---
title: What is an IOL implant?
description: "An intraocular lens (IOL) implant is a clear artificial lens inserted into the eye to replace the cloudy natural lens in cataract surgery or to correct refractive error. It becomes a permanent part of the eye. ## Placement and Function…"
url: "https://bluefinvision.com/knowledge-base/topics/treatments-procedures/what-is-an-iol-implant/"
updated: "2025-12-12"
category: "Treatments & Procedures"
---

# What is an IOL implant?

An intraocular lens (IOL) implant is a clear artificial lens inserted into the eye to replace the cloudy natural lens in cataract surgery or to correct refractive error. It becomes a permanent part of the eye.

## Placement and Function

During surgery, the cloudy lens is removed and the folded IOL is inserted through a small incision, where it unfolds and rests in the lens capsule. The IOL focuses light onto the retina, restoring clarity and, where planned, correcting refractive error.

- Most modern IOLs are made of soft acrylic or similar materials
- The procedure is usually done under local anaesthetic as day surgery
- Different powers are chosen individually for each eye
- Astigmatism can be corrected with toric IOL designs

## After Surgery

Vision often improves within days, though complete stabilisation can take weeks. Eye drops reduce inflammation and infection risk while the capsule heals around the implant.

- IOLs are designed to last a lifetime in most cases
- Occasional clouding of the capsule behind the IOL can be treated with YAG laser
- Glasses may still be needed for some tasks depending on the lens type
- Regular follow-up checks eye pressure, clarity, and retinal health