What Cataract Surgery Feels Like: Awake, the Bright Lights and No Pain
By Pauline Driscoll | Medically reviewed by Mr Lewis Pereira, FRCOphth
Published April 21, 2026 · Last updatedJune 14, 2026 · Last reviewed June 19, 2026 · 3 min read
Key takeaways
- Cataract surgery is usually done awake under local anaesthetic, with numbing drops and sometimes a small injection, so the eye feels pressure but not pain.
- The operation itself typically takes about 15 to 30 minutes, often quoted as around 20 minutes, as a day case.
- You see mostly bright lights and soft colours rather than instruments, because the eye is numb and your gaze is held towards the microscope light.
- Phacoemulsification removes the cloudy lens through a tiny incision of about 2 to 3 mm and inserts a folded intraocular lens that unfolds inside the eye.
- Most people go home the same day and need someone to take them, as the eye is blurry and sensitive at first.
Cataract surgery felt far less dramatic than I had feared: awake under numbing drops, the eye fully anaesthetised, a wash of bright light and soft colours, a vague sense of pressure but no pain, and the whole thing over in about twenty minutes1. It is done as a day case, usually under local anaesthetic, with the patient awake, and the operation itself typically takes about 15 to 30 minutes2.
This is the part of the story I was most frightened of, after deciding to have cataract surgery. For the medical detail see how cataract surgery works and the pillar cataract surgery; the diary continues with the first days after cataract surgery.
Awake, but the eye is numb
You are usually awake under local anaesthetic, with numbing drops and sometimes a small injection, so the eye feels pressure rather than pain1. Being awake was the part that scared me most beforehand, and the part that mattered least once I was there.
The drops went in and within minutes the eye felt thick and far away, the way a numbed tooth feels at the dentist. I was aware of the team chatting quietly, which was strangely steadying. I was not put to sleep, and I did not need the sedative I had braced myself to ask for.
The bright lights and soft colours
What you see is mostly bright light and shifting soft colours, not instruments, because the microscope light is shone into the eye and your gaze is held towards it3. This was the biggest surprise.
I had dreaded watching a needle or a blade approach my eye. Instead the world dissolved into a warm, watery kaleidoscope, lights blooming and merging, a bit like looking up through a sunlit swimming pool. I could not have told you what was happening mechanically, and I could not see my own eye being worked on. It was almost pleasant, in a peculiar way.
Pressure, not pain
The honest sensation is pressure and movement, not pain, because the eye is fully numbed1. If anything is uncomfortable, the team can usually add more anaesthetic.
I felt a gentle, intermittent push, as though someone were leaning a soft thumb against my eye, and some cool fluid running across it. There was a faint sense of busyness without any sharpness. A small clip held my eyelids open so I could not blink the eye shut, which had sounded horrifying on paper and turned out to be completely comfortable once numb.
What is happening while you lie there
Mechanically, the surgeon performs phacoemulsification: through a tiny self-sealing incision of about 2 to 3 mm, usually with no stitches, an ultrasound probe breaks the cloudy lens into fragments and removes them, then the folded intraocular lens is inserted into the capsule, where it unfolds2. All of this happens behind the curtain of light you are watching.
Knowing this afterwards helped me make sense of the gentle whirring and the changes in the light. At the time I simply followed the one instruction that mattered: keep looking towards the light and keep my head still.
Over in minutes, then home
The operation itself typically takes about 15 to 30 minutes, often quoted as around 20 minutes, and it is a day case, so most people go home the same day with someone to take them4. The clock genuinely surprised me.
It felt like a long ten minutes and a short twenty; either way it was far quicker than the worrying I had done beforehand. A pad and a clear shield went over the eye, and I was led out to recover, blinking and faintly euphoric that the thing I had dreaded was already done. What came next is in the first days after cataract surgery.
References
- Cataract surgery, NHS. ↩
- Cataract surgery, American Academy of Ophthalmology. ↩
- Cataract surgery commissioning guidance and patient information, Royal College of Ophthalmologists. ↩
- Cataracts in adults: management (NG77), NICE. ↩
Common questions
Does cataract surgery hurt?
No, it should not hurt. The eye is numbed with anaesthetic drops, and sometimes a small injection, so you feel pressure and movement rather than pain. I felt a vague sensation of someone leaning gently on my eye and some cool fluid, but nothing I would call painful. If you do feel discomfort during the operation, the team can usually add more anaesthetic.
Are you awake during cataract surgery?
Yes, in most cases you are awake under local anaesthetic, as a day case. You are not put to sleep for routine cataract surgery. You will be aware of bright lights and the team talking, but the eye is numb. Some people are offered a mild sedative to help them relax, though many, like me, do not need one once they know what to expect.
What can you see during the operation?
You see mostly bright lights and soft, shifting colours rather than any instruments, because the microscope light is shone into the eye and your gaze is held towards it. Many people describe a kaleidoscope of light and water. You will not see anything sharp or frightening, and you cannot see the surgery being done on your own eye.
How long does cataract surgery take?
The operation itself typically takes about 15 to 30 minutes, often quoted as around 20 minutes, though you will be at the hospital or clinic for longer to prepare and recover. It is done one eye at a time as a day case, and most people go home the same day. You will need someone to take you home, as the eye is blurry afterwards.
What actually happens to the eye during surgery?
The standard technique is phacoemulsification, where a tiny self-sealing incision of about 2 to 3 mm is made, usually with no stitches, and an ultrasound probe breaks up the cloudy lens so it can be removed. A folded artificial intraocular lens is then inserted into the lens capsule, where it unfolds and stays permanently. It is a refined, well-practised routine.
What if I blink or move during cataract surgery?
A small clip gently holds the eyelids open so you cannot blink the eye closed, which sounds alarming but is comfortable once the eye is numb. The team will ask you to look towards the light and keep your head still. If you need to cough or move, you can usually say so and the surgeon will pause. You are not expected to hold yourself rigid.
Written by Pauline Driscoll. Medically reviewed by Mr Lewis Pereira, FRCOphth.
Our guides are written from personal experience and reviewed by a qualified clinician for accuracy. Read our editorial policy.
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