Planning cataract surgery
Good planning helps match the operation, lens choice and follow-up to your eyes, health and visual priorities.
Your pre-operative assessment
Your eye-care team will check the cataract and assess the retina, cornea, eye pressure and optic nerve. Measurements of the eye, often called biometry, are used to calculate the power of the replacement lens. Further scans or tests may be recommended when there are other eye conditions.
Share a complete list of your medicines, allergies, medical conditions and previous eye operations. Do not stop blood thinners, diabetes medicines or any other prescribed medicine unless the clinician managing your care specifically tells you to do so. Any required medical tests are based on your health and the planned procedure, rather than being identical for every patient.
Choosing an intraocular lens (IOL)
During surgery the cloudy natural lens is removed and replaced with a clear artificial lens, called an intraocular lens or IOL. The best choice depends on measurements of your eye, your lifestyle, your other eye conditions and your expectations.
- Monofocal lenses are commonly chosen to optimise one distance—usually distance vision. Glasses are often still needed for reading and may be needed for some distance tasks.
- Toric lenses may reduce blur caused by significant astigmatism in suitable eyes.
- Multifocal or extended-depth-of-focus lenses may reduce dependence on glasses for some people, but can also involve trade-offs such as halos, glare or reduced contrast in certain situations. They are not suitable for every eye.
A realistic goal matters: lens calculations are highly refined, but no lens choice can guarantee freedom from glasses or a particular visual result.
Anaesthesia and the day of surgery
Most adult cataract operations are performed with local anaesthesia, often numbing drops and sometimes an injection around the eye. You are usually awake but should not feel pain; you may notice lights, movement or a gentle pressure sensation. General anaesthesia is reserved for selected circumstances.
Follow the hospital's instructions about food, drink, eye drops, arrival time and transport. Arrange for a responsible adult to take you home. Do not plan to drive yourself after surgery.
Questions worth asking
- What result is realistic given the condition of my eyes?
- Which lens options suit my needs, and what are their trade-offs?
- Which of my medicines should I continue on the day of surgery?
- What is the follow-up plan and whom should I contact if I am worried?