An artificial intraocular lens (IOL) is implanted to replace the cloudy lens. There are different types of IOLs depending on your vision needs.
During cataract surgery, the eye’s cloudy natural lens is removed and replaced with a clear, artificial lens called an intraocular lens (IOL). This implanted lens helps restore sharp vision by correctly focusing light onto the retina — replacing the function of the natural lens that has become clouded due to cataracts.
At Dr. Cronje’s practice, lens selection is tailored to the individual needs of each patient, ensuring optimal visual outcomes based on lifestyle, eye health, and refractive goals.
What Is an Intraocular Lens (IOL)?
An intraocular lens (IOL) is a small, foldable artificial lens that is permanently placed inside the eye during cataract surgery. Once implanted, the IOL becomes a functional part of the eye — helping you improve your vision without the cloudiness caused by cataracts.
The IOL is typically inserted through a tiny incision after the cloudy lens is removed. Because the lens is folded before insertion and unfolds once inside the eye, no stitches are usually required, and the recovery process is smooth and predictable.
Different Types of IOLs
There are several types of IOLs available, each designed to meet different vision needs. Your eye surgeon will help determine the best option for you during your pre-surgical assessment.
Monofocal IOLs
- The most commonly used lens type
- Set to focus at one distance — typically for distance vision
- Glasses may still be needed for reading or intermediate tasks
Multifocal IOLs (Not typically offered at all practices)
- Designed to provide vision at multiple distances (near, intermediate, far)
- May reduce the need for glasses
- Can cause halos or glare in some cases
Toric IOLs
- Used to correct astigmatism in addition to cataracts
- Helps improve sharpness and clarity in patients with irregular corneal shape
How Is the Right Lens Chosen?
Before surgery, the eye is measured using advanced imaging to determine its shape, length, and focusing power. This helps your surgeon select the most appropriate IOL to suit your needs.
Factors considered include:
- Your daily visual tasks (e.g., reading, driving, screen use)
- Whether you have astigmatism or other refractive conditions
- The health of your eye, including the cornea and retina
- Any co-existing eye conditions, such as diabetic retinopathy or macular degeneration
The goal is to restore vision safely and effectively, with the least dependence on glasses or contact lenses where possible.
Final Thoughts
The intraocular lens is a critical part of your cataract surgery outcome. While many patients receive a standard monofocal IOL, other options like toric lenses may be available for those with additional vision needs.
