Conditions A–Z › Cataract

Cataracts & Cataract Surgery

A cataract is a clouding of the eye’s natural lens, which gradually blurs vision. The treatment is an operation to remove the cloudy lens and replace it with a clear implant — one of the most common operations in the world. This page collects our most-watched cataract surgery videos, the step-by-step guide, and answers to the questions patients ask most.

Frequently asked questions

Is cataract surgery painful?

The eye is numbed for the operation, usually with drops or a local anaesthetic, so most people feel pressure or movement rather than pain. Some soreness or grittiness afterwards is common and settles; your clinic will tell you what to expect and what to report.

Will I still need glasses after the operation?

Possibly, yes — for some tasks. The implant is chosen to focus at a particular distance, and many people still use glasses for reading or for fine detail. Your surgeon will talk through the likely outcome for your eyes before you decide.

Are both eyes done on the same day?

Usually not. When both eyes have cataracts, they’re typically treated one at a time, with the second eye done once the first has settled and been checked — although the exact plan is your surgeon’s to set.

This page is for general education only and is not medical advice. Whether and when to have cataract surgery — and which implant suits your eyes — are decisions to make with your own eye surgeon.