
- Risks include cataract, raised eye pressure, and rare endothelial cell loss
- Many patients notice rapid visual improvement after surgery
- Glasses for fine-tuning or near tasks may still be needed
- Protective drops and activity restrictions support early healing
