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
