Still blurry after cataract surgery? Common causes and when to get a second opinion

Cataract surgery is one of the most reliable operations in medicine, so it is unsettling when vision is still not clear. The timing of the blur is the most useful clue.

Urgent first: if you have had eye surgery and now have increasing pain, rapidly worsening vision, a very red eye, new flashes or floaters, or a shadow or curtain across your vision, do not wait for a second opinion. Contact the unit that operated on you the same day, or go to an eye casualty or A&E. These symptoms can signal infection, raised pressure or retinal detachment, which need treatment within hours.

In the first week

Mild blur, watering and a gritty feeling are common while the cornea settles after surgery. Using drops exactly as prescribed matters — see the day-by-day eye drops schedule. Blur that is getting worse rather than better, or comes with pain, needs same-day review.

Weeks two to six

Dry eye is the most common reason for fluctuating vision after surgery and is very treatable. Residual prescription — the eye landing slightly short- or long-sighted, or with some astigmatism — is usually corrected with glasses once the eye is stable at around four to six weeks. Macular swelling (cystoid macular oedema) can blur central vision a few weeks after surgery; it shows on an OCT scan and usually responds to drops.

Months or years later

The most common cause is posterior capsule opacification (PCO) — clouding of the thin membrane behind the lens implant. It feels as if the cataract has come back. It is treated in minutes with YAG laser capsulotomy.

Less common causes

A lens implant that has shifted or tilted, a lens power that does not match the eye, corneal swelling, or another condition such as age-related macular degeneration or glaucoma that was present before surgery. These need careful measurement before any decision about further surgery. Read about cataract surgery with macular degeneration and cataract surgery with glaucoma.

When a second opinion makes sense

If blur has lasted beyond six weeks without a clear explanation, if you have been offered a lens exchange or further surgery, or if you simply want someone to look again with fresh eyes. Ms Pearsall repeats the key measurements, reviews your operation note and lens details, and explains which cause is present and what can be done. See how a second opinion works and our dedicated cataract second-opinion page.

About Ms Tahmina Pearsall

Ms Tahmina Pearsall is a consultant ophthalmic surgeon who qualified in 1993 and has more than 30 years of experience and over 50,000 procedures performed. She trained at Moorfields Eye Hospital, St Thomas' Hospital and Addenbrooke's Hospital, and sees private patients at multiple clinic locations, including Harley Street in London. Read her full credentials.

The first telephone enquiry is free — arrange a free initial call to explain what happened and check whether a review is likely to help. A full clinical consultation with Ms Pearsall costs £250. Treatment prices are listed on the pricing page and confirmed in writing after examination.

This article is general information written for patients and does not replace an individual examination. A second opinion is an independent clinical assessment; it is not a legal review and does not by itself decide whether care elsewhere was right or wrong.