What is a cataract?
Inside your eye sits a natural lens that focuses light, like the lens of a camera. With age, this lens slowly becomes cloudy. That clouding is called a . It is not a film on the eye and not a tumor; it is a change inside the lens itself, and it happens to almost everyone who lives long enough.
The clouding lens sits behind the pupil — drag to explore.
3D model: NIH 3D / HuBMAP Human Reference Atlas (3DPX-020963), CC BY 4.0
How does it feel?
- Vision that seems foggy, dim, or as if you are looking through a dirty window
- Glare from headlights or sunlight, and halos around lights at night
- Colors that look faded or yellowish
- Glasses that need changing again and again without ever feeling sharp
Simulated view: Normal vision. This is roughly how the scene looks with a clear, healthy lens.
This is roughly how the scene looks with a clear, healthy lens.
An approximate illustration of how a cataract can change vision. Every person's experience is different.
When is surgery advised?
There is no need to wait for a cataract to "ripen." Surgery is advised when the clouding starts to limit your daily life: reading, driving, recognizing faces, or doing your work safely. The timing is a decision we make together, based on your eyes and your needs.
What happens during surgery?
Modern cataract surgery is usually done with numbing drops, takes well under an hour, and does not require an overnight stay. Through an opening of only a few millimeters, the cloudy lens is broken up with ultrasound (a method called ) and removed. A clear artificial lens, called an , is placed in its place, where it stays for life.
In selected cases, some steps of the operation, such as the incisions, the circular opening in the lens capsule, and softening of the hard lens, can be performed with a femtosecond laser. This laser-assisted approach adds precision for certain eyes, and we discuss whether it offers real benefit in your case.
Choosing your lens
- : sharp vision at one distance, usually far. You will likely still need reading glasses.
- : also corrects , an uneven curvature of the cornea.
- or trifocal lens: designed to give distance, intermediate, and near vision with less dependence on glasses. Some people notice rings or glare around lights at night, and these lenses are not suitable for every eye.
Recovery
Most people notice clearer vision within days. You will use eye drops for a few weeks and should avoid rubbing the eye and heavy strain in the early period. Follow-up visits let us confirm that healing is on track. Serious complications such as infection are rare. If the membrane behind the lens clouds months or years later (posterior capsule opacification, sometimes called “secondary cataract”), a quick, painless laser procedure in the clinic restores clarity in minutes. Cataract surgery is one of the most successful operations in all of medicine, and for most patients it gives back not just sharper sight but brighter, easier days.
Key points
- A cataract is a clouding of the eye's natural lens — not a film on the eye and not a tumor — and it happens to almost everyone who lives long enough.
- Surgery is advised when the clouding starts to limit your daily life; there is no need to wait for a cataract to "ripen."
- The operation uses numbing drops, takes well under an hour, and replaces the cloudy lens with a clear artificial lens that stays for life.
- Monofocal, toric, and multifocal lenses suit different eyes and lifestyles; we make the choice together.
- Most people notice clearer vision within days, and cataract surgery is one of the most successful operations in all of medicine.
Whether this applies to you can only be decided after an examination.