When is cataract surgery needed?
Cataract surgery is usually recommended when the cataract begins to affect how well you function in daily life.
This may include difficulty with:
- reading
- driving, especially at night
- seeing clearly in bright light
- recognising faces
- working on screens
- carrying out detailed or visually demanding tasks
The decision is not based only on how the cataract looks during examination. It is based primarily on how your vision is functioning in real-life situations.
Some patients may have a visible cataract but little functional impairment, while others may be significantly affected even when the cataract appears relatively modest.
This is why treatment timing is individual. Surgery is considered when the benefits of improved vision are likely to make a meaningful difference to daily life.
It’s common to feel anxious when considering surgery. For the patient considering having their cataracts removed, this video reassures them that they are making the right decision.How cataract surgery is performed
Modern cataract surgery is usually performed using a technique in which the cloudy lens is broken up and removed through a very small incision, after which an artificial lens is inserted into the eye.
In simple terms, the procedure involves:
- creating a small opening in the eye
- accessing the cloudy natural lens
- removing the lens material carefully
- placing an artificial intraocular lens in its position
Because the incision is very small, stitches are often not required.
The surgery is usually performed under local anaesthesia, meaning the eye is numbed while the patient remains awake. Sedation may also be used in some cases to help with relaxation.
Step-by-step overview of phacoemulsification cataract surgery: 1) Corneal incision created; 2) Front layer of lens is peeled off; 3) The cataract is broken up, and vacuumed out; 4) A replacement lens is inserted via the incision.What to expect on the day of surgery
Cataract surgery is generally performed as a day procedure, so patients usually go home the same day.
On the day of surgery, the process typically includes:
- arrival and preparation at the surgical facility
- eye drops and preparation of the eye
- local anaesthesia
- the procedure itself
- short recovery and monitoring afterward
- discharge with instructions and medication
Although the operation itself is usually brief, the total time spent at the facility is longer because of preparation and post-procedure observation.
Patients are usually advised not to drive themselves home after surgery.
Prior to cataract surgery, patients need to complete a series of routine medical tests. This video explains what tests they may get and what they can expect during their visit. Patients need to know what to expect the day of surgery in order to ensure they adhere to instructions and are ready for the procedure. This video covers some general do’s and don’ts for the day of cataract surgery so patients can arrive better prepared.How long cataract surgery takes
The surgical procedure itself is usually completed within approximately 15 to 30 minutes, although this can vary depending on the individual eye and the complexity of the cataract.
Including preparation and recovery time, patients should expect the overall visit to take several hours.
While the procedure is relatively quick, it should not be thought of as rushed. Careful preparation, precision during surgery, and appropriate postoperative guidance are all important parts of the treatment process.
What happens to the lens after removal?
Once the cataract is removed, the eye no longer has its natural lens in place. This is why a replacement lens is inserted during the same procedure.
This artificial lens is designed to remain in the eye permanently and to restore focusing ability as effectively as possible.
Different types of lenses are available, and the most appropriate choice depends on factors such as:
- visual priorities
- presence of astigmatism
- overall eye health
- expectations regarding glasses use
Lens choice is an important part of surgical planning, but it is best discussed in more detail separately.
How vision changes after surgery
Most patients notice improvement in vision after cataract surgery, but the timing and extent of that improvement can vary.
Immediately after surgery, vision may be:
- slightly blurred
- hazy
- watery
- sensitive to light
As the eye begins to settle, visual clarity typically improves.
The eventual outcome depends on several factors, including:
- the health of the retina and optic nerve
- whether other eye conditions are present
- the type of lens used
- how the eye heals after surgery
Some patients notice a marked improvement quickly, while others experience more gradual stabilisation over time.
Is cataract surgery safe?
Cataract surgery is generally considered very safe, especially when performed with appropriate planning and modern techniques.
That said, no surgery is completely without risk. A proper discussion before surgery includes not only expected benefits, but also the possible complications and limitations relevant to the individual patient.
Patients are best served by a balanced understanding:
- cataract surgery is routine and highly successful
- careful assessment remains essential
- risks are real, even if uncommon
- outcomes are best when expectations are informed and realistic
A more detailed explanation of surgical safety and possible complications is provided separately.
Cataract surgery and both eyes
Cataracts often affect both eyes, but they do not always progress at the same rate.
If both eyes require surgery, the operations are usually performed on separate occasions rather than on the same day. This allows the first eye to recover and be assessed before proceeding with the second eye.
The timing between the two procedures depends on:
- the condition of each eye
- the patient’s needs
- the surgical plan
- the recovery of the first eye
